Responses of secondary metabolites and transcriptomes in the tea cultivar 'Zhong Ming 6' (Camellia sinensis) to blue light and red light

文献类型： 外文期刊

第一作者： Shirin, Aktar

作者： Shirin, Aktar;Zhang, Yazhen;Mao, Peng;Lei, Yuping;Bai, Peixian;Wang, Yongxin;Ruan, Li;Xun, Hanshuo;Wu, Liyun;Cheng, Hao;Wang, Liyuan;Wei, Kang;Shirin, Aktar;Wei, Kang

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关键词： Light quality; Tea plant; Catechin; Anthocyanin; TGGP (1,2,6-tri-O-galloyl-beta-D-glucopyranose); MYBs

期刊名称：PLANT GROWTH REGULATION （ 影响因子：3.242； 五年影响因子：3.607 ）

ISSN： 0167-6903

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收录情况： SCI

摘要： Light is one of the most important environmental factors that stimulates plant metabolism. Zhong Ming 6 (ZM6) is a green tea (Camellia sinensis) cultivar that highly accumulates TGGP (1,2,6-tri-O-galloyl-beta-D-glucopyranose). Here, three kinds of supplemental light wavelengths, including blue light (BL, 200 mu mol m(-2) s(-1)), red light (RL, 200 mu mol m(-2) S-1), and white light (WL/CK, 200 mu mol m(-2) S-1), were applied to explore their effects on the transcriptomes and metabolomes of young shoots (one bud and two leaves) in tea plants. Interestingly, artificial BL and RL significantly affected the secondary metabolites and transcriptome factors of tea plants. Here, BL had strong effects on multiple physiological actions related to secondary metabolism. In addition, RL could induce plant growth, development, and photosynthesis. Eight structural genes and 34 transcription factors (TFs) that were significantly correlated with total catechin (TC) and anthocyanin contents were identified. Due to the upregulation of the CsGSTF12 gene in the flavonoid biosynthesis pathway, anthocyanin production under BL was much higher than those under RL and WL. However, CsMYB75, Cs3GGT, bHLH-MYC, and other R2R3-MYBs were also highly upregulated under BL, which increased the accumulation of TC and anthocyanins in tea plants. The CsMYB4 gene was highly significant and positively correlated with TC and anthocyanin accumulation under RL. We showed that BL is less conducive to plant growth due to the number of functional metabolites (gallic acid, caffeine, TC, TGGP, and anthocyanin) that were increased. RL can also be used to increase the chlorophyll content and tea yield, as well as for improving taste, quality, and metabolic mechanisms of the tea plant.

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