文献类型： 外文期刊

作者： Lu, Mengqian ¹ ; Han, Jieyun ¹ ; Zhu, Biying ¹ ; Jia, Huiyan ¹ ; Yang, Tianyuan ¹ ; Wang, Rangjian ² ; Deng, Wei-Wei ¹ ;

作者机构： 1.Anhui Agr Univ, State Key Lab Tea Plant Biol & Utilizat, 130 Changjiang West Rd, Hefei 230036, Anhui, Peoples R China

2.Fujian Acad Agr Sci, Tea Res Inst, Fuan 355015, Fujian, Peoples R China

关键词： Albino tea plant; Chlorophyll biosynthesis; Differentially expressed genes; Polyphenol; Theanine

期刊名称：PLANTA （ 影响因子：4.116； 五年影响因子：4.316 ）

ISSN： 0032-0935

年卷期： 2019 年 249 卷 2 期

页码：

收录情况： SCI

摘要： Main conclusionA normal tea plant with one albino branch was discovered. RNA sequencing, albinism phenotype and ultrastructural observations provided a valuable understanding of the albino mechanism in tea plants.Tea plants with a specific color (white or yellow) have been studied extensively. A normal tea plant (Camellia sinensis cv. quntizhong) with one albino branch was discovered in a local tea plantation in Huangshan, Anhui, China. The pure albino leaves on this special branch had accumulated a fairly high content of amino acids, especially theanine (45.31mg/g DW), and had a low concentration of polyphenols and an extremely low chlorophyll (Chl) content compared with control leaves. Ultrastructural observation of an albino leaf revealed no chloroplasts, whereas it was viable in the control leaf. RNA sequencing and differentially expressed gene (DEG) analysis were performed on the albino leaves and on control leaves from a normal green branch. The related genes involved in theanine and polyphenol biosynthesis were also investigated in this study. DEG expression patterns in Chl biosynthesis or degradation, carotenoid biosynthesis or degradation, chloroplast development, and biosynthesis were influenced in the albino leaves. Chloroplast deletion in albino leaves had probably destroyed the balance of carbon and nitrogen metabolism, leading to a high accumulation of free amino acids and a low concentration of polyphenols in the albino leaves. The obtained results can provide insight into the mechanism underlying this special albino branch phenotype, and are a valuable contribution toward understanding the albino mechanism in tea plants.