Journal
NATURE PLANTS
Volume 6, Issue 9, Pages 1146-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41477-020-0749-5
Keywords
-
Categories
Funding
- Singapore National Research Foundation Investigatorship Programme [NRFNRFI2016-02]
- Agency for Science, Technology and Research (A*STAR) under its Industry Alignment Fund-Pre-Positioning (IAF-PP) [A19D9a0096]
- National University of Singapore
- Temasek Life Sciences Laboratory
Ask authors/readers for more resources
Seed size is a pivotal agronomic trait that links plant sexual reproduction and subsequent seedling establishment, and is affected by the timing of endosperm cellularization following endosperm proliferation after double fertilization. The molecular switch that controls the timing of endosperm cellularization has so far been largely unclear. Here, we report that theArabidopsisTERMINAL FLOWER1 (TFL1) is a mobile regulator generated in the chalazal endosperm, and moves to the syncytial peripheral endosperm to mediate timely endosperm cellularization and seed size through stabilizing ABSCISIC ACID INSENSITIVE 5. We further show that Ras-related nuclear GTPases interact with TFL1 and regulate its trafficking to the syncytial peripheral endosperm. Our findings reveal TFL1 as an essential molecular switch for regulating endosperm cellularization and seed size. Generation of mobile TFL1 in the chalazal endosperm, which is close to maternal vascular tissues, could provide a hitherto-unknown means to control seed development by mother plants. TERMINAL FLOWER1 (TFL1) is key factor that controls flowering time and inflorescence meristem identity. Here, the researchers assign a new role to TFL1 of seed size determination by regulating the timing of endosperm cellularization.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available