Comparative transcriptomic analysis of the tea plant (Camellia sinensis) reveals key genes involved in pistil deletion
文献类型： 外文期刊
作者： Liu, Yufei 1 ; Pang, Dandan 1 ; Tian, Yiping 1 ; Li, Youyong 1 ; Jiang, Huibing 1 ; Sun, Yunnan 1 ; Xia, Lifei 1 ; Chen, 1 ;
作者机构： 1.Yunnan Acad Agr Sci, Tea Res Inst, Menghai 666201, Peoples R China
2.Yunnan Prov Key Lab Tea Sci, Menghai 666201, Peoples R China
关键词： Camellia sinensis; Special germplasm; Pistil deletion; ABCDE model; Ethylene
期刊名称：HEREDITAS （ 影响因子：3.271； 五年影响因子：2.807 ）
ISSN： 1601-5223
年卷期： 2020 年 157 卷 1 期
页码：
收录情况： SCI
摘要： Background The growth process of the tea plant (Camellia sinensis) includes vegetative growth and reproductive growth. The reproductive growth period is relatively long (approximately 1.5 years), during which a large number of nutrients are consumed, resulting in reduced tea yield and quality, accelerated aging, and shortened economic life of the tea plant. The formation of unisexual and sterile flowers can weaken the reproductive growth process of the tea plant. To further clarify the molecular mechanisms of pistil deletion in the tea plant, we investigated the transcriptome profiles in the pistil-deficient tea plant (CRQS), wild tea plant (WT), and cultivated tea plant (CT) by using RNA-Seq. Results A total of 3683 differentially expressed genes were observed between CRQS and WT flower buds, with 2064 upregulated and 1619 downregulated in the CRQS flower buds. These genes were mainly involved in the regulation of molecular function and biological processes. Ethylene synthesis-related ACC synthase genes were significantly upregulated and ACC oxidase genes were significantly downregulated. Further analysis revealed that one of the WIP transcription factors involved in ethylene synthesis was significantly upregulated. Moreover, AP1 and STK, genes related to flower development, were significantly upregulated and downregulated, respectively. Conclusions The transcriptome analysis indicated that the formation of flower buds with pistil deletion is a complex biological process. Our study identified ethylene synthesis, transcription factor WIP, and A and D-class genes, which warrant further investigation to understand the cause of pistil deletion in flower bud formation.
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