Genetic control of compound leaf development in the mungbean (Vigna radiata L.)

Genetics: Leaf architecture gene evolved early in legume plants A legume gene involved in determining the spatial pattern of leaflets seems to have evolved this function earlier than previously thought. Xin Li from Nanjing Agricultural University, China, and coworkers studied a mutant variety of mungbean in which the plant’s leaves display a simple architecture instead of the usual compound arrangement, with several leaflets joined to a single stem. They discovered a mutation in the mungbean version of a gene called LEAFY. This gene, together with others, proved pivotal in compound leaf development in mungbeans. The results run counter to prior data showing that, outside of a small group of related legume species, LEAFY plays only to play a minor role in compound leaf development in these agriculturally important plants. The findings could thus inform breeding efforts in legumes generally.