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Evidence Supporting a Role of Alternative Splicing Participates in Melon (Cucumis melo L.) Fruit Ripening

文献类型： 外文期刊

作者： Wang, Wenjiao 1 ; Wei, Yuping 1 ; Xu, Zhaoying 1 ; Shen, Chengcheng 1 ; Li, Ang 3 ; Guan, Dailu 4 ; Zhang, Xuejun 2 ; Liu, Bin 2 ;

作者机构： 1.Shanxi Agr Univ, Coll Hort, Jinzhong 030801, Peoples R China

2.Xinjiang Acad Agr Sci, Hami Melon Res Ctr, Urumqi 830091, Peoples R China

3.Xinjiang Univ, Coll Life Sci & Technol, Urumqi 830046, Peoples R China

4.Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USA

关键词： fruit ripening; alternative splicing; melon (Cucumis melo L.); serine/arginine-rich gene family

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.6 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 11 期

页码：

收录情况： SCI

摘要： One key post-transcriptional modification mechanism that dynamically controls a number of physiological processes in plants is alternative splicing (AS). However, the functional impacts of AS on fruit ripening remain unclear. In this research, we used RNA-seq data from climacteric (VED, Harukei 3) and non-climacteric (PI, PS) melon cultivars to explore alternative splicing (AS) in immature and mature fruit. The results revealed dramatic changes in differential AS genes (DAG) between the young and mature fruit stages, particularly in genes involved in fruit development/ripening, carotenoid and capsaicinoid biosynthesis, and starch and sucrose metabolism. Serine/arginine-rich (SR) family proteins are known as important splicing factors in AS events. From the melon genome, a total of 17 SR members were discovered in this study. These genes could be classified into eight distinct subfamilies based on gene structure and conserved motifs. Promoter analysis detected various cis-acting regulatory elements involved in hormone pathways and fruit development. Interestingly, these SR genes exhibited specific expression patterns in reproductive organs such as flowers and ovaries. Additionally, concurrent with the increase in AS levels in ripening fruit, the transcripts of these SR genes were activated during fruit maturation in both climacteric and non-climacteric melon varieties. We also found that most SR genes were under selection during domestication. These results represent a novel finding of increased AS levels and SR gene expression during fruit ripening, indicating that alternative splicing may play a role in fruit maturation.

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