Effects of Plant Growth Regulators on Magnesium Absorption and Fruit Quality in "Vitis vinifera cv. Shine-Muscat" Grape

文献类型： 外文期刊

第一作者： Wang, Qiangfeng

作者： Wang, Qiangfeng;Yang, Yunyue;Wang, Haitao;Hou, Yong;Xia, Zhongmei

作者机构：

关键词： RNA sequencing; Organic acid targeted metabolomics; GC-MS

期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.4； 五年影响因子：4.9 ）

ISSN： 0721-7595

年卷期： 2025 年 44 卷 7 期

页码：

收录情况： SCI

摘要： To investigate whether plant growth regulators (PGRs) promote the absorptions of magnesium in grapes, we used 6-Benzylaminopurine (6-BA) and 28-Homobrassinolide (HBL) and studied their regulatory mechanism on magnesium (Mg) absorption in grapes and explored their impact on grapes quality. The results showed that under Mg deficiency stress, both 6-BA and HBL could promote the transfer of Mg to the aboveground part of grapes. The combination of 6-BA or HBL and Mg fertilizer increased the absorption rate of Mg in grape leaves. Transcription analysis revealed that grape leaves under Mg deficiency stress mainly adapt to the stress environment by changing cellular components, conducting multiple reactions, acid transport, enzyme catalytic activity, and binding. Further analysis revealed that genes related to chlorophyll synthesis and degradation pathways, as well as genes related to plant hormone signaling pathways are enriched. Both cytokinin oxidase/dehydrogenase (CKX) and hormone metabolism related genes are involved in the regulation of Mg absorption process. The field experiment confirmed that both 6-BA and HBL have a promoting effect on Mg absorption. Fruit quality testing found that 6-BA and HBL can increase grape single fruit weight, total soluble solids (TSS), total sugar, and vitamin C content. Compared with the control, the combination of PGRs (6-BA and HBL) and Mg fertilizer reduced grape fruit hardness and organic acid content, while increasing single fruit weight, TSS, total sugar, and vitamin C content. Using GC-MS to analyze the types and relative content of aroma compounds, it was found that the relative content of aroma compounds in grape fruits was highest after the combination of 6-BA and Mg fertilizer application. When HBL is treated alone, the relative content of terpenoids produced is the highest, and the relative content of aldehydes produced by the combination of HBL and Mg fertilizer is the highest. In this study, the production obstacles of Mg absorption in Vitis vinifera cv. Shine-Muscat grapes under facility cultivation were alleviated by the combination of PGRs and Mg fertilizer, which provided a solution for improving the utilization efficiency of Mg fertilizer, yield and fruit quality of Vitis vinifera cv. Shine-Muscat grapes.

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