数字农科院2.0

Widely targeted metabolomics and physiological analyses reveal the impact of ‘Zhongmikangzhen No. 2’ rootstock on Actinidia deliciosa

文献类型： 外文期刊

作者： Peng Zhang;Miaomiao Lin;Gloria De Mori;Congcong Li;Guido Cipriani;Sumei Li;Qina Zhang;Zhenzhen Zhang;Yihang Li;Leiming Sun;Jinbao Fang;Xiujuan Qi

作者机构：

关键词： A. valvata;Fruit quality;Kiwifruit;Metabolomics;Rootstock–scion interaction

期刊名称： Scientia Horticulturae

ISSN： 0304-4238

年卷期： 2025 年 353 卷

页码：

收录情况： SCIE（2025版）

摘要： Kiwifruit has extremely high nutritional value, but its rootstock strongly influences the physiology and metabolism of its scion fruit. Here, we evaluated the influence of a new kiwifruit rootstock, Actinidia valvata ′Zhongmikangzhen No. 2′, on the leaves and fruits of the scion A. deliciosa ′Zhongmi 2′. The leaf size, leaf mineral element contents, fruit size (single-fruit weight, longitudinal diameter and transverse diameter), and fruit quality traits (soluble sugar content, vitamin C content, total acidity and dry matter content) of ′Zhongmi 2′ grafted on ′Zhongmikangzhen No. 2′ (zk) and A. deliciosa seedling (zp) rootstock were measured at five fruit developmental stages (30, 60, 90, 120, and 150 days after flowering (DAF)). The zk fruits were significantly larger than those of zp and their leaves were also longer. The leaf length and width of the zk fruits was significantly greater than those of the zp fruits. The leaf contents of Cu, P and Mo significantly differed at 60, 120 and 120 DAF, respectively. The fruits of the two stock–scion combinations may presented different flavors. UPLC–MS/MS analysis of the fruit metabolome revealed 1697 differentially expressed metabolites. These metabolites, which were divided into multiple categories through KEGG analysis, indicated significant differences in fruit quality and resistance. Decanoic acid (decreased in zk-hard) and 9-oxononanoic acid (increased in zk-hard) may collectively affect fruit aroma. Moreover, α-linolenic acid and 12-oxo-phytodienoic acid (a precursor of jasmonic acid), both of which increase in zk-hard, contribute to increased nutritional value and are involved in the abiotic stress response, respectively. This study revealed the effects of different rootstock–scion combinations on fruit quality traits and leaf mineral elements and provides a basis for studying the mechanisms of rootstock–scion interactions.

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