Saline stress is recognized as one of the most important abiotic stresses for plants in some regions of the world. Recent studies showed that silicon (Si) can play an important role in plant resistance to environmental conditions, such as excessive salinity. In the present experiment, Sinapis nigra L. was exposed to two levels of salinity (50 and 100 mM NaCl). To study the effect of Si addition on the concentrations of K+, Ca2+, Na+, and P, in the vegetative parts of plants, 5 mM of Si in the form of fertilizer (Siliplant) was added to the nutrient solutions. The experiment was conducted in semi-controlled conditions. The results showed that both salinity levels significantly increased the concentration of Na+ in leaves, stems, and roots, whereas the concentration of Ca2+ and K+ were decreased (up to 55% and 90% in the presence of 100 mM NaCl). The addition of Siliplant to the saline nutrient solution (50 mM NaCl) was efficient in decreasing Na+ accumulation in leaves and stem, while in roots more alleviating effect of Si addition was pronounced in the presence of 100 mM NaCl (Na+ concentration decreased by 50%). The presence of Si in 50 mM NaCl containing nutrient solution enhanced the accumulation of K+ in leaves and stems, while Ca2+ concentration was decreased, or the addition of Si to a nutrient solution had a negligible effect. Based on the results of the present study, the application of Si in the form of fertilizer was found more efficient in the presence of lower salt concentration (50 mM NaCl). Therefore, higher doses of the fertilizer should be considered and tested in case of higher NaCl concentrations in the substrate.
在世界上一些地区，盐胁迫被认为是植物最重要的非生物胁迫之一。最近的研究表明，硅(Si)在植物对环境条件(如过度盐度)的抗性中起着重要作用。在本试验中，将黑sinapi L.暴露于50和100 mM NaCl两个盐度水平下。为了研究添加Si对植物营养部位K+、Ca2+、Na+和P浓度的影响，在营养液中添加5 mM的Si肥(sililplant)。实验是在半控制条件下进行的。结果表明，两种盐度水平均显著提高了叶片、茎和根中Na+的浓度，而Ca2+和K+的浓度则分别降低了55%和90%(在100 mM NaCl存在下)。在盐性营养液(50 mM NaCl)中添加硅能有效降低叶片和茎中Na+的积累，而在100 mM NaCl中添加硅能显著缓解根中Na+的积累(Na+浓度降低50%)。在含有50 mM NaCl的营养液中添加Si可以促进叶片和茎中K+的积累，而Ca2+浓度降低，或者在营养液中添加Si的影响可以忽略不计。根据本研究的结果，在盐浓度较低(50 mM NaCl)的情况下，以肥料形式施用Si的效率更高。因此，在基质中NaCl浓度较高的情况下，应考虑施用更高剂量的肥料并进行试验。
{"title":"The accumulation of K+, Ca2+, Na+ and P in Sinapis nigra L. grown in the presence of NaCl and silicon","authors":"M. Daničić, M. Putnik-Delić, D. Lazić, S. Djuric","doi":"10.2298/zmspn1937077d","DOIUrl":"https://doi.org/10.2298/zmspn1937077d","url":null,"abstract":"Saline stress is recognized as one of the most important abiotic stresses for plants in some regions of the world. Recent studies showed that silicon (Si) can play an important role in plant resistance to environmental conditions, such as excessive salinity. In the present experiment, Sinapis nigra L. was exposed to two levels of salinity (50 and 100 mM NaCl). To study the effect of Si addition on the concentrations of K+, Ca2+, Na+, and P, in the vegetative parts of plants, 5 mM of Si in the form of fertilizer (Siliplant) was added to the nutrient solutions. The experiment was conducted in semi-controlled conditions. The results showed that both salinity levels significantly increased the concentration of Na+ in leaves, stems, and roots, whereas the concentration of Ca2+ and K+ were decreased (up to 55% and 90% in the presence of 100 mM NaCl). The addition of Siliplant to the saline nutrient solution (50 mM NaCl) was efficient in decreasing Na+ accumulation in leaves and stem, while in roots more alleviating effect of Si addition was pronounced in the presence of 100 mM NaCl (Na+ concentration decreased