GhCaM7-like, a calcium sensor gene, influences cotton fiber elongation and biomass production

文献类型： 外文期刊

第一作者： Cheng, Yuan

作者： Cheng, Yuan;Lu, Lili;Yang, Zhaoen;Wu, Zhixia;Qin, Wenqiang;Yu, Daoqian;Ren, Zhongying;Li, Yi;Wang, Lingling;Li, Fuguang;Yang, Zuoren;Cheng, Yuan

作者机构：

关键词： Calmodulin;GhCaM7-like;Fiber elongation;Biomass production

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

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收录情况： SCI

摘要： Calcium signaling regulates many developmental processes in plants. Calmodulin (CaM) is one of the most conserved calcium sensors and has a flexible conformation in eukaryotes. The molecular functions of CaM are unknown in cotton, which is a major source of natural fiber. In this study, a Gossypium hirsutum LCaM7-like gene was isolated from upland cotton. Bioinformatics analysis indicated that the GhCaM7-like gene was highly conserved as compared with Arabidopsis AtCaM7. The GhCaM7-like gene showed a high expression level in elongating fibers. Expression of beta-glucuronidase was observed in trichomes on the stem, leaf and root in transgenic Arabidopsis plants of a PROGhcanv-tike:GUS fusion. Silencing of the GhCaM7-like gene resulted in decreased fiber length, but also caused reduction in stem height, leaf dimensions, seed length and 100-seed weight, in comparison with those of the control. Reduced expression of the GhCaM7-like gene caused decreased Ca2+ influx in cells of the leaf hypodermis and stem apex, and down -regulation of GhIQD1 (IQ67-domain containing protein), GhAnn2 (Annexins) and GhEXP2 (Expansin). These results indicate that the GhCaM7-like gene plays a vital role in calcium signaling pathways, and may regulate cotton fiber elongation and biomass production by affecting Ca2+ signatures and downstream signaling pathways of CaM. (C) 2016 Elsevier Masson SAS. All rights reserved.

分类号： Q945`Q946

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