A network of CLAVATA receptors buffers auxin-dependent meristem maintenance.

Autor: John A; Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA., Smith ES; Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA., Jones DS; Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.; Department of Biological Sciences, Auburn University, Auburn, AL, USA., Soyars CL; Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.; Thermo Fisher Scientific, Raleigh, NC, USA., Nimchuk ZL; Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. zackn@email.unc.edu.; Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. zackn@email.unc.edu.
Jazyk: angličtina
Zdroj: Nature plants [Nat Plants] 2023 Aug; Vol. 9 (8), pp. 1306-1317. Date of Electronic Publication: 2023 Aug 07.
DOI: 10.1038/s41477-023-01485-y
Abstrakt: Plant body plans are elaborated in response to both environmental and endogenous cues. How these inputs intersect to promote growth and development remains poorly understood. During reproductive development, central zone stem cell proliferation in inflorescence meristems is negatively regulated by the CLAVATA3 (CLV3) peptide signalling pathway. In contrast, floral primordia formation on meristem flanks requires the hormone auxin. Here we show that CLV3 signalling is also necessary for auxin-dependent floral primordia generation and that this function is partially masked by both inflorescence fasciation and heat-induced auxin biosynthesis. Stem cell regulation by CLAVATA signalling is separable from primordia formation but is also sensitized to temperature and auxin levels. In addition, we uncover a novel role for the CLV3 receptor CLAVATA1 in auxin-dependent meristem maintenance in cooler environments. As such, CLV3 signalling buffers multiple auxin-dependent shoot processes across divergent thermal environments, with opposing effects on cell proliferation in different meristem regions.
(© 2023. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
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