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Mutations in the WUSCHEL-related homeobox1 gene cause an increased leaflet number in soybean
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Mutations in the WUSCHEL-related homeobox1 gene cause an increased leaflet number in soybean
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Mutations in the WUSCHEL-related homeobox1 gene cause an increased leaflet number in soybean
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Journal Article
Mutations in the WUSCHEL-related homeobox1 gene cause an increased leaflet number in soybean
2024
Overview
WUSCHEL-related homeobox (WOX) transcription factors play a crucial role in lateral organ development in several plant species; however, their precise functions in soybean (Glycine max [L.] Merr.) were unclear. Here, we identified two independent multi-leaflet soybean mutants, mlw48-8 and mlw48-161, from a CRISPR/Cas9-engineered mutant library in the Williams 82 background. Both mutants exhibited irregular leaf margins, and the upper leaves were narrow and almost lanceolate at maturity. Molecular analysis revealed that these are allelic mutants with independent mutations in the WUSCHEL-related homeobox1 (GmWOX1A) gene. A transcriptome analysis demonstrated that GmWOX1A modulates the expression of auxin- and leaf development–related genes. Yeast two-hybrid and split-luciferase complementation imaging assays revealed that GmWOX1A interacts with the YABBY family protein GmYAB5, providing further evidence of its potential involvement in leaf development. Notably, the mlw48-161 mutant showed an increased seed number per plant. Consequently, our study not only provides valuable insights into the role of GmWOX1A in soybean leaf development but also offers a potential strategy for high-yield breeding.
