Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p3171
A. Krouma
Calcareous soils are known problematic lands for agricultural systems because of the low availability of nutrients, particularly iron (Fe). The so-called strategy I plant (e. g. Pea, Pisum sativum L.) which groups dicotyledons and monocots other than grasses, developed root membrane activities that contribute to the improvement of Fe availability. Among the functions considered to be a critical phase in iron absorption is rhizosphere acidification by H-ATPase and Fe(III) reduced by Fe(III) chelate reducctase (FeCR). In order to experimentally investigate the importance of root FeCR in Fe nutrition, its relationship with rhizosphere acidification and the genotypic differences in response to iron deficiency in pea (Pisum sativum L.), a glasshouse experiment was conducted hydroponically on four genotypes Merveille de Kelvedon (MK); Lincoln (Lin); Douce de Provence (DP) and Alexandra (Alex). Plants of each genotype were distributed into two plots, the first one received full nutrient solution (+ Fe), the second one received nutrient solution devoid of iron (- Fe). Plant growth, Fe distribution, SPAD index and root acidification and ferric chelate reductase activities were evaluated. Fe deficiency decreased plant growth and SPAD index along with the significant increase of H-ATPase and FeCR activities. Some genotypic differences were observed as follows; Alex showed high tolerance to Fe deprivation as compared to other genotypes. Important H-ATPase and FeCR activities, high Fe use efficiency and adequate membrane efficiency are the main reasons for this tolerance. These physiological parameters could be used as tools of tolerance for further breeding programs
众所周知，钙质土壤是农业系统存在问题的土地，因为营养物质，特别是铁(Fe)的可用性低。所谓的策略I植物(如豌豆，Pisum sativum L.)是双子叶植物和单子叶植物，而不是禾草，它们的根膜活性有助于提高铁的有效性。被认为是铁吸收的关键阶段的功能包括h - atp酶的根际酸化和铁(III)螯合还原酶(FeCR)还原的铁(III)。为了研究豌豆(Pisum sativum L.)根系FeCR在铁营养中的重要性、与根际酸化的关系以及对铁缺乏反应的基因型差异，对4个基因型Merveille de Kelvedon (MK)进行了温室水培试验;林肯(林);Douce de Provence (DP)和Alexandra (Alex)。每个基因型的植株分布在2个地块中，第1个地块施用全营养液(+ Fe)，第2个地块施用缺铁营养液(- Fe)。对植物生长、铁分布、SPAD指数、根系酸化和铁螯合还原酶活性进行了评价。缺铁降低了植物生长和SPAD指数，h - atp酶和FeCR活性显著升高。观察到的基因型差异如下:与其他基因型相比，亚历克斯对缺铁表现出较高的耐受性。重要的h - atp酶和FeCR活性，高铁利用率和足够的膜效率是这种耐受性的主要原因。这些生理参数可以作为进一步育种计划的耐受性工具
{"title":"Differential response of pea (Pisum sativum L.) genotypes to iron deficiency in relation to the growth, rhizosphere acidification and ferric chelate reductase activities","authors":"A. Krouma","doi":"10.21475/ajcs.21.15.06.p3171","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p3171","url":null,"abstract":"Calcareous soils are known problematic lands for agricultural systems because of the low availability of nutrients, particularly iron (Fe). The so-called strategy I plant (e. g. Pea, Pisum sativum L.) which groups dicotyledons and monocots other than grasses, developed root membrane activities that contribute to the improvement of Fe availability. Among the functions considered to be a critical phase in iron absorption is rhizosphere acidification by H-ATPase and Fe(III) reduced by Fe(III) chelate reducctase (FeCR). In order to experimentally investigate the importance of root FeCR in Fe nutrition, its relationship with rhizosphere acidification and the genotypic differences in response to iron deficiency in pea (Pisum sativum L.), a glasshouse experiment was conducted hydroponically on four genotypes Merveille de Kelvedon (MK); Lincoln (Lin); Douce de Provence (DP) and Alexandra (Alex). Plants of each genotype were distributed into two plots, the first one received full nutrient solution (+ Fe), the second one received nutrient solution devoid of iron (- Fe). Plant growth, Fe distribution, SPAD index and root acidification and ferric chelate reductase activities were evaluated. Fe deficiency decreased plant growth and SPAD index along with the significant increase of H-ATPase and FeCR activities. Some genotypic differences were observed as follows; Alex showed high tolerance to Fe deprivation as compared to other genotypes. Important H-ATPase and FeCR activities, high Fe use efficiency and adequate membrane efficiency are the main reasons for this tolerance. These physiological parameters could be used as tools of tolerance for further breeding programs","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84580097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p2987
Yared Semahegn, H. Shimelis, M. Laing, I. Mathew
