Genome analysis of Taraxacum kok-saghyz Rodin provides new insights into rubber biosynthesis

文献类型： 外文期刊

第一作者： Lin, Tao

作者： Lin, Tao;Xu, Xia;Cheng, Zhukuan;Yu, Hong;Li, Jiayang;Lin, Tao;Xu, Xia;Cheng, Zhukuan;Yu, Hong;Li, Jiayang;Ruan, Jue;Wu, Shigang;Shao, Xiujuan;Wang, Xiaobo;Xiong, Guosheng;Huang, Sanwen;Liu, Shizhong;Gan, Lin;Qin, Bi;Yang, Yushuang;Yang, Suhua;Zhang, Zhonghua;Li, Jiayang

作者机构：

关键词： Taraxacum kok-saghyz; genomics; rubber biosynthesis; CPT/CPTL; REF/SRPP

期刊名称：NATIONAL SCIENCE REVIEW （ 影响因子：17.275； 五年影响因子：17.584 ）

ISSN： 2095-5138

年卷期： 2018 年 5 卷 1 期

页码：

收录情况： SCI

摘要： The Russian dandelion Taraxacum kok-saghyz Rodin (TKS), a member of the Composite family and a potential alternative source of natural rubber (NR) and inulin, is an ideal model system for studying rubber biosynthesis. Here we present the draft genome of TKS, the first assembled NR-producing weed plant. The draft TKS genome assembly has a length of 1.29 Gb, containing 46 731 predicted protein-coding genes and 68.56% repeats, in which the LTR-RT elements predominantly contribute to the genome enlargement. We analyzed the heterozygous regions/genes, suggesting its possible involvement in inbreeding depression. Through comparative studies between rubber-producing and non-rubber-producing plants, we found that enzymes of the mevalonate (MVA) pathway and rubber elongation might be critical for rubber biosynthesis, and several key isoforms have been isolated and shown to be predominantly expressed in the latex, indicating their crucial functions in rubber biosynthesis. Moreover, for two important families in rubber elongation, the CPT/CPTL and REF/SRPP families, diverse evolutionary tracks have been revealed. These results provide valuable resources and new insights into the mechanism of NR biosynthesis, and facilitate the development of alternative NR-producing crops.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序