by 50%). The presence of Si in 50 mM NaCl containing nutrient solution enhanced the accumulation of K+ in leaves and stems, while Ca2+ concentration was decreased, or the addition of Si to a nutrient solution had a negligible effect. Based on the results of the present study, the application of Si in the form of fertilizer was found more efficient in the presence of lower salt concentration (50 mM NaCl). Therefore, higher doses of the fertilizer should be considered and tested in case of higher NaCl concentrations in the substrate.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68372099","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}
D. B. Najvirt, S. Djuric, I. T. Hajnal-Jafari, R. Stamenov
A large amount of agricultural organic matter (AOM) comes into soil every day, through organic remains, and it is decomposed by bacteria, fungi and actinomycetes (Ugarkovic et al, 2011). The aim of this research was to select isolates of bacteria with the most organic matter degrading potential, by isolating the bacteria from five different types of soil. Isolation of bacteria was conducted from five types of soil - luvisol, cambisol, chernozem, forest land and meadow. Characterization of bacterial isolates was conducted based on morphological, physiological and biochemical features. Isolates with the most organic matter degrading potential could be used in the near future for conceptualizing microbiological preparation.
大量的农业有机质(AOM)每天通过有机残留物进入土壤，并被细菌、真菌和放线菌分解(Ugarkovic et al .， 2011)。本研究的目的是通过从五种不同类型的土壤中分离细菌，选择具有最大有机物降解潜力的细菌分离物。从5种土壤中分离细菌，分别是草甸土壤、黑钙土、林地土壤和草甸土壤。根据形态、生理生化特征对分离菌株进行鉴定。具有最大有机物降解潜力的分离物可以在不久的将来用于概念化微生物制剂。
{"title":"Characteristics of agricultural organic matter degrading bacterial isolates from different types of soil","authors":"D. B. Najvirt, S. Djuric, I. T. Hajnal-Jafari, R. Stamenov","doi":"10.2298/zmspn1936069n","DOIUrl":"https://doi.org/10.2298/zmspn1936069n","url":null,"abstract":"A large amount of agricultural organic matter (AOM) comes into soil every day, through organic remains, and it is decomposed by bacteria, fungi and actinomycetes (Ugarkovic et al, 2011). The aim of this research was to select isolates of bacteria with the most organic matter degrading potential, by isolating the bacteria from five different types of soil. Isolation of bacteria was conducted from five types of soil - luvisol, cambisol, chernozem, forest land and meadow. Characterization of bacterial isolates was conducted based on morphological, physiological and biochemical features. Isolates with the most organic matter degrading potential could be used in the near future for conceptualizing microbiological preparation.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371250","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}
Urinary tract infections (UTI) are one of the most common infectious diseases, primarily caused by bacteria present in the intestinum, affecting the entire urinary tract or only a part of it. If the urinary bladder and urethra are affected then they are considered ?lower? urinary tract infections, and the affected kidneys and ureter are considered ?upper? urinary tract infections. There is a division into uncomplicated and complicated UTIs. Approximately 15% of all prescribed antibiotics in the United States are prescribed as therapy of UTIs. The UTI data from other countries are similar. The costs incurred in the treatment of these infections are significant - in the United States, the direct costs of UTI treatments are estimated at $ 1.6 billion per year.
