Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511077
H. Wallace, L. Lee
SummaryThe effects of pollen source on fruit set and fruit quality characteristics (xenia effects) were examined in three commercial cultivars of mandarin, Imperial, Ellenor, and Murcott. Six trees of each cultivar received six pollination treatments: three cross-pollen sources, self-pollination, bagging and bagging with emasculation. Pollen tube growth, percentage fruit set, fruit weight, seediness, sugar and acid content were assessed in all treatments. Significant xenia effects, including effects on sugar content, were found in all cultivars. `Imperial' was found to be self-incompatible as self-pollen tubes were inhibited in the upper style. This resulted in a lower fruit set in self-pollinated fruits (P<0.01), a very low fruit weight (33–55 g, compared with 92–103 g, P<0.01), and fruits containing few or no seeds. In addition, `Ellenor' and `Murcott' pollen significantly increased sugar content of fruit by between 0.9–1.6% compared with self-pollinated and unpollinated treatments (P<0.05). Widespread ...
{"title":"Pollen source, fruit set and xenia in mandarins","authors":"H. Wallace, L. Lee","doi":"10.1080/14620316.1999.11511077","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511077","url":null,"abstract":"SummaryThe effects of pollen source on fruit set and fruit quality characteristics (xenia effects) were examined in three commercial cultivars of mandarin, Imperial, Ellenor, and Murcott. Six trees of each cultivar received six pollination treatments: three cross-pollen sources, self-pollination, bagging and bagging with emasculation. Pollen tube growth, percentage fruit set, fruit weight, seediness, sugar and acid content were assessed in all treatments. Significant xenia effects, including effects on sugar content, were found in all cultivars. `Imperial' was found to be self-incompatible as self-pollen tubes were inhibited in the upper style. This resulted in a lower fruit set in self-pollinated fruits (P<0.01), a very low fruit weight (33–55 g, compared with 92–103 g, P<0.01), and fruits containing few or no seeds. In addition, `Ellenor' and `Murcott' pollen significantly increased sugar content of fruit by between 0.9–1.6% compared with self-pollinated and unpollinated treatments (P<0.05). Widespread ...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"82-86"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511077","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60220706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511088
K. Antonius-Klemola
SummaryMolecular markers and their utilization in Rubus L. research and breeding are briefly reviewed, and some new potential applications are suggested. Several distinct marker methods have been tested, including chromatographical analyses of pigment molecules, electrophoresis of polymorphic proteins and a wide variety of DNA markers. Such markers have been employed in cultivar and hybrid identification, estimation of genetic similarities, taxonomy, and population genetics studies of various Rubus species as well as their pest organisms. Some differentially expressed genes have been tagged with cDNA probes which may in future be used as genetic markers to aid selection in breeding programmes. No genome mapping work has yet been reported on Rubus, but genetic linkage data of several other fruit and nut species in the Rosaceae have been evaluated for mapping purposes.
{"title":"Molecular markers in Rubus (Rosaceae) research and breeding","authors":"K. Antonius-Klemola","doi":"10.1080/14620316.1999.11511088","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511088","url":null,"abstract":"SummaryMolecular markers and their utilization in Rubus L. research and breeding are briefly reviewed, and some new potential applications are suggested. Several distinct marker methods have been tested, including chromatographical analyses of pigment molecules, electrophoresis of polymorphic proteins and a wide variety of DNA markers. Such markers have been employed in cultivar and hybrid identification, estimation of genetic similarities, taxonomy, and population genetics studies of various Rubus species as well as their pest organisms. Some differentially expressed genes have been tagged with cDNA probes which may in future be used as genetic markers to aid selection in breeding programmes. No genome mapping work has yet been reported on Rubus, but genetic linkage data of several other fruit and nut species in the Rosaceae have been evaluated for mapping purposes.","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"149-160"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60221367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511125
M. Goldway, Osnat Shai, H. Yehuda, A. Matityahu, R. Stern
Summary`Topred' is one of the main apple cultivars in Israel. Since `Topred' exhibits full self incompatibility, its fruit production is totally dependent on cross pollination. The two commercial pollenizers of `Topred' in Israel are `Golden Delicious' and `Jonathan'. In the study presented here, the potential of these two pollenizers was determined. In two consecutive seasons, it was found that the rate of fruit-set and fruit yield were significantly higher in the rows of `Topred' adjacent to the `Golden Delicious' as compared with the rows adjacent to the `Jonathan'. PCR analysis of the S-alleles, a polymorphic gene locus, determining the outcome of pollination, revealed that `Jonathan' and `Topred' share allele S9. PCR-S-allele analysis of progeny seedlings revealed that in `Jonathan' only S7, the unshared allele, took part in fertilization, whereas both alleles of `Golden Delicious' (S2,S3) participated at equal rates. Thus, the lower potency of `Jonathan' as a pollenizer of `Topred' is due, at least ...
