Pub Date : 1999-01-01DOI: 10.1080/14620316.1999.11511109
H. Daugaard, J. Grauslund
SummaryTo improve the quality of `Mutsu' apples after storage, relationships were studied between various orchard factors and fruit quality in an orchard survey performed in 1996 and 1997. Quality aspects included were fruit colour as related to fruit firmness and contents of starch, sugar and acid. Fruit colour was strongly correlated with firmness and sugar content, whereas starch and acid content correlations were not consistent from green to intermediate and yellow fruit. Compared with 1996, yields were higher and the development of fruit colour poorer in 1997, probably caused by climatic variations. No correlations were found between ratings for tree density, tree vigour and tree openness vs. fruit colour, whereas crop load was highly correlated to both green, intermediate and yellow fruit colour, respectively. In addition, significant correlations were found between leaf N, leaf K, and fruit colour. It is suggested that possible cultural practices for obtaining good fruit quality of `Mutsu', therefo...
{"title":"Fruit colour and correlations with orchard factors and post-harvest characteristics in apple cv. Mutsu","authors":"H. Daugaard, J. Grauslund","doi":"10.1080/14620316.1999.11511109","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511109","url":null,"abstract":"SummaryTo improve the quality of `Mutsu' apples after storage, relationships were studied between various orchard factors and fruit quality in an orchard survey performed in 1996 and 1997. Quality aspects included were fruit colour as related to fruit firmness and contents of starch, sugar and acid. Fruit colour was strongly correlated with firmness and sugar content, whereas starch and acid content correlations were not consistent from green to intermediate and yellow fruit. Compared with 1996, yields were higher and the development of fruit colour poorer in 1997, probably caused by climatic variations. No correlations were found between ratings for tree density, tree vigour and tree openness vs. fruit colour, whereas crop load was highly correlated to both green, intermediate and yellow fruit colour, respectively. In addition, significant correlations were found between leaf N, leaf K, and fruit colour. It is suggested that possible cultural practices for obtaining good fruit quality of `Mutsu', therefo...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60223254","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: 10.1080/14620316.1999.11511133
H. Mactavish, R. C. Menary
SummaryThe potential for enhanced concentrations of essential oils (solvent-extracted floral products) in flowers from four genetically distinct clones of brown boronia (Boronia megastigma Nees) as a result of post-harvest incubation was assessed. Flowers were sampled throughout 48 h of incubation at 12 and 308C. There was significant variation in the changes observed between clones. Increases in the concentration of floral extract as a result of incubation varied from 3% to 19%, the maximum concentration of floral extract observed was 2.13% (dry-weight basis). The volatile portion of the extract increased by between 25 and 117%, and the concentration of b-ionone, the main volatile of interest, increased by between 45 and 181%. The maximum concentration of total volatiles observed was 0.47%, and of b-ionone, 0.165%; all values being expressed as a percentage of dry flower weight. The most significant increase in floral extract, total volatiles and b-ionone after harvest, occurred in clone 250. Increases i...
{"title":"Production of volatiles in brown boronia flowers after harvest. I: Effect of clonal type and incubation temperature","authors":"H. Mactavish, R. C. Menary","doi":"10.1080/14620316.1999.11511133","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511133","url":null,"abstract":"SummaryThe potential for enhanced concentrations of essential oils (solvent-extracted floral products) in flowers from four genetically distinct clones of brown boronia (Boronia megastigma Nees) as a result of post-harvest incubation was assessed. Flowers were sampled throughout 48 h of incubation at 12 and 308C. There was significant variation in the changes observed between clones. Increases in the concentration of floral extract as a result of incubation varied from 3% to 19%, the maximum concentration of floral extract observed was 2.13% (dry-weight basis). The volatile portion of the extract increased by between 25 and 117%, and the concentration of b-ionone, the main volatile of interest, increased by between 45 and 181%. The maximum concentration of total volatiles observed was 0.47%, and of b-ionone, 0.165%; all values being expressed as a percentage of dry flower weight. The most significant increase in floral extract, total volatiles and b-ionone after harvest, occurred in clone 250. Increases i...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60224578","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: 10.1080/14620316.1999.11511143
C. Rinallo, L. Mittempergher, G. Frugis, D. Mariotti
SummaryElm clones may be propagated by grafting, but graft incompatibility is a major problem. Rooting by cuttings does not always give satisfactory results. Shoots of elm clones resistant to Dutch Elm Disease (caused by Ophiostoma ulmi Buism.) and with poor rooting ability, were air layered after one of the following five treatments: application of growth regulator mixture; inoculation with Agrobacterium rhizogenes wild type 1855 (A.r. 1855) or Agrobacterium tumefaciens-ORF11 (A.t. ORF11); application of growth regulator mixture and inoculation with A.r. 1855 or A.t. ORF11. Shoots treated only with growth regulators exhibited low percentage of rooting; shoots inoculated with only Agrobacterium strains produced very low percentage of rooting; shoots treated with growth regulator and inoculated with Agrobacterium strains exhibited the best percentage of rooting. The results demonstrated the possibility of rooting of these recalcitrant clones, with clear advantage for the propagation of elm clones with grow...