{"title":"Urinary tract infections and their importance","authors":"G. Smieško, M. Mikov, Vera Gusman, M. Djanic","doi":"10.2298/zmspn1936173s","DOIUrl":"https://doi.org/10.2298/zmspn1936173s","url":null,"abstract":"Urinary tract infections (UTI) are one of the most common infectious diseases, primarily caused by bacteria present in the intestinum, affecting the entire urinary tract or only a part of it. If the urinary bladder and urethra are affected then they are considered ?lower? urinary tract infections, and the affected kidneys and ureter are considered ?upper? urinary tract infections. There is a division into uncomplicated and complicated UTIs. Approximately 15% of all prescribed antibiotics in the United States are prescribed as therapy of UTIs. The UTI data from other countries are similar. The costs incurred in the treatment of these infections are significant - in the United States, the direct costs of UTI treatments are estimated at $ 1.6 billion per year.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371619","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}
A. Nedić, M. Pucarević, Jordana Ninkov, N. Stojić, D. Milić
Mercury (Hg) and potentially toxic elements (PTEs) are components of household dust and are a risk for human health. The aim of this study was to determine the concentrations of Hg and PTEs in household dust in individual housing facilities in the town of Sid, Serbia and their correlation to the content of the elements found in the surrounding garden soil. Total of 64 samples of household dust were collected from 16 locations of individual housing facilities on 4 occasions. Samples of surrounding yard and garden soil were simultaneously collected. None of the 64 analysed soil samples exceeded the threshold limit (TL) prescribed by law for non-agricultural soil, which is 0.3 mg kg-1 DM. Content of Hg in household dust was much higher than in the surrounding soil and ranged from 0.005 to 1.566 mg kg-1 DM. The resulting values of PTEs (As, B, Co, Cr, Cu, Ni, Pb, and Zn) in household dust had a significantly higher range than in the soil. Contents of Hg, B, Cu, and Zn were much higher in household dust than in the soil. According to the results of correlations of the analysed elements in household dust and surrounding soil, and according to the analysed locations, direct effect of Hg and PTEs contents on the content of the same elements in household dust was not confirmed.
{"title":"Mercury content and distribution in household dust and soil in the town of Sid","authors":"A. Nedić, M. Pucarević, Jordana Ninkov, N. Stojić, D. Milić","doi":"10.2298/zmspn1937033n","DOIUrl":"https://doi.org/10.2298/zmspn1937033n","url":null,"abstract":"Mercury (Hg) and potentially toxic elements (PTEs) are components of household dust and are a risk for human health. The aim of this study was to determine the concentrations of Hg and PTEs in household dust in individual housing facilities in the town of Sid, Serbia and their correlation to the content of the elements found in the surrounding garden soil. Total of 64 samples of household dust were collected from 16 locations of individual housing facilities on 4 occasions. Samples of surrounding yard and garden soil were simultaneously collected. None of the 64 analysed soil samples exceeded the threshold limit (TL) prescribed by law for non-agricultural soil, which is 0.3 mg kg-1 DM. Content of Hg in household dust was much higher than in the surrounding soil and ranged from 0.005 to 1.566 mg kg-1 DM. The resulting values of PTEs (As, B, Co, Cr, Cu, Ni, Pb, and Zn) in household dust had a significantly higher range than in the soil. Contents of Hg, B, Cu, and Zn were much higher in household dust than in the soil. According to the results of correlations of the analysed elements in household dust and surrounding soil, and according to the analysed locations, direct effect of Hg and PTEs contents on the content of the same elements in household dust was not confirmed.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371918","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}
G. M. Pusic, M. Mladenovic, D. J. Cukanovic, D. Lakicevic, M. Pavlović
The purpose of this paper is to determinate the influence of salinity on the growth and development of pansies (Viola x wittrockiana Gams.). The objective of the present study was to examine the cultivation area selection and use of pansies related to the autumn and winter flowering aspects. A total of 40 pansy seedlings were included in the study and allocated to four groups of ten each. The experiment conducted four involved treatments: control (K), treatment with 3g/l NaCl (T1), treatment with 5g/l NaCl (T2), and treatment with 7 g/l NaCl (T3). Concentrated water was used for watering the seedlings observed during growth. Over the course of the eight-week experiment, the following quantitative and qualitative properties of the pansy seedlings were measured: height, number of leaves, number of flowers, diameter of flowers, length of leaves, width of leaves, as well as the vitality and decorativeness of the pansy seedlings. The results obtained show that pansies can tolerate increased amounts of salt (5 g/l and 7 g/l NaCl) with adverse effects on the growth, development, vitality and decorativeness of the plant.
