Genome-wide identification and expression analysis of the GhIQD gene family in upland cotton (Gossypium hirsutum L.)

文献类型： 外文期刊

第一作者： Dou Lingling

作者： Dou Lingling;Kang Yangyang;Tian Ruijie;Huang Deqing;Li Jiayin;Li Siyi;Liu Fengping;Cao Lingyan;Jin Yuhua;Liu Yang;Li Huaizhu;Wang Wenbo;Lv Limin;Pang Chaoyou;Shang Haihong;Song Guoli;Shang Haihong;Song Guoli;Xiao Guanghui;Zou Changsong;Xiao Guanghui

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关键词： Gossypium hirsutum L.; GhIQD genes; Segmental duplication; Expression analysis

期刊名称：JOURNAL OF COTTON RESEARCH （ 影响因子：2.6； 五年影响因子：2.8 ）

ISSN： 2096-5044

年卷期： 2021 年 4 卷 1 期

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收录情况： SCI

摘要： Background: Calmodulin (CaM) is one of the most important Ca2+ signaling receptors because it regulates diverse physiological and biochemical reactions in plants. CaM functions by interacting with CaM-binding proteins (CaMBPs) to modulate Ca2+ signaling. IQ domain (IQD) proteins are plant-specific CaMBPs that bind to CaM by their specific CaM binding sites. Results: In this study, we identified 102 GhIQD genes in the Gossypium hirsutum L genome. The GhIQD gene family was classified into four clusters (I, II, Ill, and IV), and we then mapped the GhIQD genes to the G. hirsutum L. chromosomes. Moreover, we found that 100 of the 102 GhIQD genes resulted from segmental duplication events, indicating that segmental duplication is the main force driving GhIQD gene expansion. Gene expression pattern analysis showed that a total of 89 GhIQD genes expressed in the elongation stage and second cell wall biosynthesis stage of the fiber cells, suggesting that GhIQD genes may contribute to fiber cell development in cotton. In addition, we found that 20 selected GhIQD genes were highly expressed in various tissues. Exogenous application of MeJA significantly enhanced the expression levels of GhIQD genes. Conclusions: Our study shows that GhIQD genes are involved in fiber cell development in cotton and are also widely induced by MeJA. Thw results provide bases to systematically characterize the evolution and biological functions of GhIQD genes, as well as clues to breed better cotton varieties in the future.

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