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Peer-reviewedCC BYLegume Science

Genome‐Wide Identification of YABBY Genes in Medicago truncatula Reveals a Role for MtYAB3 in Petal Lateral Expansion

  • Xue Zhang1,2
  • Jingyi Han2
  • Siqin Zhang2
  • Zhichao Lu2
  • Jing Zhang2
  • Feng Yuan3
  • Yaling Liu3
  • Chuanen Zhou2
  • Lu Han2
  1. 1Advanced Medical Research Institute, Cheeloo College of Medicine Shandong University Jinan China
  2. 2The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Science Shandong University Qingdao China
  3. 3National Technology Innovation Center for Prataculture Hohhot China
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Abstract

YABBY transcription factors are plant‐specific regulators of lateral organ development, yet their functions in legume flower morphogenesis remain poorly understood. Here, we identified seven YABBY genes in the Medicago truncatula genome and assigned them to five conserved subfamilies. Among the two FIL ‐clade members, MtFIL and MtYAB3 , both showed preferential expression in shoot apices and reproductive tissues, but only loss of MtYAB3 caused an obvious floral phenotype. In the mtyab3‐1 mutant, keel and wing petals were markedly narrower and petal fusion was impaired, whereas early petal primordium initiation showed no obvious abnormality. Complementation restored the mutant phenotype, supporting the conclusion that disruption of MtYAB3 was responsible for the floral defects. GUS staining and RNA in situ hybridization further showed that MtYAB3 is expressed in floral tissues with clear abaxial polarity during organ development. In addition, several genes associated with cell proliferation and expansion were differentially expressed in mtyab3‐1 . These results identify MtYAB3 as an important regulator of petal lateral growth in M. truncatula and provide a useful framework for understanding petal morphogenesis in legumes.

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Cite

BibTeXRIS
BibTeX
@article{zhang2026genomewide,
  title = {{Genome‐Wide Identification of YABBY Genes in Medicago truncatula Reveals a Role for MtYAB3 in Petal Lateral Expansion}},
  author = {Xue Zhang and Jingyi Han and Siqin Zhang and Zhichao Lu and Jing Zhang and Feng Yuan and Yaling Liu and Chuanen Zhou and Lu Han},
  journal = {Legume Science},
  year = {2026},
  month = sep,
  doi = {10.1002/leg3.70147},
  url = {https://doi.org/10.1002/leg3.70147},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Genome‐Wide Identification of YABBY Genes in Medicago truncatula Reveals a Role for MtYAB3 in Petal Lateral Expansion
AU  - Xue Zhang
AU  - Jingyi Han
AU  - Siqin Zhang
AU  - Zhichao Lu
AU  - Jing Zhang
AU  - Feng Yuan
AU  - Yaling Liu
AU  - Chuanen Zhou
AU  - Lu Han
PY  - 2026
DA  - 2026/09/01
JO  - Legume Science
DO  - 10.1002/leg3.70147
UR  - https://doi.org/10.1002/leg3.70147
AB  - YABBY transcription factors are plant‐specific regulators of lateral organ development, yet their functions in legume flower morphogenesis remain poorly understood. Here, we identified seven YABBY genes in the Medicago truncatula genome and assigned them to five conserved subfamilies. Among the two FIL ‐clade members, MtFIL and MtYAB3 , both showed preferential expression in shoot apices and reproductive tissues, but only loss of MtYAB3 caused an obvious floral phenotype. In the mtyab3‐1 mutant, keel and wing petals were markedly narrower and petal fusion was impaired, whereas early petal primordium initiation showed no obvious abnormality. Complementation restored the mutant phenotype, supporting the conclusion that disruption of MtYAB3 was responsible for the floral defects. GUS staining and RNA in situ hybridization further showed that MtYAB3 is expressed in floral tissues with clear abaxial polarity during organ development. In addition, several genes associated with cell proliferation and expansion were differentially expressed in mtyab3‐1 . These results identify MtYAB3 as an important regulator of petal lateral growth in M. truncatula and provide a useful framework for understanding petal morphogenesis in legumes.
SN  - 2639-6181
ER  -