Valiya Kadavu, Abdul Kareem
- University of Sydney
Abstract
Plants continuously produce lateral organs, such as leaves and flowers, from the shoot apical meristem (SAM). This process is guided by the accumulation of the plant hormone auxin and the polar localization of the efflux protein PIN-FORMED1 (PIN1). The transcription factor MONOPTEROS (MP) plays a crucial role in orienting PIN1 polarity, thereby facilitating auxin-driven organogenesis. In this study, we investigate genes downstream of MP that may regulate PIN1 polarity and organogenesis, discovering that the downstream vascular transcription factor TMO5 can promote PIN1 polarity convergence non-cell-autonomously and that TMO5 and its family members promote organ initiation in the SAM. By examining the role of auxin and cytokinin downstream of these genes, we provide evidence that the TMO5-like genes control PIN1 polarity and drive organogenesis by coordinating multiple hormonal signalling pathways.
Keywords
TMO5; Auxin; Cytokinin; Plant; Organogenesis
Published in
Development
2025, volume: 152, number: 24, article number: dev205255
Publisher: COMPANY BIOLOGISTS LTD
SLU Authors
UKÄ Subject classification
Developmental Biology
Publication identifier
- DOI: https://doi.org/10.1242/dev.205255
Permanent link to this page (URI)
https://res.slu.se/id/publ/145992