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Pàgina inicial > Articles > Articles publicats > Chloroplasts modulate elongation responses to canopy shade by retrograde pathways involving HY5 and abscisic acid |
Data: | 2019 |
Resum: | Plants use light as energy for photosynthesis but also as a signal of competing vegetation. Using different concentrations of norflurazon and lincomycin, we found that the response to canopy shade in Arabidopsis (Arabidopsis thaliana) was repressed even when inhibitors only caused a modest reduction in the level of photosynthetic pigments. High inhibitor concentrations resulted in albino seedlings that were unable to elongate when exposed to shade, in part due to attenuated light perception and signaling via phytochrome B and phytochrome-interacting factors. The response to shade was further repressed by a retrograde network with two separate nodes represented by the transcription factor LONG HYPOCOTYL 5 and the carotenoid-derived hormone abscisic acid. The unveiled connection among chloroplast status, light (shade) signaling, and developmental responses should contribute to achieve optimal photosynthetic performance under light-changing conditions. |
Ajuts: | Ministerio de Ciencia e Innovación BIO2017-84041-P Ministerio de Ciencia e Innovación BIO2017-85316-R Ministerio de Ciencia e Innovación BIO2017-90877-REDT Ministerio de Ciencia e Innovación BIO2015-71703-REDT Ministerio de Ciencia e Innovación BIO2014-59092-P Ministerio de Ciencia e Innovación BIO2014-59895-P Ministerio de Economía y Competitividad SEV-2015-0533 Ministerio de Economía y Competitividad BES-2012-052597 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-1211 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-710 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Publicat a: | The Plant Cell, Vol. 31, issue 2 (Feb. 2019) , p. 384-398, ISSN 1040-4651 |
Postprint 33 p, 1.8 MB |