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Transcriptome Revealed the Effect of Shading on the Photosynthetic Pigment and Photosynthesis of Overwintering Tea Leaves

文献类型： 外文期刊

作者： Han, Xiao 1 ; Shen, Yaozong 1 ; Wang, Yu 1 ; Shen, Jiazhi 2 ; Wang, Hui 3 ; Ding, Shibo 3 ; Xu, Yang 1 ; Mao, Yilin 1 ; Chen, Hao 1 ; Song, Yujie 1 ; Ding, Zhaotang 1 ; Fan, Kai 1 ;

作者机构： 1.Qingdao Agr Univ, Tea Res Inst, Qingdao 266109, Peoples R China

2.Shandong Acad Agr Sci, Tea Res Inst, Jinan 250100, Peoples R China

3.Rizhao Acad Agr Sci, Tea Res Inst, Rizhao 276800, Peoples R China

关键词： Camellia sinensis (L; ) O; Kuntze; overwintering; shading; green preservation; transcriptome; chlorophyll metabolism

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 13 卷 7 期

页码：

收录情况： SCI

摘要： The physiological state of overwintering tea leaves is crucial for the growth and quality formation of spring tea shoots. Low temperatures in winter can easily cause damage to overwintering tea plants, leading to leaf chlorosis and abnormal physiological functions. Many pieces of research have shown that shading could promote chlorophyll (Chl) accumulation in tea leaves, but the impact on overwintering tea plants is not yet known. In this study, different shading rates (no-shading, S0%; 30% shading, S30%; 75% shading, S75%) were used to treat overwintering tea plants, which explored the effect of shading on the color and physiological functions of tea leaves. The results showed that Chl, carotenoid, and soluble sugar (SS) contents were S75% > S30% > S0%, and the net photosynthetic rate (Pn) was S75% > S30% > S0%. Transcriptome analysis showed that the genes involved in chlorophyll and carotenoid metabolism (such as protochlorophyllide reductase POR and zeaxanthin epoxidase ZEP) and photosynthesis (such as photosystem II P680 reaction center D2 protein PsbA and photosystem II CP47 chlorophyll apoprotein PsbB) were significantly up-regulated under shading. In addition, many differentially expressed genes (DEGs) were enriched in "starch and sucrose metabolism (ko00500)" and "anthocyanin biosynthesis (ko00942)" pathways. In summary, this study provided a theoretical basis and technical support for maintaining green leaves and normal physiological functions of overwintering tea plants.

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