Genetic control of floral zygomorphy in pea (Pisum sativum L.)

Zheng Wang, Yonghai Luo, Xin Li, Liping Wang, Shilei Xu, Jun Yang, Lin Weng, Shusei Sato, Satoshi Tabata, Mike Ambrose, Catherine Rameau, Xianzhong Feng, Xiaohe Hu, Da Luo

Research output: Contribution to journalArticlepeer-review

157 Citations (Scopus)


Floral zygomorphy (flowers with bilateral symmetry) has multiple origins and typically manifests two kinds of asymmetries, dorsoventral (DV) and organ internal (IN) asymmetries in floral and organ planes, respectively, revealing the underlying key regulators in plant genomes that generate and superimpose various mechanisms to build up complexity and different floral forms during plant development. In this study, we investigate the loci affecting these asymmetries during the development of floral zygomorphy in pea (Pisum sativum L.). Two genes, LOBED STANDARD 1 (LST1) and KEELED WINGS (K), were cloned that encode TCP transcription factors and have divergent functions to constitute the DV asymmetry. A previously undescribed regulator, SYMMETRIC PETALS 1 (SYP1), has been isolated as controlling IN asymmetry. Genetic analysis demonstrates that DV and IN asymmetries could be controlled independently by the two kinds of regulators in pea, and their interactions help to specify the type of zygomorphy. Based on the genetic analysis in pea, we suggest that variation in both the functions and interactions of these regulators could give rise to the wide spectrum of floral symmetries among legume species and other flowering plants.

Original languageEnglish
Pages (from-to)10414-10419
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number30
Publication statusPublished - 2008 Jul 29
Externally publishedYes


  • Dorsoventral asymmetry
  • Organ internal asymmetry
  • Symmetric petal

ASJC Scopus subject areas

  • General


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