{"title":"Clonal propagation in the genus Ulmus: Improvement of rooting ability by Agrobacterium rhizogenes T-DNA genes","authors":"C. Rinallo, L. Mittempergher, G. Frugis, D. Mariotti","doi":"10.1080/14620316.1999.11511143","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511143","url":null,"abstract":"SummaryElm clones may be propagated by grafting, but graft incompatibility is a major problem. Rooting by cuttings does not always give satisfactory results. Shoots of elm clones resistant to Dutch Elm Disease (caused by Ophiostoma ulmi Buism.) and with poor rooting ability, were air layered after one of the following five treatments: application of growth regulator mixture; inoculation with Agrobacterium rhizogenes wild type 1855 (A.r. 1855) or Agrobacterium tumefaciens-ORF11 (A.t. ORF11); application of growth regulator mixture and inoculation with A.r. 1855 or A.t. ORF11. Shoots treated only with growth regulators exhibited low percentage of rooting; shoots inoculated with only Agrobacterium strains produced very low percentage of rooting; shoots treated with growth regulator and inoculated with Agrobacterium strains exhibited the best percentage of rooting. The results demonstrated the possibility of rooting of these recalcitrant clones, with clear advantage for the propagation of elm clones with grow...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60224826","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: 10.1080/14620316.1999.11511144
F. Wachira, W. Ng’etich
SummaryThe effects of polyploidy on yield, total dry-matter production and partitioning of tea were studied in diploid (23), triploid (33) and tetraploid (43) tea (Camellia sinensis). Although increased ploidy depressed yield significantly (P<0.05), significant differences in productivity were noted among genotypes of the same ploidy level and some triploids even outyielded some diploids which indicated the potential for selecting and/or developing high yielding polyploid clones. After 60 months of growth, the clones had accumulated 20±53 tonnes of dry matter per hectare. Diploids accumulated significantly higher total biomass than the polyploids. Between 25 and 40% of total accumulated dry matter was partitioned into leaves. Polyploids had a large proportion of unplucked leaves which indicated that their productivity could be improved by plucking older leaves with the bud (coarse plucking) or by more frequent plucking. Between 13 and 32% of the total dry matter was partitioned into the root system. The h...
{"title":"Dry-matter production and partition in diploid, triploid and tetraploid tea","authors":"F. Wachira, W. Ng’etich","doi":"10.1080/14620316.1999.11511144","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511144","url":null,"abstract":"SummaryThe effects of polyploidy on yield, total dry-matter production and partitioning of tea were studied in diploid (23), triploid (33) and tetraploid (43) tea (Camellia sinensis). Although increased ploidy depressed yield significantly (P<0.05), significant differences in productivity were noted among genotypes of the same ploidy level and some triploids even outyielded some diploids which indicated the potential for selecting and/or developing high yielding polyploid clones. After 60 months of growth, the clones had accumulated 20±53 tonnes of dry matter per hectare. Diploids accumulated significantly higher total biomass than the polyploids. Between 25 and 40% of total accumulated dry matter was partitioned into leaves. Polyploids had a large proportion of unplucked leaves which indicated that their productivity could be improved by plucking older leaves with the bud (coarse plucking) or by more frequent plucking. Between 13 and 32% of the total dry matter was partitioned into the root system. The h...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511144","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60224839","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: 10.1080/14620316.1999.11511148
Sylvia Adjoa Mitchell, M. H. Ahmad
SummarySuccessful use of tissue culture to propagate Dioscorea spp. depends on maximizing subsequent growth in vivo. This paper describes the growth of in vitro plantlets of the Jamaican yams D. trifida L. cv. Short Neck Yampie (SNY) and D. cayenensis Lam. cv. Round Leaf Yellow Yam (RLYY) after transfer to in vivo conditions, from day zero (day of transfer) to harvest of the first generation tubers at 314 d, and sprouting of these tubers. As the SNY and RLYY plants grew in vivo, abrupt changes occurred in the type of shoot (changed from type I to type II) and underground organ (from primary nodal complex to tuber), and in the rates of stem and root growth. Gradual changes occurred in the number of roots. The first observable morphological feature of the SNY and RLYY plants to change was the shoot tip. This changed from a lateral position at the node at the base of a terminal leaf (lateral tip), to the shoot apex (apical tip). It is suggested that the change in shoot tip position and associated features ma...
