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Dernière mise à jour : Mai 2018

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Institut Sophia Agrobiotech

UMR INRA - Univ. Nice Sophia Antipolis - Cnrs

Cell cycle controls and Plant Plasticity in a changing environment

Tuesday, june 11 - 11:00 - Sophia Antipolis - Inra PACA - Room A010

Scientific seminar
As part of the scientific animation of Institut Sophia Agrobiotech, IPN team invites Adriana Hemerly, professor at the Federal University of Rio de Janeiro.


Plants are constantly challenged by fluctuations in their environment, responding to abiotic and biotic stimulus, that generate adaptive responses to improve growth. The modular and indeterminate construction of the plant body allows the self-perpetuating meristems to be shaped by developmental and environmental signals, imposing an accurate balance of cell division and cell differentiation, to produce organs with the correct form. Our group identified a regulatory network that connects DNA replication and transcription machineries, integrating plant growth with environmental signaling.
This network is involved in the control of the fine balance between cell proliferation and differentiation at meristems, by acting as a negative regulator of cell divisions. Different partners possibly take up diverse functions depending on the developmental and environmental context. Phenotypic analysis of plant mutants revealed that organogenesis might be accelerated by speeding cell divisions, as well as by activating stem cell proliferation and the provision of differentiating cells; to finally develop organs with increased cell numbers and biomass. Gene expression profile suggests that plant metabolic pathways are being regulated and might be involved in environmental responses. Altogether our data indicates that during plant development this gene network integrates cell division and external signaling controls, to generate plants better adapted to a changing environment.