数字农科院2.0

Genome-wide analysis of nsltp gene family and identification of siltps contributing to high oil accumulation in sesame (Sesamum indicum l.)

文献类型： 外文期刊

作者： Song Shengnan;You Jun;Shi Lisong;Sheng Chen;Zhou Wangyi;Dossou Senouwa Segla Koffi;Dossa Komivi;Wang Linhai;Zhang Xiurong

作者机构：

关键词： Candidate genes; Lipid transfer proteins; Oil content; Overexpres-sion; Sesamum indicum; Transcriptomic analysis

期刊名称： International Journal of Molecular Sciences

ISSN： 1661-6596

年卷期： 2021 年 22 卷 10 期

页码：

收录情况： JCR（2021版）

摘要： The biosynthesis and storage of lipids in oil crop seeds involve many gene families, such as nonspecific lipid-transfer proteins (nsLTPs). nsLTPs are cysteine-rich small basic proteins essential for plant development and survival. However, in sesame, information related to nsLTPs was limited. Thus, the objectives of this study were to identify the Sesamum indicum nsLTPs (SiLTPs) and reveal their potential role in oil accumulation in sesame seeds. Genome-wide analysis revealed 52 SiLTPs, nonrandomly distributed on 10 chromosomes in the sesame variety Zhongzhi 13. Following recent classification methods, the SiLTPs were divided into nine types, among which types I and XI were the dominants. We found that the SiLTPs could interact with several transcription factors, including APETALA2 (AP2), DNA binding with one finger (Dof), etc. Transcriptome analysis showed a tissue-specific expression of some SiLTP genes. By integrating the SiLTPs expression profiles and the weighted gene co-expression network analysis (WGCNA) results of two contrasting oil content sesame varieties, we identified SiLTPI.23 and SiLTPI.28 as the candidate genes for high oil content in sesame seeds. The presumed functions of the candidate gene were validated through overexpression of SiLTPI.23 in Arabidopsis thaliana. These findings expand our knowledge on nsLTPs in sesame and provide resources for functional studies and genetic improvement of oil content in sesame seeds. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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