Induced Mutation in GmCOP1b Enhances the Performance of Soybean under Dense Planting Conditions
文献类型: 外文期刊
第一作者: Ji, Ronghuan
作者: Ji, Ronghuan;Xu, Xinying;Liu, Jun;Zhao, Tao;Li, Hongyu;Liu, Bin;Ji, Ronghuan;Zhai, Jixian
作者机构:
关键词: soybean; photomorphogenesis; shade avoidance; stem elongation
期刊名称:INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES ( 影响因子:6.208; 五年影响因子:6.628 )
ISSN:
年卷期: 2022 年 23 卷 10 期
页码:
收录情况: SCI
摘要: CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) is the key photomorphogenic inhibitor that has been extensively studied in higher plants. Nevertheless, its role has not been documented in the economically important soybean. Here we investigated the functions of two COP1 homologous genes, GmCOP1a and GmCOP1b, by analyzing Gmcop1a and Gmcop1b mutants with indels using CRISPR in soybean. We revealed that, although both genes are required for skotomorphogenesis in the dark, the GmCOP1b gene seems to play a more prominent role than GmCOP1a in promoting stem elongation under normal light conditions. Consistently, the bZIP transcriptional factors STF1/2, which repress stem elongation in soybean, accumulated to the highest level in the Gmcop1a1b double mutant, followed by the Gmcop1b and Gmcop1a mutants. Furthermore, the Gmcop1b mutants showed reduced shade response and enhanced performance under high-density conditions in field trials. Taken together, this study provides essential genetic resources for elucidating functional mechanisms of GmCOP1 and breeding of high yield soybean cultivars for future sustainable agriculture.
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