{"title":"`Jonathan' apple is a lower-potency pollenizer of `Topred' than `Golden Delicious' due to partial S-allele incompatibility","authors":"M. Goldway, Osnat Shai, H. Yehuda, A. Matityahu, R. Stern","doi":"10.1080/14620316.1999.11511125","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511125","url":null,"abstract":"Summary`Topred' is one of the main apple cultivars in Israel. Since `Topred' exhibits full self incompatibility, its fruit production is totally dependent on cross pollination. The two commercial pollenizers of `Topred' in Israel are `Golden Delicious' and `Jonathan'. In the study presented here, the potential of these two pollenizers was determined. In two consecutive seasons, it was found that the rate of fruit-set and fruit yield were significantly higher in the rows of `Topred' adjacent to the `Golden Delicious' as compared with the rows adjacent to the `Jonathan'. PCR analysis of the S-alleles, a polymorphic gene locus, determining the outcome of pollination, revealed that `Jonathan' and `Topred' share allele S9. PCR-S-allele analysis of progeny seedlings revealed that in `Jonathan' only S7, the unshared allele, took part in fertilization, whereas both alleles of `Golden Delicious' (S2,S3) participated at equal rates. Thus, the lower potency of `Jonathan' as a pollenizer of `Topred' is due, at least ...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"381-385"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60224288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511134
H. Mactavish, R. C. Menary
SummaryOxygen consumption in boronia flowers after harvest was correlated with production of volatiles. In some cases, exogenously applied respiratory inhibitors (NaN3, 2 mM and KCN, 100 mM and 3 mM) were not present in sufficient quantities to inhibit respiration, and yet production of volatiles was inhibited: indicating the action of cytoplasmic enzymes in the conversion of precursors into volatiles after harvest. Post-harvest respiration, whether via normal or alternative pathways, is a requirement for production of volatiles. Production of volatiles concurrent with activation of the alternative pathway may suggest that ATP may not be required. Large buds and open flowers consume three times as much oxygen as smaller buds after harvest: one reason for the reduced amounts of volatiles produced after harvest in small and medium sized buds, and in early stages of flowering.
{"title":"Production of volatiles in brown boronia flowers after harvest. II: Effect of oxygen consumption","authors":"H. Mactavish, R. C. Menary","doi":"10.1080/14620316.1999.11511134","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511134","url":null,"abstract":"SummaryOxygen consumption in boronia flowers after harvest was correlated with production of volatiles. In some cases, exogenously applied respiratory inhibitors (NaN3, 2 mM and KCN, 100 mM and 3 mM) were not present in sufficient quantities to inhibit respiration, and yet production of volatiles was inhibited: indicating the action of cytoplasmic enzymes in the conversion of precursors into volatiles after harvest. Post-harvest respiration, whether via normal or alternative pathways, is a requirement for production of volatiles. Production of volatiles concurrent with activation of the alternative pathway may suggest that ATP may not be required. Large buds and open flowers consume three times as much oxygen as smaller buds after harvest: one reason for the reduced amounts of volatiles produced after harvest in small and medium sized buds, and in early stages of flowering.","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"440-442"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511134","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60224404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511137
D. Mccall, J. Willumsen
SummaryThe effect of nitrogen availability and low level supplementary light on the growth and nitrate content of butterhead lettuce (Lactuca sativa var. capitata L.) grown in soil under greenhouse conditions in winter was studied. No significant interactions between nitrogen availability and supplementary light on yield, nitrate content, osmotic potential of expressed leaf sap and component osmotica were found. Supplementary light greatly increased plant growth and resulted in earlier harvest. When harvested with similar fresh weights, plant nitrate content was significantly reduced by supplementary light although the effect was slight. The reduced contribution of nitrate to sap osmotic potential at the higher light level was accompanied by a significant increase in the contribution of sucrose. While plant fresh weight was unaffected by the rate of nitrogen application, a positive correlation between nitrate content and nitrogen application rate was found. Reduced nitrate content at low nitrogen applicat...
