Comparative Transcriptome Analysis Provides Insights into the Effect of Epicuticular Wax Accumulation on Salt Stress in Coconuts
文献类型： 外文期刊
作者： Sun, Xiwei 1 ; Kaleri, Ghulam Abid 2 ; Mu, Zhihua 2 ; Feng, Yalan 1 ; Yang, Zhuang 2 ; Zhong, Yazhu 1 ; Dou, Yajing 1 ; Xu, Hang 2 ; Zhou, Junjie 2 ; Luo, Jie 2 ; Xiao, Yong 2 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Coconut Res Inst, Wenchang 571300, Peoples R China
2.Hainan Univ, Coll Breeding & Multiplicat, Sanya 572025, Peoples R China
关键词： coconut; transcriptome; salt tolerance
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 1 期
页码：
收录情况： SCI
摘要： The coconut is an important tropical economical crop and exhibits high tolerance to various types of salinity stress. However, little is known about the molecular mechanism underlying its salt tolerance. In this study, RNA-Seq was applied to examine the different genes expressed in four coconut varieties when exposed to a salt environment, resulting in the generation of data for 48 transcriptomes. Comparative transcriptome analysis showed that some genes involved in cutin and wax biosynthesis were significantly upregulated in salt treatment compared to the control, including CYP86A4, HTH, CER1, CER2, CER3, DCR, GPAT4, LTP3, LTP4, and LTP5. In particular, the expression of CER2 was induced more than sixfold, with an RPKM value of up to 205 ten days after salt treatment in Hainan Tall coconut, demonstrating superior capacity in salt tolerance compared to dwarf coconut varieties. However, for yellow dwarf and red dwarf coconut varieties, the expression level of the CER2 gene was low at four different time points after exposure to salt treatment, suggesting that this gene may contribute to the divergence in salt tolerance between tall and dwarf coconut varieties. Cytological evidence showed a higher abundance of cuticle accumulation in tall coconut and severe damage to cuticular wax in dwarf coconut.
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