Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria”
“Alexander” grape (Vitis vinifera cv. Muscat of Alexandria) belongs to Euro-Asian species and performs excellent in the southern China such as Zhejiang Province. However, as its high fruit setting and compact fruit spikes, fruit thinning in time was very necessary. Currently, elongating clusters of...
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Zhejiang University Press
2016-05-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2015.10.261 |
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| author | ZHANG Liping LU Xiaoming LU Meidan WANG Li LI Kunfeng SHEN Linzhang JIA Huijuan |
| author_facet | ZHANG Liping LU Xiaoming LU Meidan WANG Li LI Kunfeng SHEN Linzhang JIA Huijuan |
| author_sort | ZHANG Liping |
| collection | DOAJ |
| description | “Alexander” grape (Vitis vinifera cv. Muscat of Alexandria) belongs to Euro-Asian species and performs excellent in the southern China such as Zhejiang Province. However, as its high fruit setting and compact fruit spikes, fruit thinning in time was very necessary. Currently, elongating clusters of grape using gibberellin (GA<sub>3</sub>) is widely applied in Euro-American species; however, the effects of clusters elongation on fruit quality and simplified degree of fruit thinning have not been reported. In addition, the concentration of GA<sub>3</sub> used for clusters elongating have great differences according to sensitive degree of cultivars.We explored the effects of GA<sub>3</sub> treatment on simplification of fruit thinning and fruit quality in this study, in order to provide the theoretical basis and technical support for industrial development of “Alexander” grape.Six-year-old “Mascat of Alexandria” trees were used in this study. Clusters were sprayed with different concentrations (1,2,3,4, and 5 mg/L) of GA<sub>3</sub> when their length reached 2.71-8.68 cm about 15 days before full-bloom stage of “Alexander” grape to explore the effects of GA<sub>3</sub> treatment on simplification of fruit thinning and fruit quality. Fruits were picked when the total soluble solid (TSS) content reached 17% and were sampled when they reached commercial maturity. The length of the clusters and quality indexes were determined at harvest.The results showed that the treatment effect of 3 mg/L GA<sub>3</sub> solution was the best when the new shoot length reached 15-20 cm, the leaf number was 6-7 pieces and the average length of the clusters was 3.53 cm. Compared with the control (0 mg/L GA<sub>3</sub> treatment),3 mg/L GA<sub>3</sub> treatment can elongate clusters by 50%, obtain loose fruit spikes but not too loosen as well as better fruit setting. The average fruit spike mass reached the maximum value after 3 mg/L treatment, and can reduce workload of fruit thinning by 38%. Compared with the control, treatment with different concentrations of GA<sub>3</sub> solution all enhanced the content of TSS, glucose, fructose, tartaric acid, malic acid, and linalool. Moreover,3 mg/L GA<sub>3</sub> treatment greatly increased the contents of total phenols and nerol.In conclusion, the treatment of 3 mg/L GA<sub>3</sub> can obtain better fruit quality and effectively lower the work load of fruit thinning. It is suggested to spray “Alexander” grape clusters with 3 mg/L GA<sub>3</sub> solution about 15 days before full-bloom stage in the production, which could reduce labor cost and improve labor efficiency. |
| format | Article |
| id | doaj-art-7d24fd91a23d46498521c9b33ee4e674 |
| institution | DOAJ |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Zhejiang University Press |
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| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-7d24fd91a23d46498521c9b33ee4e6742025-08-20T03:16:10ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552016-05-014232733210.3785/j.issn.1008-9209.2015.10.26110089209Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria”ZHANG LipingLU XiaomingLU MeidanWANG LiLI KunfengSHEN LinzhangJIA Huijuan“Alexander” grape (Vitis vinifera cv. Muscat of Alexandria) belongs to Euro-Asian species and performs excellent in the southern China such as Zhejiang Province. However, as its high fruit setting and compact fruit spikes, fruit thinning in time was very necessary. Currently, elongating clusters of grape using gibberellin (GA<sub>3</sub>) is widely applied in Euro-American species; however, the effects of clusters elongation on fruit quality and simplified degree of fruit thinning have not been reported. In addition, the concentration of GA<sub>3</sub> used for clusters elongating have great differences according to sensitive degree of cultivars.We explored the effects of GA<sub>3</sub> treatment on simplification of fruit thinning and fruit quality in this study, in order to provide the theoretical basis and technical support for industrial development of “Alexander” grape.Six-year-old “Mascat of Alexandria” trees were used in this study. Clusters were sprayed with different concentrations (1,2,3,4, and 5 mg/L) of GA<sub>3</sub> when their length reached 2.71-8.68 cm about 15 days before full-bloom stage of “Alexander” grape to explore the effects of GA<sub>3</sub> treatment on simplification of fruit thinning and fruit quality. Fruits were picked when the total soluble solid (TSS) content reached 17% and were sampled when they reached commercial maturity. The length of the clusters and quality indexes were determined at harvest.The results showed that the treatment effect of 3 mg/L GA<sub>3</sub> solution was the best when the new shoot length reached 15-20 cm, the leaf number was 6-7 pieces and the average length of the clusters was 3.53 cm. Compared with the control (0 mg/L GA<sub>3</sub> treatment),3 mg/L GA<sub>3</sub> treatment can elongate clusters by 50%, obtain loose fruit spikes but not too loosen as well as better fruit setting. The average fruit spike mass reached the maximum value after 3 mg/L treatment, and can reduce workload of fruit thinning by 38%. Compared with the control, treatment with different concentrations of GA<sub>3</sub> solution all enhanced the content of TSS, glucose, fructose, tartaric acid, malic acid, and linalool. Moreover,3 mg/L GA<sub>3</sub> treatment greatly increased the contents of total phenols and nerol.In conclusion, the treatment of 3 mg/L GA<sub>3</sub> can obtain better fruit quality and effectively lower the work load of fruit thinning. It is suggested to spray “Alexander” grape clusters with 3 mg/L GA<sub>3</sub> solution about 15 days before full-bloom stage in the production, which could reduce labor cost and improve labor efficiency.https://www.academax.com/doi/10.3785/j.issn.1008-9209.2015.10.261grapegibberellins (GA<sub>3</sub>)“Mascat of Alexandria”clusterfruit quality |
| spellingShingle | ZHANG Liping LU Xiaoming LU Meidan WANG Li LI Kunfeng SHEN Linzhang JIA Huijuan Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria” 浙江大学学报. 农业与生命科学版 grape gibberellins (GA<sub>3</sub>) “Mascat of Alexandria” cluster fruit quality |
| title | Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria” |
| title_full | Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria” |
| title_fullStr | Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria” |
| title_full_unstemmed | Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria” |
| title_short | Key techniques of simplification of fruit thinning in the grape cultivar “Muscat of Alexandria” |
| title_sort | key techniques of simplification of fruit thinning in the grape cultivar muscat of alexandria |
| topic | grape gibberellins (GA<sub>3</sub>) “Mascat of Alexandria” cluster fruit quality |
| url | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2015.10.261 |
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