Drought is one of the major constraints to wheat production and productivity globally. Developing drought-adapted wheat cultivars is paramount to increase wheat productivity under variable rainfall conditions. Understanding the genetic variability and trait association is key to the development of improved wheat cultivars. The objective of this study was to determine the extent of the genetic parameters and associations of yield and yield components of bread wheat genotypes, in order to design appropriate breeding strategies for yield improvement in wheat. One hundred and twenty genotypes were evaluated at five test sites in the 2018/19 cropping season using a 10 x 12 alpha lattice design with two replications. Different sowing dates were used to impose contrasting drought stress levels based on the onset of the main seasonal rains at each site. Data were recorded on agronomic traits such as days to heading (DH), days to maturity (DM), plant height (PH), spike length (SL), spikelet per spike (SS), kernel per spike (KS), 1000 kernel weight (TKW) and grain yield (GY). There was significant (p<0.01) genetic variation for all agronomic traits studied under both drought-stressed and non-stressed conditions. The highest estimates for genetic variance were obtained for DH (54.0%), followed by SL (38.3%). The high heritability estimated for DH (94.4%), SL (90.2%) and SS (85.2%), coupled with a high rate of genetic advance, suggest that direct selection for these traits would be effective under drought-stressed conditions. GY exhibited low genetic advance (9%) and heritability (41.5%) estimates, which were concomitant with its polygenic and complex inheritance pattern. Correlation and path analyses revealed that TKW was the most important contributing trait for improving grain yield under drought-stressed conditions
{"title":"Genetic variability and association of yield and yield components among bread wheat genotypes under drought-stressed conditions","authors":"Yared Semahegn, H. Shimelis, M. Laing, I. Mathew","doi":"10.21475/ajcs.21.15.06.p2987","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p2987","url":null,"abstract":"Drought is one of the major constraints to wheat production and productivity globally. Developing drought-adapted wheat cultivars is paramount to increase wheat productivity under variable rainfall conditions. Understanding the genetic variability and trait association is key to the development of improved wheat cultivars. The objective of this study was to determine the extent of the genetic parameters and associations of yield and yield components of bread wheat genotypes, in order to design appropriate breeding strategies for yield improvement in wheat. One hundred and twenty genotypes were evaluated at five test sites in the 2018/19 cropping season using a 10 x 12 alpha lattice design with two replications. Different sowing dates were used to impose contrasting drought stress levels based on the onset of the main seasonal rains at each site. Data were recorded on agronomic traits such as days to heading (DH), days to maturity (DM), plant height (PH), spike length (SL), spikelet per spike (SS), kernel per spike (KS), 1000 kernel weight (TKW) and grain yield (GY). There was significant (p<0.01) genetic variation for all agronomic traits studied under both drought-stressed and non-stressed conditions. The highest estimates for genetic variance were obtained for DH (54.0%), followed by SL (38.3%). The high heritability estimated for DH (94.4%), SL (90.2%) and SS (85.2%), coupled with a high rate of genetic advance, suggest that direct selection for these traits would be effective under drought-stressed conditions. GY exhibited low genetic advance (9%) and heritability (41.5%) estimates, which were concomitant with its polygenic and complex inheritance pattern. Correlation and path analyses revealed that TKW was the most important contributing trait for improving grain yield under drought-stressed conditions","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87713314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p2917
A. M. Chimello, Jeferson Gonçalves de Jesus, S. S. D. Melo, I. Anjos, M. E. Serafim, K. L. Araujo, L. G. Neves
