Plants grown under dense canopies perceive through the phytochrome system a reduction in the ratio of red to far-red light as a warning of competition, and this triggers a series of morphological changes to avoid shade. Several phytochrome signaling intermediates acting as positive regulators of accelerated elongation growth and induction of flowering in shade avoidance have been identified. Here we report that a negative regulatory mechanism ensures that in the presence of far-red-rich light an exaggerated plant response does not occur. Strikingly, this unpredicted negative regulatory mechanism is centrally involved in the attenuation of virtually all plant responses to canopy shade.

A dynamic balance between gene activation and repression regulates the shade avoidance response in Arabidopsis / G., Sessa; M., Carabelli; M., Sassi; Ciolfi, Andrea; M., Possenti; F., Mittempergher; J., Becker; G., Morelli; I., Ruberti. - In: GENES & DEVELOPMENT. - ISSN 0890-9369. - 19:23(2005), pp. 2811-2815. [10.1101/gad.364005]

A dynamic balance between gene activation and repression regulates the shade avoidance response in Arabidopsis.

CIOLFI, ANDREA;SASSI, Massimiliano
2005

Abstract

Plants grown under dense canopies perceive through the phytochrome system a reduction in the ratio of red to far-red light as a warning of competition, and this triggers a series of morphological changes to avoid shade. Several phytochrome signaling intermediates acting as positive regulators of accelerated elongation growth and induction of flowering in shade avoidance have been identified. Here we report that a negative regulatory mechanism ensures that in the presence of far-red-rich light an exaggerated plant response does not occur. Strikingly, this unpredicted negative regulatory mechanism is centrally involved in the attenuation of virtually all plant responses to canopy shade.
2005
adaptation; arabidopsis; arabidopsis proteins; dna-binding proteins; ecosystem; gene expression regulation; genetics; genetics/growth /&/ development/physiology; homeodomain proteins; light; nuclear proteins; physiological; physiology; phytochrome; plant; signal transduction; transcription factors; transcriptional activation
01 Pubblicazione su rivista::01a Articolo in rivista
A dynamic balance between gene activation and repression regulates the shade avoidance response in Arabidopsis / G., Sessa; M., Carabelli; M., Sassi; Ciolfi, Andrea; M., Possenti; F., Mittempergher; J., Becker; G., Morelli; I., Ruberti. - In: GENES & DEVELOPMENT. - ISSN 0890-9369. - 19:23(2005), pp. 2811-2815. [10.1101/gad.364005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/509397
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