Expression Profiling of Mitogen-Activated Protein Kinase Genes Reveals Their Evolutionary and Functional Diversity in Different Rubber Tree (Hevea brasiliensis) Cultivars
文献类型: 外文期刊
第一作者: Jin, Xiang
作者: Jin, Xiang;Zhu, Liping;Yao, Qi;Meng, Xueru;Ding, Guohua;Wang, Dan;Tong, Zheng;Wang, Xuchu;Jin, Xiang;Zhu, Liping;Xie, Quanliang;Tao, Chengcheng;Yu, Li;Li, Hongbin;Wang, Xuchu
作者机构:
关键词: Hevea brasiliensis;mitogen-activated protein kinase;natural rubber biosynthesis;gene family evolution;functional diversity;abiotic stress
期刊名称:GENES ( 影响因子:4.096; 五年影响因子:4.339 )
ISSN: 2073-4425
年卷期: 2017 年 8 卷 10 期
页码:
收录情况: SCI
摘要: Rubber tree (Hevea brasiliensis) is the only commercially cultivated plant for producing natural rubber, one of the most essential industrial raw materials. Knowledge of the evolutionary and functional characteristics of kinases in H. brasiliensis is limited because of the long growth period and lack of well annotated genome information. Here, we reported mitogen-activated protein kinases in H. brasiliensis (HbMPKs) by manually checking and correcting the rubber tree genome. Of the 20 identified HbMPKs, four members were validated by proteomic data. Protein motif and phylogenetic analyses classified these members into four known groups comprising Thr-Glu-Tyr (TEY) and Thr-Asp-Tyr (TDY) domains, respectively. Evolutionary and syntenic analyses suggested four duplication events: HbMPK3/HbMPK6, HbMPK8/HbMPK9/HbMPK15, HbMPK10/HbMPK12 and HbMPK11/HbMPK16/HbMPK19. Expression profiling of the identified HbMPKs in roots, stems, leaves and latex obtained from three cultivars with different latex yield ability revealed tissueand variety-expression specificity of HbMPK paralogues. Gene expression patterns under osmotic, oxidative, salt and cold stresses, combined with cis-element distribution analyses, indicated different regulation patterns of HbMPK paralogues. Further, Ka/Ks and Tajima analyses suggested an accelerated evolutionary rate in paralogues HbMPK10/12. These results revealed HbMPKs have diverse functions in natural rubber biosynthesis, and highlighted the potential possibility of using MPKs to improve stress tolerance in future rubber tree breeding.
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