组织培养繁殖薯蓣属植物的成功与否取决于其在体内生长的最大化。本文报道了牙买加山药D. trifida L. cv离体植株的生长情况。短颈山猫(SNY)与卡延山猫(d.c ayenensis Lam)。简历。圆叶黄山药(RLYY)转移到体内条件后，从第0天(转移日)到第314天收获第一代块茎，并发芽。随着SNY和RLYY植株在体内的生长，茎部类型(由I型变为II型)和地下器官类型(由初生节复合体变为块茎)以及茎和根的生长速率都发生了突变。根的数量逐渐发生变化。SNY和RLYY植株变化的第一个形态学特征是茎尖。这从在顶生叶基部的节(侧梢)的侧面位置改变到茎尖(尖尖)。结果表明，针尖位置的变化及其相关特征可能是造成这一现象的主要原因。
{"title":"Morphological changes of Dioscorea trifida cv. Short Neck Yampie and D. cayenensis cv. Round Leaf Yellow Yam linked to the number and size of harvested tubers","authors":"Sylvia Adjoa Mitchell, M. H. Ahmad","doi":"10.1080/14620316.1999.11511148","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511148","url":null,"abstract":"SummarySuccessful use of tissue culture to propagate Dioscorea spp. depends on maximizing subsequent growth in vivo. This paper describes the growth of in vitro plantlets of the Jamaican yams D. trifida L. cv. Short Neck Yampie (SNY) and D. cayenensis Lam. cv. Round Leaf Yellow Yam (RLYY) after transfer to in vivo conditions, from day zero (day of transfer) to harvest of the first generation tubers at 314 d, and sprouting of these tubers. As the SNY and RLYY plants grew in vivo, abrupt changes occurred in the type of shoot (changed from type I to type II) and underground organ (from primary nodal complex to tuber), and in the rates of stem and root growth. Gradual changes occurred in the number of roots. The first observable morphological feature of the SNY and RLYY plants to change was the shoot tip. This changed from a lateral position at the node at the base of a terminal leaf (lateral tip), to the shoot apex (apical tip). It is suggested that the change in shoot tip position and associated features ma...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511148","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60225129","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: 10.1080/14620316.1999.11511166
P. Wilson
SummaryMother plants of one clone of Eucalyptus globulus were grown in a greenhouse in Portugal under different pruning regimes, in pots or communal containers, and at different stockings (crown sizes). Larger plants (at lower stockings) had higher cuttings productivities per plant (cuttings per plant per week) but lower cuttings productivities per area (cuttings per m2 per week). At one stocking, tall and deep-crowned plants had high productivities compared with low plants, but shoot thickness increased with the height of the shoot origin and thick-stemmed cuttings had low initial survival and rooting ability. Root pruning of mother plants temporarily reduced productivity without affecting the propagation traits of cuttings. Rooting was markedly different in two nurseries, reflecting high sensitivity to the environment.
