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Pperf3 Positively Regulates Aba Biosynthesis B.y Activating Ppnced2/3 Transcription D uring Fruit Ripening In Peach

文献类型： 外文期刊

作者： Wang, XB; Zeng, WF; Ding, YF; Wang, Y; Niu, L; Yao, JL; Pan, L; Lu, ZH; Cui, GC; Li, GH; Wang, ZQ

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期刊名称： HORTICULTURE RESEARCH

ISSN： 2052-7276

年卷期： 2019 年 6 卷

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收录情况： SCI

摘要： The plant hormone ethylene regulates ripening in climacteric fruits. The phytohormone abscisic acid (ABA) affects ethylene biosynthesis, but whether ethylene influences ABA biosynthesis is unknown. To explore this possibility, we investigated the interactions between the ABA biosynthesis genes PpNCED2/3 and the ethylene response transcription factor PpERF3 in peach fruit. The ABA content increased during fruit maturation and reached a peak at stage S4 III. The increase was greatly inhibited by the ethylene inhibitor 1-MCP, which also suppressed PpERF3 expression. PpERF3 shared a similar expression profile with PpNCED2/3, encoding a rate-limiting enzyme involved in ABA biosynthesis, during fruit ripening. A yeast one-hybrid assay suggested that the nuclear-localized PpERF3 might bind to the promoters of PpNCED2/3. PpERF3 increased the expression of PpNCED2/3 as shown by dual-luciferase reporters, promoter-GUS assays and transient expression analyses in peach fruit. Collectively, these results suggest that ethylene promotes ABA biosynthesis through PpERF3's regulation of the expression of ABA biosynthesis genes PpNCED2/3.

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