Postharvest temperature and light treatments induce anthocyanin accumulation in peel of 'Akihime' plum (Prunus salicina Lindl.) via transcription factor PsMYB10.1
文献类型： 外文期刊
第一作者： Fang, Zhizhen
作者： Fang, Zhizhen;Jiang, Cuicui;Zhou, Danrong;Lin, Yanjuan;Pan, Shaolin;Ye, Xinfu;Fang, Zhizhen;Jiang, Cuicui;Zhou, Danrong;Lin, Yanjuan;Pan, Shaolin;Ye, Xinfu;Lin-Wang, Kui;Espley, Richard V.
作者机构：
关键词： Plum fruit coloration; Low temperature; Anthocyanin biosynthesis; Transcription factor; PsMYB10; 1
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 179 卷
页码：
收录情况： SCI
摘要： Anthocyanin accumulation is responsible for red pigmentation in plum peel and affected by light and temperature. We investigated the effects of temperature and LED light (400-800 nm, with following red: green: blue ratio 20.9: 75.7: 3.4 respectively) with total radiant flux adjusted at 150 mol m- 2 s- 1 on anthocyanin accumulation in postharvest 'Akihime' plum peel and found that 20 degrees C/light could induce anthocyanin concentration and therefore improve red coloration. However, no significant anthocyanin accumulation was detected in the peel of plums treated with 30 degrees C or under dark conditions. RNA-Seq and qRT-PCR analysis showed that the transcript levels of anthocyanin accumulation-related genes, including phenylalanine ammonialyase (PAL), cinnamate-4-hydroxylase (C4H), 4-coumaroyl:CoA-ligase (4CL), chalcone synthase (CHS), chalcone isomerase (CHI), flavanone 3-hydroxylase (F3H), dihydroflavonol 4-reductase (DFR), anthocyanidin synthase (ANS), UDP-glucose: flavonoid 3-O-glucosyltransferase (UFGT) and glutathione S-transferase (GST) in the peel were upregulated by 20 degrees C/light treatment. Transcription factors differentially regulated by temperature and light were identified. A homolog of peach anthocyanin MYB activator, namely PsMYB10.1, was lowly expressed in the peel of unpigmented fruit but significantly upregulated by 20 degrees C/light treatment. The function of PsMYB10.1 was verified by transient overexpression in Nicotiana tabacum leaves, resulting in strong anthocyanin accumulation when coinfiltrated with PsbHLH3. Dual luciferase assays further showed that PsMYB10.1 activated the promoters of the anthocyanin biosynthetic genes PsANS, PsUFGT and PsGST. These results suggest that appropriate temperature and light regimes at postharvest can induce anthocyanin accumulation in the peel of 'Akihime' plum by activating the expression of the positive regulator PsMYB10.1 and consequently the genes involved in biosynthesis and transportation of anthocyanin.
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