Effects of GA3 Treatments on Fruit Vascular Structure and Water Transport of Grape

文献类型： 外文期刊

第一作者： Cai, Zhong-Hui

作者： Cai, Zhong-Hui;Wang, Yue;Xie, Zhao-Sen;Li, Xiu-Jie;Li, Bo;Forney, Charles F.

作者机构：

关键词： Grape; GA(3); vascular bundle; water transport; sugar unloading

期刊名称：INTERNATIONAL JOURNAL OF FRUIT SCIENCE （ 影响因子：2.4； 五年影响因子：2.5 ）

ISSN： 1553-8362

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Exogenous gibberellic acid was applied to regulate fruit growth of grapes to acquire high quality seedless berries. The vascular bundles provide the pathway of water and nutrient transport into the fruit and play an important role in berry growth and sugar accumulation. Therefore, changes in berry size and quality are closely related to the structure and function of the vascular tissue. In this study, 10-year-old "Shine Muscat" grape vines were treated with GA(3) in grapevine production. Based on previous research and experimental environmental conditions, four treatments were applied: elongating cluster (5 mg L-1 GA(3) on Apr. 28)+ seedless(25 mg L-1 GA(3) on May. 24)+ expanding(50 mg L-1 GA(3) on Jun. 7) (T1), seedless(25 mg L-1 GA(3) on May. 24)+ expanding(50 mg L-1 GA3 on Jun. 7) (T2), expanding(50 mg L-1 GA(3) on Jun. 7) (T3) and water (CK). Compared to CK, all fruits treated with GA(3) had greater berry size. In addition, GA(3) treated grapes had greater vascular bundle areas, including the areas of both phloem and xylem, as well as a greater number of vessels compared to control fruit. During the first rapid growth stage, water transport into the grape was rapid and did not differ among treatments. During veraison, the water transport rate among the four treatments differed, and the rank of speed was T2>T3>CK>T1. Therefore, we found that GA3 treatment can significantly promote the differentiation of vascular tissues and improve water transport capacity and phloem sugar unloading; T2 promoted the development of vascular bundles, enhanced water transport speed and phloem sugar unloading of fruit after veraison, and increased berry size.

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