{"title":"Effects of nitrogen availability and supplementary light on the nitrate content of soil-grown lettuce","authors":"D. Mccall, J. Willumsen","doi":"10.1080/14620316.1999.11511137","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511137","url":null,"abstract":"SummaryThe effect of nitrogen availability and low level supplementary light on the growth and nitrate content of butterhead lettuce (Lactuca sativa var. capitata L.) grown in soil under greenhouse conditions in winter was studied. No significant interactions between nitrogen availability and supplementary light on yield, nitrate content, osmotic potential of expressed leaf sap and component osmotica were found. Supplementary light greatly increased plant growth and resulted in earlier harvest. When harvested with similar fresh weights, plant nitrate content was significantly reduced by supplementary light although the effect was slight. The reduced contribution of nitrate to sap osmotic potential at the higher light level was accompanied by a significant increase in the contribution of sucrose. While plant fresh weight was unaffected by the rate of nitrogen application, a positive correlation between nitrate content and nitrogen application rate was found. Reduced nitrate content at low nitrogen applicat...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"8 1","pages":"458-463"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60224624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511141
T. Suojala
SummaryStorage loss may adversely affect a considerable proportion of the carrot yield taken to the store. The present study aimed to determine the optimum harvest time to minimize storage losses. Experiments with two cultivars (Fontana F1 and Panther F1) were performed at an experimental site and on farms for three years. Delaying harvest decreased storage losses which mainly comprised spoilage due to storage diseases. Infections by the two major pathogens, Mycocentrospora acerina and Botrytis cinerea, were reduced towards the end of the harvest period. No further improvement in storability was observed after early October, but storage losses did not increase with a later harvest in most cases. Changes in storability were generally not related to weather conditions at or prior to harvest. Only the continuous frost at the very end of October in one season impaired storage quality.
{"title":"EFFECT OF HARVEST TIME ON THE STORAGE PERFORMANCE OF CARROT","authors":"T. Suojala","doi":"10.1080/14620316.1999.11511141","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511141","url":null,"abstract":"SummaryStorage loss may adversely affect a considerable proportion of the carrot yield taken to the store. The present study aimed to determine the optimum harvest time to minimize storage losses. Experiments with two cultivars (Fontana F1 and Panther F1) were performed at an experimental site and on farms for three years. Delaying harvest decreased storage losses which mainly comprised spoilage due to storage diseases. Infections by the two major pathogens, Mycocentrospora acerina and Botrytis cinerea, were reduced towards the end of the harvest period. No further improvement in storability was observed after early October, but storage losses did not increase with a later harvest in most cases. Changes in storability were generally not related to weather conditions at or prior to harvest. Only the continuous frost at the very end of October in one season impaired storage quality.","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"484-492"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511141","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60225214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511177
P. G. Lez-Altozano, J. Castel
SummaryAn experiment on Regulated Deficit Irrigation (RDI) was performed during 1995 and 1996 in a ten year old, drip-irrigated `Clementina de Nules' mandarin orchard in Moncada, Spain. Treatments consisted of a control, where irrigation was applied without restriction during the whole year at 125% ETlys and RDI treatments where irrigation was reduced to 25% or to 50% of crop evapotranspiration measured by a weighing lysimeter (ETlys) during one of the following periods: I) flowering and fruit set (spring, 20 March to 3 July in 1995, and 1 April to 1 July in 1996); II) initial fruit enlargement phase (summer, 4 July to 7 August in 1995, and 2 to 28 July in 1996), and III) final fruit growth and maturation phases (end of summer–autumn, 8 August in 1995, and 29 July in 1996 to harvest). An additional treatment, denominated 50%–Year, was irrigated at 50% ETlys during the whole year. The effects of the treatments on yield and fruit quality in relation to tree water status (pre-dawn (ca) and midday (cmd) leaf ...
