RNA Sequencing Reveals Phenylpropanoid Biosynthesis Genes and Transcription Factors for Hevea brasiliensis Reaction Wood Formation
文献类型： 外文期刊
作者： Meng, Xiangxu 1 ; Wang, Yue 1 ; Li, Jia 1 ; Jiao, Nanbo 1 ; Zhang, Xiujie 1 ; Zhang, Yuanyuan 3 ; Chen, Jinhui 1 ; Tu, Zh 1 ;
作者机构： 1.Hainan Univ, Sch Forestry, Key Lab Genet & Germplasm Innovat Trop Special Fo, Minist Educ,Engn Res Ctr Rare & Precious Tree Spe, Haikou, Hainan, Peoples R China
2.Hainan Univ, Sch Forestry, Hainan Key Lab Biol Trop Ornamental Plant Germpla, Inst Trop Agr & Forestry, Haikou, Hainan, Peoples R China
3.Chinese Acad Trop Agr Sci, Rubber Res Inst, Haikou, Hainan, Peoples R China
4.State Ctr Rubber Breeding, Haikou, Hainan, Peoples R China
关键词： rubber tree; rubber wood; reaction wood; phenylpropanoid biosynthesis pathway; lignin biosynthesis
期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.599； 五年影响因子：4.888 ）
ISSN：
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： Given the importance of wood in many industrial applications, much research has focused on wood formation, especially lignin biosynthesis. However, the mechanisms governing the regulation of lignin biosynthesis in the rubber tree (Hevea brasiliensis) remain to be elucidated. Here, we gained insight into the mechanisms of rubber tree lignin biosynthesis using reaction wood (wood with abnormal tissue structure induced by gravity or artificial mechanical treatment) as an experimental model. We performed transcriptome analysis of rubber tree mature xylem from tension wood (TW), opposite wood (OW), and normal wood (NW) using RNA sequencing (RNA-seq). A total of 214, 1,280, and 32 differentially expressed genes (DEGs) were identified in TW vs. NW, OW vs. NW, and TW vs. OW, respectively. GO and KEGG enrichment analysis of DEGs from different comparison groups showed that zeatin biosynthesis, plant hormone signal transduction, phenylpropanoid biosynthesis, and plant-pathogen interaction pathways may play important roles in reaction wood formation. Sixteen transcripts involved in phenylpropanoid biosynthesis and 129 transcripts encoding transcription factors (TFs) were used to construct a TF-gene regulatory network for rubber tree lignin biosynthesis. Among them, MYB, C2H2, and NAC TFs could regulate all the DEGs involved in phenylpropanoid biosynthesis. Overall, this study identified candidate genes and TFs likely involved in phenylpropanoid biosynthesis and provides novel insights into the mechanisms regulating rubber tree lignin biosynthesis.
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