The aim of this paper was to identify the best components involving resistance to the O. neotectonae fungus, allowing for adequate selection of promising teak genotypes to explore in improvement programs or for disease management. Thirty different clonal teak genotypes were evaluated in a greenhouse from PROTECA Biotecnologia Florestal. The experimental design was a randomized block design with three replications and three plants per plot. The following characteristics were evaluated: average latent period, number of pustules per cm2, area below the number of pustules progress curve (ABNPPC), frequency of infection, and number of urediniospores per pustule. The data for the resistance characteristics were submitted to ANOVA and multivariate analysis applying grouping techniques and canonical variables. High genetic variability was observed among the 30 T. grandis genotypes regarding resistance to the O. neotectonae fungus. Both for the Unweighted Pair Group Method with Arithmetic Mean (UPGMA), the canonical variables method and Best Linear Unbiased Prediction (BLUP) the genotypes that showed the greatest resistance to the fungus were genotypes 03 and 10
{"title":"Components of resistance to Olivea neotectonae in Tectona grandis Linn F. as a criterion for selecting promising genotypes","authors":"A. M. Chimello, Jeferson Gonçalves de Jesus, S. S. D. Melo, I. Anjos, M. E. Serafim, K. L. Araujo, L. G. Neves","doi":"10.21475/ajcs.21.15.06.p2917","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p2917","url":null,"abstract":"The aim of this paper was to identify the best components involving resistance to the O. neotectonae fungus, allowing for adequate selection of promising teak genotypes to explore in improvement programs or for disease management. Thirty different clonal teak genotypes were evaluated in a greenhouse from PROTECA Biotecnologia Florestal. The experimental design was a randomized block design with three replications and three plants per plot. The following characteristics were evaluated: average latent period, number of pustules per cm2, area below the number of pustules progress curve (ABNPPC), frequency of infection, and number of urediniospores per pustule. The data for the resistance characteristics were submitted to ANOVA and multivariate analysis applying grouping techniques and canonical variables. High genetic variability was observed among the 30 T. grandis genotypes regarding resistance to the O. neotectonae fungus. Both for the Unweighted Pair Group Method with Arithmetic Mean (UPGMA), the canonical variables method and Best Linear Unbiased Prediction (BLUP) the genotypes that showed the greatest resistance to the fungus were genotypes 03 and 10","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78899682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p2903
N. Aini, W. Yamika, L. Q. Aini, Agus Kurniawan
Salinity is one of the problems in agricultural sector widespread in almost all countries in the world, which could reduce crops yield. This research was carried out to study the effect of frequency application of consortium saline-tolerant bacteria isolates with different soil ameliorants on growth and yield of tomato grown saline lands. Research was conducted using split plot design with three replications. Soil ameliorants (Cow manure and gypsum) were the main plot while sub-plots were frequency applications of consortium bacterial isolates (without bacterial, once, twice, three and four times). In this study, bacteria consortium was SN13 (Streptomyces sp.) + SN22 (Bacillus sp.) and SN23 (Corynebacterium sp.) which isolated from the soil of saline-prone regions of Lamongan, in coastal East Java Indonesia. Results showed that gypsum and cow manure as soil ameliorant did not give significant effect on yield and nutrient uptake of tomato while application of saline-tolerant bacteria was able to improve yield and nutrient uptake of tomato. However, the four times application of saline-tolerant bacteria significantly improved plant height (23.36 %), leaves area (96,49 %), total chlorophyll content (11.86 %), dry weight of plant (103.59 %), fresh weight of fruit (85.51 %), N uptake (135.22 %), P uptake (132.99 %), K uptake (141.68 %) and declined Na uptake (16.28 %), compared to without bacteria application. In conclusion, four times application of saline-tolerant bacteria can alleviate salinity stress of tomato plants in saline lands
