Effects of Mepiquat Chloride and Chlormequat Chloride on the Growth and Fruit Quality of 'Shine Muscat' Grapevines

文献类型： 外文期刊

第一作者： Cheng, Dawei

作者： Cheng, Dawei;He, Shasha;Li, Lan;Tong, Xiangyang;Gu, Hong;Sun, Xiaoxu;Li, Ming;Chen, Jinyong;Cheng, Dawei;He, Shasha;Li, Lan;Tong, Xiangyang;Gu, Hong;Sun, Xiaoxu;Li, Ming;Chen, Jinyong

作者机构：

关键词： grape; vigorous growth; plant growth regulators (PGRs); new shoot growth; berry quality

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 12 期

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收录情况： SCI

摘要： Excessive shoot vigor in grapevines negatively impacts plant growth and fruit quality, necessitating the use of plant growth regulators (PGRs) for canopy management. This study investigated the effects of mepiquat chloride (MC) and chlormequat chloride (CCC) on shoot growth (including new shoot length, relative chlorophyll content, leaf area, etc.) and fruit quality in Vitis vinifera cv. 'Shine Muscat'. Different concentrations of MC (100, 300, 500, 700 mg/L) and CCC (100, 300, 500, 700 mg/L) were applied via foliar spraying at multiple stages before flowering. The results demonstrated that both PGRs effectively suppressed shoot elongation, with CCC exhibiting superior inhibitory efficacy compared to MC. However, high concentration of either compound also restricted leaf and cluster development. Optimal treatments MC (500 mg/L) and CCC (100 mg/L) significantly enhanced berry size, soluble solids content (SSC), and solid-acid ratio while maintaining effective shoot control. For practical application, we recommend spraying MC (500 mg/L) or CCC (100 mg/L) during the new shoot growth, flower-cluster separation, and flowering stages of 'Shine Muscat' grapevines to improve the new shoot control effect and fruit quality.

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