{"title":"Pruning regimes, container types and stockings for mother plants of Eucalyptus globulus Labill. ssp. globulus","authors":"P. Wilson","doi":"10.1080/14620316.1999.11511166","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511166","url":null,"abstract":"SummaryMother plants of one clone of Eucalyptus globulus were grown in a greenhouse in Portugal under different pruning regimes, in pots or communal containers, and at different stockings (crown sizes). Larger plants (at lower stockings) had higher cuttings productivities per plant (cuttings per plant per week) but lower cuttings productivities per area (cuttings per m2 per week). At one stocking, tall and deep-crowned plants had high productivities compared with low plants, but shoot thickness increased with the height of the shoot origin and thick-stemmed cuttings had low initial survival and rooting ability. Root pruning of mother plants temporarily reduced productivity without affecting the propagation traits of cuttings. Rooting was markedly different in two nurseries, reflecting high sensitivity to the environment.","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60226071","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: 10.1080/14620316.1999.11511187
M. Génard, M. Reich, P. Lobit, J. Besset
SummaryThe relationship between peach fruit (Prunus persica L. Batsch) composition and growth was studied in six cultivar-training-site-season combinations. Individual fruit growth and sugar and acid content were measured. The approach combined a functional description of growth and a correlation analysis. Fruit growth was divided into two phases: pit growth with the first stage of the flesh growth, and a second stage of flesh growth. Fruit composition was analysed for the concentrations of sucrose, reducing sugars, malic and citric acids in the flesh. The variability of growth and composition within each combination was high. The variation of composition was mainly related to the variation of growth during the second phase, although the fruit having largest diameters at thinning were often those with the highest citric acid concentration. Fruits growing intensively during the second phase had the highest sucrose and malic acid concentration and the lowest reducing sugar and citric acid concentration. The...
{"title":"Correlations between sugar and acid content and peach growth","authors":"M. Génard, M. Reich, P. Lobit, J. Besset","doi":"10.1080/14620316.1999.11511187","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511187","url":null,"abstract":"SummaryThe relationship between peach fruit (Prunus persica L. Batsch) composition and growth was studied in six cultivar-training-site-season combinations. Individual fruit growth and sugar and acid content were measured. The approach combined a functional description of growth and a correlation analysis. Fruit growth was divided into two phases: pit growth with the first stage of the flesh growth, and a second stage of flesh growth. Fruit composition was analysed for the concentrations of sucrose, reducing sugars, malic and citric acids in the flesh. The variability of growth and composition within each combination was high. The variation of composition was mainly related to the variation of growth during the second phase, although the fruit having largest diameters at thinning were often those with the highest citric acid concentration. Fruits growing intensively during the second phase had the highest sucrose and malic acid concentration and the lowest reducing sugar and citric acid concentration. The...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60227531","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: 10.1080/14620316.1999.11511068
C. R. Rejón, M. Garrido-Ramos, M. R. Rejón
SummaryAfter a cytogenetic and isozymatic analysis of three cultivars of Muscari comosum and its comparison with wild species of the subgenus Leopoldia of the genus Muscari, we conclude that while the two cultivars M. comosum and M. comosum `Plumosum' clearly belong to the species M. comosum (L.) Miller, the third, sold as M. comosum `Epirus Giant', is a different species, possibly M. dionysicum Rech. fil. Therefore, the giant character on which this cultivar is sold is due possibly to a species trait rather than a giant genotype. Furthermore, while M. comosum `Plumosum' is a true genetic clone, the cultivar M. comosum is not, nor is `Epirus Giant'. Finally, we show that all the bulbs of the cultivar M. comosum are heterozygous for the inversion present in the second chromosome pair of this species. We discuss the implications of these findings in relation to the usefulness of studying the genetic variability of cultivated plants with respect of their wild ancestors.
{"title":"Genetic characterization of three cultivars of Muscari comosum (Liliaceae)","authors":"C. R. Rejón, M. Garrido-Ramos, M. R. Rejón","doi":"10.1080/14620316.1999.11511068","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511068","url":null,"abstract":"SummaryAfter a cytogenetic and isozymatic analysis of three cultivars of Muscari comosum and its comparison with wild species of the subgenus Leopoldia of the genus Muscari, we conclude that while the two cultivars M. comosum and M. comosum `Plumosum' clearly belong to the species M. comosum (L.) Miller, the third, sold as M. comosum `Epirus Giant', is a different species, possibly M. dionysicum Rech. fil. Therefore, the giant character on which this cultivar is sold is due possibly to a species trait rather than a giant genotype. Furthermore, while M. comosum `Plumosum' is a true genetic clone, the cultivar M. comosum is not, nor is `Epirus Giant'. Finally, we show that all the bulbs of the cultivar M. comosum are heterozygous for the inversion present in the second chromosome pair of this species. We discuss the implications of these findings in relation to the usefulness of studying the genetic variability of cultivated plants with respect of their wild ancestors.","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60219894","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: 10.1080/14620316.1999.11511075
L. Andersen, P. Brénnum, M. Jensen
SummarySeeds of Fagus sylvatica, Prunus avium and Acer pseudoplatanus were sown on 10 May and covered with four materials: white polyethylene, white polypropylene, yellow net or green net for 90 d to study the effect of a temporary covering on soil and air temperature, increment in dry weight, and root cellular diameter of nursery tree seedlings in a northern climate. Root collar diameter, height and dry weight of covered seedlings were compared with those of uncovered control seedlings at the end of growing season. The increase in soil and air temperature under white polyethylene, white polypropylene and yellow net and the decrease in soil temperature under the green net influenced the growth of F. sylvatica and P. avium seedlings. Dry weight, as well as root collar diameter and height, was increased under the coverings increasing temperature. A. pseudoplatanus responded less to temperature, but increased dry weight and root collar diameter when cultivated under white polypropylene and green net. Hence t...