{"title":"Application of saline tolerant bacteria and soil ameliorants improved growth, yield \u0000and nutrient uptake of tomato in saline land","authors":"N. Aini, W. Yamika, L. Q. Aini, Agus Kurniawan","doi":"10.21475/ajcs.21.15.06.p2903","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p2903","url":null,"abstract":"Salinity is one of the problems in agricultural sector widespread in almost all countries in the world, which could reduce crops yield. This research was carried out to study the effect of frequency application of consortium saline-tolerant bacteria isolates with different soil ameliorants on growth and yield of tomato grown saline lands. Research was conducted using split plot design with three replications. Soil ameliorants (Cow manure and gypsum) were the main plot while sub-plots were frequency applications of consortium bacterial isolates (without bacterial, once, twice, three and four times). In this study, bacteria consortium was SN13 (Streptomyces sp.) + SN22 (Bacillus sp.) and SN23 (Corynebacterium sp.) which isolated from the soil of saline-prone regions of Lamongan, in coastal East Java Indonesia. Results showed that gypsum and cow manure as soil ameliorant did not give significant effect on yield and nutrient uptake of tomato while application of saline-tolerant bacteria was able to improve yield and nutrient uptake of tomato. However, the four times application of saline-tolerant bacteria significantly improved plant height (23.36 %), leaves area (96,49 %), total chlorophyll content (11.86 %), dry weight of plant (103.59 %), fresh weight of fruit (85.51 %), N uptake (135.22 %), P uptake (132.99 %), K uptake (141.68 %) and declined Na uptake (16.28 %), compared to without bacteria application. In conclusion, four times application of saline-tolerant bacteria can alleviate salinity stress of tomato plants in saline lands","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76096962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p3034
Amandha Lara, I. C. Santos, A. Soares, L. Otutumi, E. Jacomassi, E. C. W. Lovato, Z. C. Gazim, I. L. Rahal, Leiluana Roque Oliva, J. Gonçalves, L. Barbosa, D. Gonçalves
Zingiber officinale Roscoe has been widely used for hundreds of years, whether for its analgesic, antipyretic, or antimicrobial potential. The aim of this study was to evaluate the composition and the ranges of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of aqueous rhizome and leaf extracts of Z. officinale and synergism of these extracts with antibiotics against six isolates of Staphylococcus spp. The chemical composition of the crude extract from the rhizome of Z. officinale cultivated in the region of Umuarama (Brazil) was analyzed by gas chromatography coupled with a mass spectrometer and detected Zingerone (47.65%), α-Zingiberene (14.92%), β-Sesquiphellandrene- (6.16%), α-Curcumene (4.49%), Methyl 10-trans, 12-cis-octadecadienoate (4.42) and Gingerol (4.37). Six samples of Staphylococcus spp. from Veterinary Students’ nasal swabs were collected for antimicrobial susceptibility tests. The antibacterial activities of the aqueous extracts of ginger rhizome and leaves were evaluated with broth microdilution, and then synergism of the rhizome extract with the antimicrobials was verified to calculate the fractional inhibitory concentration index (FICI). All the Staphylococcus spp. samples showed resistance to ampicillin and penicillin, 66.67% to erythromycin, and 33.33% to tetracycline. The MIC90% of each extract was estimated to be 235 mg/mL and 13.27 mg/mL for the leaf and rhizome, respectively. With the aqueous leaf extract, none of the samples presented MBC within the studied concentration range. On the other hand, the MBC obtained by the aqueous rhizome extract was 7.81 mg/mL for 50% of the samples. Calculation of the FICI showed that ½ MIC yielded the best result, with two synergistic relationships when combined with ampicillin. This research shows a potential use for the aqueous extract of ginger as an alternative or auxiliary therapy against resistant microorganisms
{"title":"Composition and Antimicrobial Activity of Ginger (Zingiber officinale Roscoe)","authors":"Amandha Lara, I. C. Santos, A. Soares, L. Otutumi, E. Jacomassi, E. C. W. Lovato, Z. C. Gazim, I. L. Rahal, Leiluana Roque Oliva, J. Gonçalves, L. Barbosa, D. Gonçalves","doi":"10.21475/ajcs.21.15.06.p3034","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p3034","url":null,"abstract":"Zingiber officinale Roscoe has been widely used for hundreds of years, whether for its analgesic, antipyretic, or antimicrobial potential. The aim of this study was to evaluate the composition and the ranges of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of aqueous rhizome and leaf extracts of Z. officinale and synergism of these extracts with antibiotics against six isolates of Staphylococcus spp. The chemical composition of the crude extract from the