Multimerization of IAA3 via ROS suppresses lateral root formation in air gaps
Plant Science Research WeeklyRoot growth and branching is strongly tuned to environmental conditions including soil compaction, nutrient availability, and the presence of water, with auxin having a major role in regulating root architecture. Here, Roy et al. have demonstrated how auxin contributes to a suppression of root branching…
Tissue-specific interference reveals complex roles for auxin signalling in procambial cells during graft healing in Arabidopsis
Plant Science Research WeeklyFor hundreds of years, we have propagated plants clonally by grafting, i.e. the union of a scion and a rootstock to form a new plant. To be successful, a graft junction must heal: tissues must attach, and vascular bundles reconnect, in a process known to involve auxin. Here, Serivichyasw at et al. investigate…
Guanylate cyclase activity of TIR1/AFB auxin receptors in rapid auxin responses
Plant Science Research WeeklyAuxin is a pleiotropic plant hormone with diverse functions, many of which are mediated through transcriptional reprograming. However, some auxin responses occur extremely rapidly, ruling out changes in transcription as a mechanism. In 2022, one of the components of an auxin receptor, F-box protein TIR1/AFB,…
No auxin signaling, no organogenesis
The Plant Cell: In a NutshellSuzuki et al. examine the effects of auxin signaling on development of the liverwort Marchantia polymorpha.
Hidemasa Suzuki, Hirotaka Kato, Megumi Iwano, Ryuichi Nishihama, Takayuki Kohchi
Background: Land plants alternate diploid (2n) and haploid (n) generations. The plant hormone auxin regulates…