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Identification and characterization of the MADS-box genes highly expressed in the laticifer cells of Hevea brasiliensis

文献类型： 外文期刊

作者： Wang, Ying 1 ; Zhan, Di-Feng 1 ; Li, Hui-Liang 1 ; Guo, Dong 1 ; Zhu, Jia-Hong 1 ; Peng, Shi-Qing 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Hainan, Peoples R China

2.CATAS, Hainan Acad Trop Agr Resource, Haikou 571101, Hainan, Peoples R China

3.Hainan Univ, Inst Trop Crops, Haikou 570228, Hainan, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2019 年 9 卷

页码：

收录情况： SCI

摘要： MADS-box transcription factors possess many functions in plant reproduction and development. However, few MADS-box genes related to secondary metabolites regulation have been identified. In Hevea brasiliensis, natural rubber is a representative cis-polyisoprenoids in secondary metabolism which occurs in the rubber laticifer cells, the molecular regulation basis of natural rubber biosynthesis is not clear. Here, a total of 24 MADS-box genes including 4 type I MADS-box genes and 20 type II MADS-box genes were identified in the transcriptome of rubber tree latex. The phylogenetic analysis was performed to clarify the evolutionary relationships of all the 24 rubber tree MADS-box proteins with MADS- box transcription factors from Arabidopsis thaliana and Oryza sativa. Four type I MADS-box genes were subdivided into M alpha (3 genes) and M beta (1 gene). Twenty type II MADS- box genes were subclassified into MIKC* (8 genes) and MIKCc(12 genes). Eight MADS-box genes (HblMADS3, 5, 6, 7, 9, 13, 23, 24) were predominant expression in laticifers. ABA up-regulated the expression of HblMADS9, and the expression of HblMADS3, HblMADS5, HblMADS24 were up-regulated by MeJA. The function of HblMADS24 was elucidated. HblMADS24 bound HbFPS1 promoter in yeast and HblMADS24 activated HbFPS1 promoter in tobacco plants. Moreover, we proposed that HblMADS24 is a transcription activator of HbFPS1 which taking part in natural rubber biosynthesis.

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