rhizome of Z. officinale cultivated in the region of Umuarama (Brazil) was analyzed by gas chromatography coupled with a mass spectrometer and detected Zingerone (47.65%), α-Zingiberene (14.92%), β-Sesquiphellandrene- (6.16%), α-Curcumene (4.49%), Methyl 10-trans, 12-cis-octadecadienoate (4.42) and Gingerol (4.37). Six samples of Staphylococcus spp. from Veterinary Students’ nasal swabs were collected for antimicrobial susceptibility tests. The antibacterial activities of the aqueous extracts of ginger rhizome and leaves were evaluated with broth microdilution, and then synergism of the rhizome extract with the antimicrobials was verified to calculate the fractional inhibitory concentration index (FICI). All the Staphylococcus spp. samples showed resistance to ampicillin and penicillin, 66.67% to erythromycin, and 33.33% to tetracycline. The MIC90% of each extract was estimated to be 235 mg/mL and 13.27 mg/mL for the leaf and rhizome, respectively. With the aqueous leaf extract, none of the samples presented MBC within the studied concentration range. On the other hand, the MBC obtained by the aqueous rhizome extract was 7.81 mg/mL for 50% of the samples. Calculation of the FICI showed that ½ MIC yielded the best result, with two synergistic relationships when combined with ampicillin. This research shows a potential use for the aqueous extract of ginger as an alternative or auxiliary therapy against resistant microorganisms","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87950923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p3245
L. D. F. D. A. Melo, J. C. F. M. Junior, Larice Bruna Ferreira Soares, L. Chaves, J. C. A. Neto, V. M. Ferreira, Maria Inajal Rodrigues da Silva das Neves, E. P. Gonçalves, J. S. Viana, R. D. A. Paes, J. F. O. Costa, Wesley Oliveira de Assis
The present study was carried out with the objective of evaluating the ecological and applied aspects of temperature in the germination of Colubrina glandulosa (Rhamnaceae), Chloroleucon dumosum (Fabaceae), Enterolobium contortisiliquum (Fabaceae), Mimosa bimucronata (Fabaceae) and Sapindus saponaria (Sapindaceae). Then we assessed germination, average germination time, germination uniformity and germination activation energy as a function of temperatures. The experiment was conducted at the Plant Propagation Laboratory, on the Engineering and Agricultural Sciences Campus, at the Federal University of Alagoas, Rio Largo, AL, Brazil. The experimental design was completely randomized with four replications of 25 seeds per treatment. The data were subjected to analysis of variance and the means were compared using the Tukey test at 5% probability. The isothermal incubation was performed in Biochemical Oxigen Demand (B.O.D.) germination chamber, at constant temperatures of 5, 10, 15, 20, 25, 30, 35 and 40 ºC and alternating at 20-30 ºC. The seeds of C. glandulosa, C. dumosum, E. contortisiliquum and M. bimucronata germinated in the range of 10 ºC ≤ T ≤ 35 ºC, and S. saponaria germinated in the range of 20 ºC ≤ T ≤ 35 ºC. We found that seeds in the optimal temperature range has unimodal distribution of relative frequency, concentrating germination in the shortest time. The activation energy was positive in the range of 10 ºC ≤ T ≤ 30 ºC, with an inversion of the signal at a temperature of 35 ºC. The studied species had a wide range of temperature tolerance and the speed was curvilinearly dependent on them. The germination process is predominantly endergonic
{"title":"Thermal-biological aspects of germination of seeds in tropical forest tree species","authors":"L. D. F. D. A. Melo, J. C. F. M. Junior, Larice Bruna Ferreira Soares, L. Chaves, J. C. A. Neto, V. M. Ferreira, Maria Inajal Rodrigues da Silva das Neves, E. P. Gonçalves, J. S. Viana, R. D. A. Paes, J. F. O. Costa, Wesley Oliveira de Assis","doi":"10.21475/ajcs.21.15.06.p3245","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p3245","url":null,"abstract":"The present study was carried out with the objective of evaluating the ecological and applied aspects of temperature in the germination of Colubrina glandulosa (Rhamnaceae), Chloroleucon dumosum (Fabaceae), Enterolobium contortisiliquum (Fabaceae), Mimosa bimucronata (Fabaceae) and Sapindus saponaria (Sapindaceae). Then we assessed germination, average germination time, germination uniformity and germination activation energy as a function of temperatures. The experiment was conducted at the Plant Propagation Laboratory, on the Engineering and Agricultural Sciences