{"title":"Influence of salinity on the growth and development of pansies (Viola x wittrockiana Gams.)","authors":"G. M. Pusic, M. Mladenovic, D. J. Cukanovic, D. Lakicevic, M. Pavlović","doi":"10.2298/zmspn1937057p","DOIUrl":"https://doi.org/10.2298/zmspn1937057p","url":null,"abstract":"The purpose of this paper is to determinate the influence of salinity on the growth and development of pansies (Viola x wittrockiana Gams.). The objective of the present study was to examine the cultivation area selection and use of pansies related to the autumn and winter flowering aspects. A total of 40 pansy seedlings were included in the study and allocated to four groups of ten each. The experiment conducted four involved treatments: control (K), treatment with 3g/l NaCl (T1), treatment with 5g/l NaCl (T2), and treatment with 7 g/l NaCl (T3). Concentrated water was used for watering the seedlings observed during growth. Over the course of the eight-week experiment, the following quantitative and qualitative properties of the pansy seedlings were measured: height, number of leaves, number of flowers, diameter of flowers, length of leaves, width of leaves, as well as the vitality and decorativeness of the pansy seedlings. The results obtained show that pansies can tolerate increased amounts of salt (5 g/l and 7 g/l NaCl) with adverse effects on the growth, development, vitality and decorativeness of the plant.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371836","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}
Ivana Trbojević, D. Predojević, J. Šinžar-Sekulić, N. Nikolić, Ivana Jovanović, G. Subakov-Simić
Unique marshland area in the Danube floodplain - Special Nature Re?serve Gornje Podunavlje is considered to be one of the last aquatic flora and fauna refuges in the region. The revitalization projects in SNP Gornje Podunavlje started in 2011. They were conducted in order to protect biodiversity and to provide the natural ecosystem. The aim of this study was to investigate and compare the present diversity and distribution of the charophytes in five ponds of SNR Gornje Podunavlje, depending on phases of the revitalization process within the ponds. The researched area includes the following ponds: Semenjaca, Sarkanj, Siroki rit, Sakajtas and Ribolov. The Siroki rit pond was under the process of revitalization during the field surveys, Semenjaca and Sarkanj have already been revitalized, and Ribolov and Sakajtas were not exposed to the revitalization processes at all. The field surveys were conducted monthly, from May to September 2016. Water quality parameters were measured in situ and in laboratory. Ponds differed considerably when it comes to water chemistry; Semenjaca and Sarkanj were associated with highest nutrient concentrations, while Siroki rit was characterized by highest conductivity and water hardness. The highest diversity was found in Siroki rit pond, which was still in process of revitalization when the field survey was conducted. Charophytes were not detected within previously revitalized ponds (Semenjaca and Sarkanj). Eight species of charophytes were detected: Chara contraria, Chara globularis, Chara tenuispina, Chara vulgaris, Nitella confervacea, Nitella gracilis, Nitella syncarpa and Tolypella prolifera.
