文献类型： 外文期刊

作者： Chen, Xiaomin ¹ ; Shao, Shuxian ¹ ; Yang, Ruxing ² ; Gu, Mengya ¹ ; Wang, Pengjie ¹ ; Zhao, Feng ⁴ ; Ye, Naixing ¹ ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Hort, Fuzhou 350002, Peoples R China

2.Fujian Acad Agr Sci, Tea Res Inst, Fuzhou 350012, Peoples R China

3.Chinese Acad Agr Sci, Minist Agr, Agr Genom Inst Shenzhen, Genome Anal Lab, Shenzhen 518120, Peoples R China

4.Fujian Univ Tradit Chinese Med, Coll Pharm, Fuzhou 350122, Peoples R China

关键词： tea flower; purine alkaloid pathway; theacrine; transcriptomic; WGCNA

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2021 年 22 卷 24 期

页码：

收录情况： SCI

摘要： Jiaocheng kucha is the first reported tea germplasm resource which contains theacrine founded in Fujian Province. Currently, the anabolic mechanism of theacrine within tea leaves is clear, but there are few studies focused on its flowers. In order to further explore the mechanism of theacrine synthesis and related genes in flowers, current study applied Jiaocheng kucha flowers (JC) as test materials and Fuding Dabaicha flowers (FD) as control materials to make transcriptome sequencing, and determination of purine alkaloid content in three different developmental periods (flower bud stage, whitening stage and full opening stage). The results showed that the flower in all stages of JC contained theacrine. The theacrine in the flower bud stage was significantly higher than in the other stages. The differentially expressed genes (DEGs) at three different developmental stages were screened from the transcriptome data, and were in a total of 5642, 8640 and 8465. These DEGs related to the synthesis of theacrine were primarily annotated to the pathways of purine alkaloids. Among them, the number of DEGs in xanthine synthesis pathway was the largest and upregulated in JC, while it was the smallest in caffeine synthesis pathway and downregulated in JC. Further weighted gene co-expression network (WGCNA) indicated that ADSL (CsTGY03G0002327), ADSL (CsTGY09G0001824) and UAZ (CsTGY06G0002694) may be a hub gene for the regulation of theacrine metabolism in JC. Our results will contribute to the identification of candidate genes related to the synthesis of theacrine in tea flowers, and explore the molecular mechanism of theacrine synthesis in JC at different developmental stages.