Campus, at the Federal University of Alagoas, Rio Largo, AL, Brazil. The experimental design was completely randomized with four replications of 25 seeds per treatment. The data were subjected to analysis of variance and the means were compared using the Tukey test at 5% probability. The isothermal incubation was performed in Biochemical Oxigen Demand (B.O.D.) germination chamber, at constant temperatures of 5, 10, 15, 20, 25, 30, 35 and 40 ºC and alternating at 20-30 ºC. The seeds of C. glandulosa, C. dumosum, E. contortisiliquum and M. bimucronata germinated in the range of 10 ºC ≤ T ≤ 35 ºC, and S. saponaria germinated in the range of 20 ºC ≤ T ≤ 35 ºC. We found that seeds in the optimal temperature range has unimodal distribution of relative frequency, concentrating germination in the shortest time. The activation energy was positive in the range of 10 ºC ≤ T ≤ 30 ºC, with an inversion of the signal at a temperature of 35 ºC. The studied species had a wide range of temperature tolerance and the speed was curvilinearly dependent on them. The germination process is predominantly endergonic","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88372686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p2986
V. V. Batista, P. F. Adami, K. F. Oligini, Carlos André Barhy, L. Sartor, Pedro Val erio Dutra Moraes
This study hypothesizes that maize-soybean intercrop with lower maize plant population and nitrogen levels can allow better soybean development and yield, which may offset lower maize biomass and silage crude protein yield. Experiment was carried out in a randomized complete block design arranged in a 2 x 5 factorial scheme, with three replications. Treatments consisted of two different maize-soybean plant stand (40,000 and 60,000 plants ha-1) and five nitrogen fertilization levels (0, 50, 100, 150, and 200 kg ha-1). As a result, soybean biomass yield increased at the lower maize plant stand, although, maize and total (maize + soybean) biomass yield were higher at the greater maize plant stand. Thus, individual maize plants and total dry matter yield increased as nitrogen levels were increased. However, there was no effect of the studied factors on the silage crude protein yield per area, indicating a great potential of soybean to offset biomass yield reduction trough silage quality improvement. Moreover, since there was no difference on total silage crude protein yield per hectare, it is suggested that the adoption of maize-soybean intercrop with lower maize plant stand (40 thousand maize plants ha-1) and with lower nitrogen values is a more environmentally friendly approach to increase farmland sustainability while decreasing environmental and productivity costs. Intermediate levels may be evaluated in future studies
本研究推测，较低玉米种群和氮素水平的玉米-大豆间作可以使大豆发育和产量更好，这可能抵消玉米生物量和青贮粗蛋白质产量的降低。试验采用2 × 5因子随机完全区组设计，3个重复。处理包括2个不同的玉米-大豆株系(4万株和6万株hm -1)和5个氮肥水平(0、50、100、150和200 kg hm -1)。结果表明，低玉米林分的大豆生物量产量增加，而高玉米林分的玉米和总(玉米+大豆)生物量产量更高。因此，玉米单株和总干物质产量随施氮量的增加而增加。但各因素对青贮粗蛋白质单产无显著影响，表明大豆具有通过青贮品质改善来弥补生物量减产的潜力。此外，由于青贮总粗蛋白质每公顷产量没有差异，因此建议采用较低玉米株数(4万株/公顷)和较低氮值的玉米-大豆间作是一种更环保的方法，可以提高农田的可持续性，同时降低环境和生产力成本。中间水平可以在未来的研究中评估
{"title":"Maize-soybean intercrop silage yield and quality with different nitrogen levels and plant population","authors":"V. V. Batista, P. F. Adami, K. F. Oligini, Carlos André Barhy, L. Sartor, Pedro Val erio Dutra Moraes","doi":"10.21475/ajcs.21.15.06.p2986","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p2986","url":null,"abstract":"This study hypothesizes that maize-soybean intercrop with lower maize plant population and nitrogen levels can allow better soybean development and yield, which may offset lower maize biomass and silage crude protein yield. Experiment was carried out in a randomized complete block design arranged in a 2 x 5 factorial scheme, with three replications. Treatments consisted of two different maize-soybean plant stand (40,000 and 60,000 plants ha-1) and five nitrogen fertilization levels (0, 50, 100, 150, and 200 kg ha-1). As a result, soybean biomass yield increased at the lower maize plant stand, although, maize and total (maize + soybean) biomass yield were higher at the greater maize plant stand. Thus, individual maize plants and total dry matter yield increased as nitrogen levels were increased. However, there was no effect of the studied factors on the silage crude protein yield per area, indicating a great potential of soybean to offset biomass yield reduction trough silage quality improvement. Moreover, since there was no difference on total silage crude protein yield per hectare, it is suggested that the adoption of maize-soybean intercrop with lower maize plant stand (40 thousand maize plants ha-1) and with lower nitrogen values is a more environmentally friendly approach to increase farmland sustainability while decreasing environmental and productivity costs. Intermediate levels may be evaluated in future studies","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82035839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.21475/ajcs.21.15.06.p2981