{"title":"Charophytes of Gornje Podunavlje ponds: Revitalization process aspect","authors":"Ivana Trbojević, D. Predojević, J. Šinžar-Sekulić, N. Nikolić, Ivana Jovanović, G. Subakov-Simić","doi":"10.2298/zmspn1936123t","DOIUrl":"https://doi.org/10.2298/zmspn1936123t","url":null,"abstract":"Unique marshland area in the Danube floodplain - Special Nature Re?serve Gornje Podunavlje is considered to be one of the last aquatic flora and fauna refuges in the region. The revitalization projects in SNP Gornje Podunavlje started in 2011. They were conducted in order to protect biodiversity and to provide the natural ecosystem. The aim of this study was to investigate and compare the present diversity and distribution of the charophytes in five ponds of SNR Gornje Podunavlje, depending on phases of the revitalization process within the ponds. The researched area includes the following ponds: Semenjaca, Sarkanj, Siroki rit, Sakajtas and Ribolov. The Siroki rit pond was under the process of revitalization during the field surveys, Semenjaca and Sarkanj have already been revitalized, and Ribolov and Sakajtas were not exposed to the revitalization processes at all. The field surveys were conducted monthly, from May to September 2016. Water quality parameters were measured in situ and in laboratory. Ponds differed considerably when it comes to water chemistry; Semenjaca and Sarkanj were associated with highest nutrient concentrations, while Siroki rit was characterized by highest conductivity and water hardness. The highest diversity was found in Siroki rit pond, which was still in process of revitalization when the field survey was conducted. Charophytes were not detected within previously revitalized ponds (Semenjaca and Sarkanj). Eight species of charophytes were detected: Chara contraria, Chara globularis, Chara tenuispina, Chara vulgaris, Nitella confervacea, Nitella gracilis, Nitella syncarpa and Tolypella prolifera.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371204","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}
Petar Davidović, Dajana J. Blagojević, O. Babić, J. Simeunović
The worldwide occurrence of toxic cyanobacterial blooms and their numerous harmful effects have instigated extensive research into the environmental conditions promoting such events. Among the environmental factors which have been suggested to influence the increase in cyanobacterial proliferation, nutrient levels have been identified as one of the most prominent, affecting the growth and toxic metabolite production of cyano?bacteria in freshwater ecosystems. In the present study, toxicity of the cyanobacterial strain Microcystis PCC 7806 was evaluated after growth in media with three different nitrogen concentrations. The toxicity of intracellular extracts was analyzed during different growth phases (after 7, 21, and 35 days of cultivation) by observing mortality rates in the Artemia salina bioassay after 24h and 48h of exposure. The results have not shown significantly higher mortality levels between the test organisms exposed to extracts obtained from the cultures grown in the presence of higher nitrogen content (1.5 g/l and 0.8 g/l) and those grown in a nitrogen-free medium. A dose dependent effect, however, can be observed in most cases, with the most substantial changes observed in the high-dose groups. Also, the toxic effects and larval mortality increased during the exposure, suggesting the time-dependent toxicity. Extracts obtained after longer periods of cultivation (21 and 35 days) had stronger effects on the test organisms, which indicates that the toxicity of the tested cyanobacterial strain depends on the specific growth phase.
{"title":"The influence of nitrogen and growth phase on the toxicity of the cyanobacterial strain Microcystis PCC 7806","authors":"Petar Davidović, Dajana J. Blagojević, O. Babić, J. Simeunović","doi":"10.2298/zmspn1936089d","DOIUrl":"https://doi.org/10.2298/zmspn1936089d","url":null,"abstract":"The worldwide occurrence of toxic cyanobacterial blooms and their numerous harmful effects have instigated extensive research into the environmental conditions promoting such events. Among the environmental factors which have been suggested to influence the increase in cyanobacterial proliferation, nutrient levels have been identified as one of the most prominent, affecting the growth and toxic metabolite production of cyano?bacteria in freshwater ecosystems. In the present study, toxicity of the cyanobacterial strain Microcystis PCC 7806 was evaluated after growth in media with three different nitrogen concentrations. The toxicity of intracellular extracts was analyzed during different growth phases (after 7, 21, and 35 days of cultivation) by observing mortality rates in the Artemia salina bioassay after 24h and 48h of exposure. The results have not shown significantly higher mortality levels between the test organisms exposed to extracts obtained from the cultures grown in the presence of higher nitrogen content (1.5 g/l and 0.8 g/l) and those grown in a nitrogen-free medium. A dose dependent effect, however, can be observed in most cases, with the most substantial changes observed in the high-dose groups. Also, the toxic effects and larval mortality increased during the exposure, suggesting the time-dependent toxicity. Extracts obtained after longer periods of cultivation (21 and 35 days) had stronger effects on the test organisms, which indicates that the toxicity of the tested cyanobacterial strain depends on the specific growth phase.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371400","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}
