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Article

Induced Mutation in GmCOP1b Enhances the Performance of Soybean under Dense Planting Conditions

by
Ronghuan Ji
1,2,†,
Xinying Xu
1,†,
Jun Liu
1,
Tao Zhao
1,
Hongyu Li
1,
Jixian Zhai
2 and
Bin Liu
1,*
1
The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
2
Department of Biology, Southern University of Science and Technology, Shenzhen 518055, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Int. J. Mol. Sci. 2022, 23(10), 5394; https://doi.org/10.3390/ijms23105394
Submission received: 11 April 2022 / Revised: 3 May 2022 / Accepted: 10 May 2022 / Published: 12 May 2022
(This article belongs to the Special Issue Light as a Growth and Development Regulator to Control Plant Biology)
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Abstract

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.
Keywords: soybean; photomorphogenesis; shade avoidance; stem elongation soybean; photomorphogenesis; shade avoidance; stem elongation

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MDPI and ACS Style

Ji, R.; Xu, X.; Liu, J.; Zhao, T.; Li, H.; Zhai, J.; Liu, B. Induced Mutation in GmCOP1b Enhances the Performance of Soybean under Dense Planting Conditions. Int. J. Mol. Sci. 2022, 23, 5394. https://doi.org/10.3390/ijms23105394

AMA Style

Ji R, Xu X, Liu J, Zhao T, Li H, Zhai J, Liu B. Induced Mutation in GmCOP1b Enhances the Performance of Soybean under Dense Planting Conditions. International Journal of Molecular Sciences. 2022; 23(10):5394. https://doi.org/10.3390/ijms23105394

Chicago/Turabian Style

Ji, Ronghuan, Xinying Xu, Jun Liu, Tao Zhao, Hongyu Li, Jixian Zhai, and Bin Liu. 2022. "Induced Mutation in GmCOP1b Enhances the Performance of Soybean under Dense Planting Conditions" International Journal of Molecular Sciences 23, no. 10: 5394. https://doi.org/10.3390/ijms23105394

APA Style

Ji, R., Xu, X., Liu, J., Zhao, T., Li, H., Zhai, J., & Liu, B. (2022). Induced Mutation in GmCOP1b Enhances the Performance of Soybean under Dense Planting Conditions. International Journal of Molecular Sciences, 23(10), 5394. https://doi.org/10.3390/ijms23105394

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