D. S. D. Castro, I. Moreira, F. C. D. Sousa, W. P. Silva, J. P. Gomes, A. J. M. Queiroz, C. M. D. P. S. Silva, B. A. Melo
The present study aimed to characterize the physical, chemical and rheological properties of starch extracted from pitomba seeds and verify the influence of its addition on the syneresis and viscosity characteristics of ketchup during storage, compared to maize starch. Extraction was performed by grinding the seeds in sodium metabisulfite solution (0.2%) followed by drying at 50 ºC. ketchups were formulated with the addition of 0.5 and 1% pitomba starch, 0.5 and 1% maize starch and a control formulation. Starch showed low percentages of protein, ashes and lipid, starch purity of 77.78%, amylose of 19.25%, apparent density of 0.46 g/cm3 and compact density of 0.66 g/cm3. The starch pastes showed pseudoplastic behavior and imparted significant viscosity, usable in increasing the consistency of fluid foods. Ketchups formulated with addition of pitomba starch showed reduction of syneresis during storage, and the 1% starch concentration can slow down the syneresis process in ketchup at temperatures of 7 and 25 °C, similar to the stabilizing capacity of maize starch. Ketchup viscosity increased with the addition of pitomba and maize starches, but the highest apparent viscosities were obtained in ketchup with addition of pitomba starch during storage
{"title":"Physical, chemical and rheological properties of pitomba (Talisia esculenta) seed starch and its application as a thickener and stabilizer in ketchup","authors":"D. S. D. Castro, I. Moreira, F. C. D. Sousa, W. P. Silva, J. P. Gomes, A. J. M. Queiroz, C. M. D. P. S. Silva, B. A. Melo","doi":"10.21475/ajcs.21.15.06.p2981","DOIUrl":"https://doi.org/10.21475/ajcs.21.15.06.p2981","url":null,"abstract":"The present study aimed to characterize the physical, chemical and rheological properties of starch extracted from pitomba seeds and verify the influence of its addition on the syneresis and viscosity characteristics of ketchup during storage, compared to maize starch. Extraction was performed by grinding the seeds in sodium metabisulfite solution (0.2%) followed by drying at 50 ºC. ketchups were formulated with the addition of 0.5 and 1% pitomba starch, 0.5 and 1% maize starch and a control formulation. Starch showed low percentages of protein, ashes and lipid, starch purity of 77.78%, amylose of 19.25%, apparent density of 0.46 g/cm3 and compact density of 0.66 g/cm3. The starch pastes showed pseudoplastic behavior and imparted significant viscosity, usable in increasing the consistency of fluid foods. Ketchups formulated with addition of pitomba starch showed reduction of syneresis during storage, and the 1% starch concentration can slow down the syneresis process in ketchup at temperatures of 7 and 25 °C, similar to the stabilizing capacity of maize starch. Ketchup viscosity increased with the addition of pitomba and maize starches, but the highest apparent viscosities were obtained in ketchup with addition of pitomba starch during storage","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82075597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-03DOI: 10.36548/JISMAC.2021.2.004
S. Madhura, G. Deepthi, B. Chinnitaha, D. Disha
Various physical parameters like humidity, temperature, raindrop, GSM, atmospheric pressure and LDR can be monitored effectively and can be made more interactive with the help of different sensors that are interfaced with microcontrollers like ATmega328P. All the sensors can be connected to this microcontroller ATmega328P as the center preparing unit for the whole framework and plans can be associated with the microcontroller. The real-time monitoring of the various systems becomes possible with this IoT based system. The Paper displays different application based on IoT and proves that the monitoring and control of the system becomes flexible, robust and effective for any real-time implementation .
