The role of light intensity in mediating ascorbic acid content during postharvest tomato ripening: A transcriptomic analysis

文献类型： 外文期刊

第一作者： Zhang, Yating

作者： Zhang, Yating;Cheng, Ruifeng;Yang, Qichang;Li, Tao;Ntagkas, Nikolaos;Fanourakis, Dimitrios;Tsaniklidis, Georgios;Zhao, Jiantao

作者机构：

关键词： Ascorbic acid; D-Man; L-Gal pathway; Mature-green; Photosynthetic photon flux density; Photosynthetic photon transduction; Postharvest; Solanum lycopersicum

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：5.537； 五年影响因子：5.821 ）

ISSN： 0925-5214

年卷期： 2021 年 180 卷

页码：

收录情况： SCI

摘要： Ascorbic acid (ASA) is an essential antioxidant, participating in diverse processes. In this study, tomato fruit at two maturity stages (mature-green, breaker) were first exposed to light at four photosynthetic photon flux density (PPFD) levels [0 (darkness), 50, 300, 600 mu mol m-2 s-1], and then to darkness. As PPFD increased, ASA content was enhanced. The light-induced ASA content increase was dependent on the maturity stage, and persisted following darkening. High PPFD up-regulated the expression of key genes of the D-mannose/L-galactose pathway, showing the biosynthesis contributed, while the ASA recycling had a limited contribution. Weighted correlation network analysis showed that high PPFD potentially enhances the photosynthetic photon transduction, especially cyclic electron flow to excess photons. High PPFD up-regulated the expression of genes encoding non-enzymatic antioxidant biosynthesis. We show that photosynthetic photon transduction mediates fruit adaptation to light intensity, and provides new insights into the interactive regulation of fruit ASA accumulation.

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