{"title":"Influence of temporary covers on the growth of nursery tree seedlings","authors":"L. Andersen, P. Brénnum, M. Jensen","doi":"10.1080/14620316.1999.11511075","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511075","url":null,"abstract":"SummarySeeds of Fagus sylvatica, Prunus avium and Acer pseudoplatanus were sown on 10 May and covered with four materials: white polyethylene, white polypropylene, yellow net or green net for 90 d to study the effect of a temporary covering on soil and air temperature, increment in dry weight, and root cellular diameter of nursery tree seedlings in a northern climate. Root collar diameter, height and dry weight of covered seedlings were compared with those of uncovered control seedlings at the end of growing season. The increase in soil and air temperature under white polyethylene, white polypropylene and yellow net and the decrease in soil temperature under the green net influenced the growth of F. sylvatica and P. avium seedlings. Dry weight, as well as root collar diameter and height, was increased under the coverings increasing temperature. A. pseudoplatanus responded less to temperature, but increased dry weight and root collar diameter when cultivated under white polypropylene and green net. Hence t...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511075","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60219978","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: 10.1080/14620316.1999.11511073
N. Sukhvibul, A. W. Whiley, M. Smith, S. E. Hetherington, V. Vithanage
SummaryThe effect of temperature on inflorescence development and sex expression in two mono-embryonic (`Irwin' and `Sensation'), and two poly-embryonic (`Nam Dok Mai' and `Kensington') mango cultivars was studied. Trees were subjected to natural winter temperatures to induce flowering prior to transfer into controlled environment glasshouse rooms under day/night temperature regimes of 15/5, 20/10, 25/15 and 30/208C for 20 weeks. Inflorescence development did not progress when trees were held at 15/58C. Cooler temperatures (20/108C) delayed the start of anthesis (42.4.d) compared with trees grown at 25/158C (23.d) and 30/208C (16.1.d). At 20/108C, the delay in the start of anthesis was greatest for `Sensation' (55.5.d) and least for `Nam Dok Mai' (25.5.d) while at other temperatures there was little difference between cultivars. The distribution of hermaphrodite flowers within the inflorescence was independent of temperature with the highest percentage found in the apical half of the inflorescence. There ...
{"title":"EFFECT OF TEMPERATURE ON INFLORESCENCE DEVELOPMENT AND SEX EXPRESSION OF MONO- AND POLY-EMBRYONIC MANGO (MANGIFERA INDICA L.) CULTIVARS","authors":"N. Sukhvibul, A. W. Whiley, M. Smith, S. E. Hetherington, V. Vithanage","doi":"10.1080/14620316.1999.11511073","DOIUrl":"https://doi.org/10.1080/14620316.1999.11511073","url":null,"abstract":"SummaryThe effect of temperature on inflorescence development and sex expression in two mono-embryonic (`Irwin' and `Sensation'), and two poly-embryonic (`Nam Dok Mai' and `Kensington') mango cultivars was studied. Trees were subjected to natural winter temperatures to induce flowering prior to transfer into controlled environment glasshouse rooms under day/night temperature regimes of 15/5, 20/10, 25/15 and 30/208C for 20 weeks. Inflorescence development did not progress when trees were held at 15/58C. Cooler temperatures (20/108C) delayed the start of anthesis (42.4.d) compared with trees grown at 25/158C (23.d) and 30/208C (16.1.d). At 20/108C, the delay in the start of anthesis was greatest for `Sensation' (55.5.d) and least for `Nam Dok Mai' (25.5.d) while at other temperatures there was little difference between cultivars. The distribution of hermaphrodite flowers within the inflorescence was independent of temperature with the highest percentage found in the apical half of the inflorescence. There ...","PeriodicalId":54808,"journal":{"name":"Journal of Horticultural Science & Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14620316.1999.11511073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60220078","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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