{"title":"IoT Based Monitoring and Control System using Sensors","authors":"S. Madhura, G. Deepthi, B. Chinnitaha, D. Disha","doi":"10.36548/JISMAC.2021.2.004","DOIUrl":"https://doi.org/10.36548/JISMAC.2021.2.004","url":null,"abstract":"Various physical parameters like humidity, temperature, raindrop, GSM, atmospheric pressure and LDR can be monitored effectively and can be made more interactive with the help of different sensors that are interfaced with microcontrollers like ATmega328P. All the sensors can be connected to this microcontroller ATmega328P as the center preparing unit for the whole framework and plans can be associated with the microcontroller. The real-time monitoring of the various systems becomes possible with this IoT based system. The Paper displays different application based on IoT and proves that the monitoring and control of the system becomes flexible, robust and effective for any real-time implementation .","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85164010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-12DOI: 10.36548/JISMAC.2021.2.002
Edriss E. B. Adam, Sathesh
Recently, the image reconstruction study on EIT plays a vital role in the medical application field for validation and calibration purpose. This research article analyzes the different types of reconstruction algorithms of EIT in medical imaging applications. Besides, it reviews many methods involved in constructing the electrical impedance tomography. The spatial distribution and resolution with different sensitivity has been discussed here. The electrode arrangement of various methods involved in the EIT system is discussed here. This research article comprises of adjacent drive method, cross method, and alternative opposite current direction method based on the voltage driven pattern. The assessment process of biomedical EIT has been discussed and investigated through the impedance imaging of the existent substances. The locality of the electrodes can be calculated and fixed for appropriate methods. More specifically, this research article discusses about the EIT image reconstruction methods and the significance of the alternative opposite current direction approach in the biomedical system. The change in conductivity test is further investigated based on the injection of current flow in the system. It has been established by the use of Electrical Impedance Tomography and Diffuse Optical Tomography Reconstruction Software (EDITORS) software, which is open-source software.
{"title":"Survey on Medical Imaging of Electrical Impedance Tomography (EIT) by Variable Current Pattern Methods","authors":"Edriss E. B. Adam, Sathesh","doi":"10.36548/JISMAC.2021.2.002","DOIUrl":"https://doi.org/10.36548/JISMAC.2021.2.002","url":null,"abstract":"Recently, the image reconstruction study on EIT plays a vital role in the medical application field for validation and calibration purpose. This research article analyzes the different types of reconstruction algorithms of EIT in medical imaging applications. Besides, it reviews many methods involved in constructing the electrical impedance tomography. The spatial distribution and resolution with different sensitivity has been discussed here. The electrode arrangement of various methods involved in the EIT system is discussed here. This research article comprises of adjacent drive method, cross method, and alternative opposite current direction method based on the voltage driven pattern. The assessment process of biomedical EIT has been discussed and investigated through the impedance imaging of the existent substances. The locality of the electrodes can be calculated and fixed for appropriate methods. More specifically, this research article discusses about the EIT image reconstruction methods and the significance of the alternative opposite current direction approach in the biomedical system. The change in conductivity test is further investigated based on the injection of current flow in the system. It has been established by the use of Electrical Impedance Tomography and Diffuse Optical Tomography Reconstruction Software (EDITORS) software, which is open-source software.","PeriodicalId":11075,"journal":{"name":"Day 1 Mon, June 28, 2021","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77832377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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