Caffeate may play an important role in the somatic embryogenesis of oil palm (Elaeis guineensis Jacq.)
文献类型： 外文期刊
作者： Zhang, Dapeng 1 ; Shi, Peng 1 ; Htwe, Yin M. 1 ; Li, Zhiying 1 ; Ihase, Leonard O. 4 ; Mason, Annaliese S. 5 ; Sun, Xiwei 1 ; Xiao, Yong 1 ; Wang, Yong 2 ;
作者机构： 1.Chinese Acad Trop Agr Sci, SanYa Res Inst, Sanya 572000, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Coconut Res Inst, Wenchang 571339, Hainan, Peoples R China
3.Hainan Yazhou Bay Seed Lab, Sanya 572025, Hainan, Peoples R China
4.Nigerian Inst Oil Palm Res NIFOR, Benin, Nigeria
5.Univ Bonn, Bonn, Germany
关键词： Embryogenesis; Transcriptome; Metabolome; Caffeate; Lignin
期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.449； 五年影响因子：6.508 ）
ISSN： 0926-6690
年卷期： 2021 年 174 卷
页码：
收录情况： SCI
摘要： Somatic embryogenesis (SE) is a key step in plant regeneration and propagation, but the mechanisms underlying SE in oil palm still stay unclear. Integrated analysis of metabolome and transcriptome data showed that 13 metabolites are specifically accumulated in somatic embryo, of which caffeate was 16.6-fold (p = 0.0002) higher than in callus. Moreover, caffeate was significantly correlated with phytohormone signaling genes including ethylene receptor (ETR2-2), auxin efflux carrier component 3a (PIN3A), auxin response factor (ARF15-2), and several SE transcription factors (TFs) including WUSCHEL-related homeobox (WOX), VIVIPAROUS1(VP1), BABY BOOM2 (BBM2). Furthermore, staining and microscopic observation showed that phenolic acids highly accumulated in the center of newly formed callus clusters and lignin is predominant in somatic embryo than in callus, indicated that caffeate (the major phenolic acids in glycosylated form and the precursor of lignin biosynthesis) may play an important role in SE. Our results provide a better understanding of the SE mechanism in oil palm.
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