1995年和1996年，在西班牙蒙卡达一个10年的滴灌“Clementina de Nules”柑橘果园进行了调节亏缺灌溉(RDI)试验。处理包括一个对照，全年无限制地以125%的ETlys灌水和RDI处理，在下列一个时期灌水量减少到作物蒸散量的25%或50% (ETlys): 1)开花和坐果(1995年3月20日至7月3日春季和1996年4月1日至7月1日春季);II)最初的果实扩大阶段(夏季，1995年7月4日至8月7日，1996年7月2日至28日)，III)最后的果实生长和成熟阶段(夏秋结束，1995年8月8日，1996年7月29日收获)。另外一个处理，命名为50% year，全年以50% etly灌溉。不同处理对产量和果实品质的影响与树木水分状况(黎明前(ca)和中午(cmd))有关。
{"title":"Regulated deficit irrigation in `Clementina de Nules' citrus trees. I. Yield and fruit quality effects","authors":"P. G. Lez-Altozano, J. Castel","doi":"10.1080/14620316.1999.11511177","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511177","url":null,"abstract":"SummaryAn experiment on Regulated Deficit Irrigation (RDI) was performed during 1995 and 1996 in a ten year old, drip-irrigated `Clementina de Nules' mandarin orchard in Moncada, Spain. Treatments consisted of a control, where irrigation was applied without restriction during the whole year at 125% ETlys and RDI treatments where irrigation was reduced to 25% or to 50% of crop evapotranspiration measured by a weighing lysimeter (ETlys) during one of the following periods: I) flowering and fruit set (spring, 20 March to 3 July in 1995, and 1 April to 1 July in 1996); II) initial fruit enlargement phase (summer, 4 July to 7 August in 1995, and 2 to 28 July in 1996), and III) final fruit growth and maturation phases (end of summer–autumn, 8 August in 1995, and 29 July in 1996 to harvest). An additional treatment, denominated 50%–Year, was irrigated at 50% ETlys during the whole year. The effects of the treatments on yield and fruit quality in relation to tree water status (pre-dawn (ca) and midday (cmd) leaf ...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"706-713"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60226956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511189
Y. Kano, R. Nagata
SummaryThe rooting abilities of the filamentous virus infected and the virus-free cuttings of sweet potato (Ipomoea batatas Poir.) were compared, with an anatomical comparison of the root. The diameters of the pith and the vascular bundle cylinder at the node of the virus-free cutting were larger than in those of virus infected ones. Thicker and more vigorous roots were initiated in the virus-free cutting. The diameter of the central cylinder and the thickness of the cortical layer of the root were larger in the virus-free cutting than in the virus infected one. Larger and more numerous vessels developed, and larger and more distinct meristematic tissues surrounding the protophloem poles also developed in a fan form in the root of the virus-free cutting. The weight of the leaf and stem of the plant 80.d after planting in the field were larger in the virus-free cutting than in the virus infected cutting. From these results, the following assumptions on roots in the virus-free cutting can be made. Thicker r...
{"title":"Comparison of the rooting ability of virus infected and virus-free cuttings of sweet potatoes (Ipomoea batatas Poir.) and an anatomical comparison of the roots","authors":"Y. Kano, R. Nagata","doi":"10.1080/14620316.1999.11511189","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511189","url":null,"abstract":"SummaryThe rooting abilities of the filamentous virus infected and the virus-free cuttings of sweet potato (Ipomoea batatas Poir.) were compared, with an anatomical comparison of the root. The diameters of the pith and the vascular bundle cylinder at the node of the virus-free cutting were larger than in those of virus infected ones. Thicker and more vigorous roots were initiated in the virus-free cutting. The diameter of the central cylinder and the thickness of the cortical layer of the root were larger in the virus-free cutting than in the virus infected one. Larger and more numerous vessels developed, and larger and more distinct meristematic tissues surrounding the protophloem poles also developed in a fan form in the root of the virus-free cutting. The weight of the leaf and stem of the plant 80.d after planting in the field were larger in the virus-free cutting than in the virus infected cutting. From these results, the following assumptions on roots in the virus-free cutting can be made. Thicker r...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"785-790"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60227303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511188
S. Mancuso, F. Ferrini, F. Nicese
SummaryThe potential use of the artificial neural networks (ANNs) for characterization and identification of seventeen chestnut (Castanea sativa Mill.) accessions, belonging to the ``marrone''-type and ``chestnut''-type, was investigated in genotypes originating from regions of Italy. Different back-propagation neural networks (BPNN) were built on the basis of image analysis parameters of the leaves, for two tasks of chestnut classification. In the first case a BPNN was built and trained to differentiate the 17 accessions of chestnut. In the second case a BPNN was conceived to distinguish between the ``marrone'' and ``chestnut'' types. BPNN produced a clear identification of all the accessions except in the case of `Garrone nero', `Garrone rosso' and `Tempuriva', which showed almost the same output diagram. Cluster analysis separated the 17 chestnut genotypes into four main groups whose differences were related to the original sources of the genotypes and to the type of affiliation (``marrone''-type or ``...
