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Comparison of transcriptional expression patterns of phenols and carotenoids in 'Kyoho' grapes under a two-crop-a-year cultivation system

文献类型： 外文期刊

作者： Cheng, Guo 1 ; Zhou, Sihong 1 ; Zhang, Jin 1 ; Huang, Xiaoyun 1 ; Bai, Xianjin 1 ; Xie, Taili 1 ; Guo, Rongrong 1 ; Liu, 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Grape & Wine Res Inst, Nanning, Guangxi, Peoples R China

2.Guangxi Crop Genet Improvement & Biotechnol Lab, Nanning, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2019 年 14 卷 1 期

页码：

收录情况： SCI

摘要： To fully utilize the characteristic climatic conditions in the southern region of China, a two-crop-a-year cultivation system technique for 'Kyoho' grape was developed during the past decade. After summer harvest in June, appropriate pruning and chemical treatments promote flowering and fruiting, which enables a second harvest in late December. Due to climatic differences between the two crop growing seasons, grape phenol and carotenoid metabolism differ greatly. The reported study analyzed the transcriptome of the carotenoid and phenylpropanoid/flavonoid pathways in grapes at four different stages during the two growing seasons. Compared with those in summer grapes, expression levels of the majority of genes involved in the carotenoid metabolic pathway in winter grapes were generally upregulated. This result was associated with lower rainfall and much more abundant sunlight during the second growing season. On the other hand, summer cropping strongly triggered the expression of upstream genes in the phenylpropanoid/flavonoid pathway at E-L33 and E-L35. Transcript levels of flavonoid 3',5'-hydroxylase (F3'5'H), flavonoid 3'-hydroxylase (F3'H), flavonoid 3-hydroxylase (F3H) and glutathione S-transferase (GST) were upregulated in winter grapes at the mature stage. Together, these results might indicate that more flavonoids would be synthesized in ripe winter grapes during the mature stage of the second crop under much drier conditions, longer sunlight hours and lower temperature. These data provide a theoretical foundation for the secondary metabolism of berries grown under two-crop-a-year cultivation systems.

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