BIGGER ORGANS and ELEPHANT EAR-LIKE LEAF1 control organ size and floral organ internal asymmetry in pea

• DOI: 10.1093/jxb/ery352
• Publication Date: 2018-10-04T16:30:16Z
• Authors: Xin Li; Wei Liu; Lili Zhuang; Yang Zhu; Fang Wang; Tao Chen; Jun Yang; Mike Ambrose; Zhubing Hu; James L Weller; Da Luo
• Keywords: Petal

Control of organ size and shape by cell proliferation expansion is a fundamental process during plant development, but the molecular mechanisms that set final determinate organs in plants remain unclear, especially legumes. In this study, we characterized several mutants including bigger (bio) elephant-ear-like leaf 1 (ele1) pea displayed similar phenotypes, with enlarged leaves symmetrical lateral ventral petals. Genetic analysis showed BIO interacted specific regulators SYMMETRICAL PETAL1 (SYP1) SYP5 to control floral internal asymmetry pea. Using comparative approach, cloned ELE1, revealing they encode KIX domain protein an ortholog Arabidopsis PEAPOD (PPD), respectively. Furthermore, genetic analysis, physical interaction assays, gene expression ELE1 physically interact each other transcription factor LATHYROIDES (LATH) repress downstream genes such as GROWTH-REGULATING-FACTOR 5. Our data show BIO-ELE1 module legumes plays key role regulating development create distinct forms characteristic shape.