Biljana Kiprovski, D. Malencic, J. Luković, P. Boža
The purpose of this study was to analyze antioxidant systems among three invasive ragweed species, Ambrosia artemisiifolia L., A. trifida L. and Iva xanthifolia Nutt. Antioxidant capacity could be a possible marker of adaptation to variable environmen?tal conditions, since change in amount of antioxidants represents one of the first responses to various environmental stimuli. Among investigated ragweeds, I. xanthifolia leaves had more pronounced guaiacol peroxidase activity (87.5 and 62.5%) and reduced glutathione content (2.3 and 28.8%) than A. artemisiifolia and A. trifida, respectively. However, super?oxide dismutase activity was invariable in all investigated plants (234.1-247.5 U g-1 fresh weight). The highest content of total phenolics, tannins, flavonoids and proanthocyanidins were detected in A. trifida leaves (up to 3.7 - fold the amount of the others). According to antioxidant activity tests, investigated ragweed species could be presented in a scale: A. trifida > I. xanthifolia > A. artemisiifolia. Accumulation of non-enzymatic antioxidants and lower content of reduced glutathione point to different oxidative stress avoidance strategies of A. trifida when compared to A. artemisiifolia and I. xanthifolia within the same environ?mental conditions.
{"title":"Antioxidant potential of ragweeds: Ambrosia artemisiifolia, A. trifida and Iva xanthifolia","authors":"Biljana Kiprovski, D. Malencic, J. Luković, P. Boža","doi":"10.2298/zmspn1936155k","DOIUrl":"https://doi.org/10.2298/zmspn1936155k","url":null,"abstract":"The purpose of this study was to analyze antioxidant systems among three invasive ragweed species, Ambrosia artemisiifolia L., A. trifida L. and Iva xanthifolia Nutt. Antioxidant capacity could be a possible marker of adaptation to variable environmen?tal conditions, since change in amount of antioxidants represents one of the first responses to various environmental stimuli. Among investigated ragweeds, I. xanthifolia leaves had more pronounced guaiacol peroxidase activity (87.5 and 62.5%) and reduced glutathione content (2.3 and 28.8%) than A. artemisiifolia and A. trifida, respectively. However, super?oxide dismutase activity was invariable in all investigated plants (234.1-247.5 U g-1 fresh weight). The highest content of total phenolics, tannins, flavonoids and proanthocyanidins were detected in A. trifida leaves (up to 3.7 - fold the amount of the others). According to antioxidant activity tests, investigated ragweed species could be presented in a scale: A. trifida > I. xanthifolia > A. artemisiifolia. Accumulation of non-enzymatic antioxidants and lower content of reduced glutathione point to different oxidative stress avoidance strategies of A. trifida when compared to A. artemisiifolia and I. xanthifolia within the same environ?mental conditions.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371441","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}
J. Petrović, I. Stojanov, Vera Gusman, J. Lekić, Mirjana Štrbac, R. Ratajac, S. Medić
Enteritis campylobacterialis has an increasing trend in Serbia. Human illness usually appears as sporadic case, most commonly in children with obvious seasonality. In registered outbreaks, incriminated food was most frequently poultry meat. Campylobacter is one of the most important food borne pathogens, commonly underreported, mostly because isolation of this bacteria requires specific equipment. Since 1 January 2019, monitoring of Campylobacter in poultry carcasses is mandatory when it comes to poultry production fa?cilities in Serbia. The aim of this paper was to analyze data from Autonomous Province of Vojvodina about the prevalence of Campylobacter spp. in poultry meat and risk for human illness. Our results indicate high prevalence of Campylobacter spp. in whole food chain: poultry farms, slaughterhouses, retail and, correspondingly, high risk for consumers in Vojvodina. Measures for risk reduction of disease incidence include better bio security measures on the farm level as a main source of pathogen but also introduction of Campylo?bacter diagnostic equipment in all human diagnostic and food control laboratories.
