Latex-specific transcriptome analysis reveals mechanisms for latex metabolism and natural rubber biosynthesis in laticifers of Hevea brasiliensis

文献类型： 外文期刊

第一作者： Long, Xiangyu

作者： Long, Xiangyu;Fang, Yongjun;Qin, Yunxia;Yang, Jianghua;Xiao, Xiaohu

作者机构：

关键词： Laticifer-specific genes; JA signaling; Natural rubber biosynthesis; Rubber tree; Ubiquitin-proteasome system

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）

ISSN： 0926-6690

年卷期： 2021 年 171 卷

页码：

收录情况： SCI

摘要： Natural rubber, produced in the laticifers of the para rubber tree (Hevea brasiliensis), is a valuable biopolymer of commercial and strategic importance. While the basic pathway of rubber biosynthesis has been established, further understanding of its regulatory mechanisms might be obtained by studying laticifer-specific gene expression. Here, gene expression patterns was investigated in five different tissues of the rubber tree to explore differentially expressed genes (DEGs). The expression of 4122 high expression genes and 6485 low expression genes in the laticifer was enriched in various metabolic pathways related to rubber biosynthesis. The study results suggest that isopentenyl pyrophosphate (IPP), a principal precursor of natural rubber, is supplied mainly via the mevalonate (MVA) pathway in rubber biosynthesis, rather than the 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway. The ubiquitin-proteasome system (UBS) that is surprisingly active in the laticifer might serve as an important metabolic control mechanism in rubber biosynthesis. The involvement of latex specific transcription factors (TFs) was identified in seven plant hormone signal transductions, suggesting that jasmonate (JA) signaling is active in the positive regulation of rubber biosynthesis.

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