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Loss of function at RAE2 , a previously unidentified EPFL, is required for awnlessness in cultivated Asian rice

2016; National Academy of Sciences; Volume: 113; Issue: 32 Linguagem: Inglês

10.1073/pnas.1604849113

1091-6490

Kanako Bessho‐Uehara, Diane Wang, Tomoyuki Furuta, Anzu Minami, Keisuke Nagai, Rico Gamuyao, Kenji Asano, Rosalyn B. Angeles‐Shim, Yoshihiro Shimizu, Madoka Ayano, Norio Komeda, Kazuyuki Doi, Kotaro Miura, Yosuke Toda, Toshinori Kinoshita, Satohiro Okuda, Tetsuya Higashiyama, Mika Nomoto, Yasuomi Tada, Hidefumi Shinohara, Yoshikatsu Matsubayashi, Anthony J. Greenberg, Jian Wu, Hideshi Yasui, Atsushi Yoshimura, Hitoshi Mori, Susan R. McCouch, Motoyuki Ashikari,

Plant nutrient uptake and metabolism

Significance This study investigates a previously unidentified cysteine-rich peptide (CRP). CRPs have diverse roles in plant growth and development, such as control of stomata density and guidance of pollen-tube elongation. Despite numerous studies on CRPs in Arabidopsis thaliana , there are still many peptides with unknown function. We identify a previously unidentified rice CRP named Regulator of Awn Elongation 2 (RAE2) and show that it is cleaved specifically in the spikelet to promote awn elongation. We demonstrate that RAE2 was a target of selection during domestication, contributing to loss of awns in Asian but not African rice. The discovery of RAE2 simultaneously deepens our understanding of plant developmental pathways and lends insight into the complex processes underlying cereal domestication.