Circadian autonomy and rhythmic precision of the Arabidopsis female reproductive organ
Okada, Masaaki (Centre de Recerca en Agrigenòmica)
Yang, Zhiyuan (Centre de Recerca en Agrigenòmica)
Mas, Paloma (Centre de Recerca en Agrigenòmica)

Data:	2022
Resum:	The plant circadian clock regulates essential biological processes including flowering time or petal movement. However, little is known about how the clock functions in flowers. Here, we identified the circadian components and transcriptional networks contributing to the generation of rhythms in pistils, the female reproductive organ. When detached from the rest of the flower, pistils sustain highly precise rhythms, indicating organ-specific circadian autonomy. Analyses of clock mutants and chromatin immunoprecipitation assays showed distinct expression patterns and specific regulatory functions for clock activators and repressors in pistils. Genetic interaction studies also suggested a hierarchy of the repressing activities that provide robustness and precision to the pistil clock. Globally, the circadian function in pistils primarily governs responses to environmental stimuli and photosynthesis and controls pistil growth and seed weight and production. Understanding the circadian intricacies in reproductive organs may prove useful for optimizing plant reproduction and productivity.
Ajuts:	Agencia Estatal de Investigación PID2019-106653GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1211 Ministerio de Economía y Competitividad CEX2019-000902-S
Nota:	Altres ajuts: CERCA Programme/Generalitat de Catalunya, "Severo Ochoa" Internationalization Postdoctoral Program fellowship
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Circadian clock ; Flower ; Pistil ; Transcriptional networks ; Arabidopsis thaliana
Publicat a:	Developmental cell, Vol. 57, Issue 18 (September 2022) , p. 2168-2180, ISSN 1878-1551

DOI: 10.1016/j.devcel.2022.08.013

Postprint 30 p, 954.0 KB

Supplementary material 8 p, 2.5 MB

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