{"title":"Campylobacter in food production chain in Vojvodina province (Serbia)","authors":"J. Petrović, I. Stojanov, Vera Gusman, J. Lekić, Mirjana Štrbac, R. Ratajac, S. Medić","doi":"10.2298/zmspn1936023p","DOIUrl":"https://doi.org/10.2298/zmspn1936023p","url":null,"abstract":"Enteritis campylobacterialis has an increasing trend in Serbia. Human illness usually appears as sporadic case, most commonly in children with obvious seasonality. In registered outbreaks, incriminated food was most frequently poultry meat. Campylobacter is one of the most important food borne pathogens, commonly underreported, mostly because isolation of this bacteria requires specific equipment. Since 1 January 2019, monitoring of Campylobacter in poultry carcasses is mandatory when it comes to poultry production fa?cilities in Serbia. The aim of this paper was to analyze data from Autonomous Province of Vojvodina about the prevalence of Campylobacter spp. in poultry meat and risk for human illness. Our results indicate high prevalence of Campylobacter spp. in whole food chain: poultry farms, slaughterhouses, retail and, correspondingly, high risk for consumers in Vojvodina. Measures for risk reduction of disease incidence include better bio security measures on the farm level as a main source of pathogen but also introduction of Campylo?bacter diagnostic equipment in all human diagnostic and food control laboratories.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68370931","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}
M. Putnik-Delić, M. Daničić, Tanja Vujanov, R. Kastori
The experiment was carried out in order to examine whether relatively low concentrations of NaCl (0.2, 0.6 and 1.2 g NaCl/L in the nutrient solution), which may appear in agricultural soils or irrigation waters, affect physiological processes in young rapeseed plants (cultivar Slavica) grown under semi-controlled conditions, on a nutrient solution. The experiment was done in 7 replications, with 8 plants per replication. Increased salinity had no influence on adaxial density of stomata, while abaxial density of stomata and specific leaf area declined with an increase in NaCl concentration in the nutrient solution. The intensity of transpiration also declined with an increase in NaCl concentration in the nutrient solution. Even though plant growth was not significantly affected by applied concentrations of NaCl, it is evident that the impact of salts is complex and it is necessary to study whether there are significant changes in plant metabolism.
本试验旨在研究农业土壤或灌溉水中较低浓度的NaCl(0.2、0.6和1.2 g NaCl/L)在半控制条件下对斯拉维卡(Slavica)油菜幼苗生长的生理过程的影响。试验共7个重复，每个重复8株。盐度升高对气孔正面密度无影响，而气孔背面密度和比叶面积随营养液中NaCl浓度的升高而下降。随着营养液中NaCl浓度的增加，蒸腾强度也呈下降趋势。尽管施用NaCl浓度对植物生长没有显著影响，但显然盐的影响是复杂的，有必要研究植物代谢是否有显著变化。
{"title":"Effect of low NaCl concentrations on the water relations of rapeseed","authors":"M. Putnik-Delić, M. Daničić, Tanja Vujanov, R. Kastori","doi":"10.2298/zmspn1937067p","DOIUrl":"https://doi.org/10.2298/zmspn1937067p","url":null,"abstract":"The experiment was carried out in order to examine whether relatively low concentrations of NaCl (0.2, 0.6 and 1.2 g NaCl/L in the nutrient solution), which may appear in agricultural soils or irrigation waters, affect physiological processes in young rapeseed plants (cultivar Slavica) grown under semi-controlled conditions, on a nutrient solution. The experiment was done in 7 replications, with 8 plants per replication. Increased salinity had no influence on adaxial density of stomata, while abaxial density of stomata and specific leaf area declined with an increase in NaCl concentration in the nutrient solution. The intensity of transpiration also declined with an increase in NaCl concentration in the nutrient solution. Even though plant growth was not significantly affected by applied concentrations of NaCl, it is evident that the impact of salts is complex and it is necessary to study whether there are significant changes in plant metabolism.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68371947","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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