{"title":"CHESTNUT (CASTANEA SATIVA MILL.) GENOTYPE IDENTIFICATION: AN ARTIFICIAL NEURAL NETWORK APPROACH","authors":"S. Mancuso, F. Ferrini, F. Nicese","doi":"10.1080/14620316.1999.11511188","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511188","url":null,"abstract":"SummaryThe potential use of the artificial neural networks (ANNs) for characterization and identification of seventeen chestnut (Castanea sativa Mill.) accessions, belonging to the ``marrone''-type and ``chestnut''-type, was investigated in genotypes originating from regions of Italy. Different back-propagation neural networks (BPNN) were built on the basis of image analysis parameters of the leaves, for two tasks of chestnut classification. In the first case a BPNN was built and trained to differentiate the 17 accessions of chestnut. In the second case a BPNN was conceived to distinguish between the ``marrone'' and ``chestnut'' types. BPNN produced a clear identification of all the accessions except in the case of `Garrone nero', `Garrone rosso' and `Tempuriva', which showed almost the same output diagram. Cluster analysis separated the 17 chestnut genotypes into four main groups whose differences were related to the original sources of the genotypes and to the type of affiliation (``marrone''-type or ``...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"50 1","pages":"777-784"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60227660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511062
B. Aloni, L. Karni, S. Moreshet, C. Yao, C. Stanghellini
SummaryThe objective of this research was to study the role of fruit expansion and turgor in the formation of cuticular cracking in bell pepper (Capsicum annuum L.). Fruit was artificially cracked by filling detached hollowed pepper fruits with distilled water. However, when isotonic mannitol solution was used, cracking did not occur. Similarly, immersion of intact red fruits in tap water caused formation of cuticular cracks following a delay of 30 h during which the turgor potential of the red pericarp and the expansion of the fruit diameter increased to critical threshold values of 0.65 MPa and 1±2%, respectively. On the other hand, in the greenhouse, attached red fruits underwent diameter change of only 0.2% and, when most expanded, the fruit had a turgor potential of only 0.3 MPa. In greenhouse grown plants, pepper fruits become susceptible to cracking at the stage of colour turning, a stage at which they also become susceptible to artificially induced cracking by immersion in water. Under greenhouse ...
{"title":"Cuticular cracking in bell pepper fruit: II. Effects of fruit water relations and fruit expansion","authors":"B. Aloni, L. Karni, S. Moreshet, C. Yao, C. Stanghellini","doi":"10.1080/14620316.1999.11511062","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511062","url":null,"abstract":"SummaryThe objective of this research was to study the role of fruit expansion and turgor in the formation of cuticular cracking in bell pepper (Capsicum annuum L.). Fruit was artificially cracked by filling detached hollowed pepper fruits with distilled water. However, when isotonic mannitol solution was used, cracking did not occur. Similarly, immersion of intact red fruits in tap water caused formation of cuticular cracks following a delay of 30 h during which the turgor potential of the red pericarp and the expansion of the fruit diameter increased to critical threshold values of 0.65 MPa and 1±2%, respectively. On the other hand, in the greenhouse, attached red fruits underwent diameter change of only 0.2% and, when most expanded, the fruit had a turgor potential of only 0.3 MPa. In greenhouse grown plants, pepper fruits become susceptible to cracking at the stage of colour turning, a stage at which they also become susceptible to artificially induced cracking by immersion in water. Under greenhouse ...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":"74 1","pages":"1-5"},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60219509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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