The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.

The psi2 mutant of Arabidopsis displays amplification of the responses controlled by the red/far red light photoreceptors phytochrome A (phyA) and phytochrome B (phyB) but no apparent defect in blue light perception. We found that loss-of-function alleles of the protein phosphatase 7 (AtPP7) are res...

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Autores principales:	Thierry Genoud, Marcela Treviño Santa Cruz, Tea Kulisic, Francesca Sparla, Christian Fankhauser, Jean-Pierre Métraux
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7a7d98623c5841b8bc56501a5c19545d
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spelling	oai:doaj.org-article:7a7d98623c5841b8bc56501a5c19545d2021-11-25T06:11:37ZThe protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.1932-620310.1371/journal.pone.0002699https://doaj.org/article/7a7d98623c5841b8bc56501a5c19545d2008-07-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18628957/?tool=EBIhttps://doaj.org/toc/1932-6203The psi2 mutant of Arabidopsis displays amplification of the responses controlled by the red/far red light photoreceptors phytochrome A (phyA) and phytochrome B (phyB) but no apparent defect in blue light perception. We found that loss-of-function alleles of the protein phosphatase 7 (AtPP7) are responsible for the light hypersensitivity in psi2 demonstrating that AtPP7 controls the levels of phytochrome signaling. Plants expressing reduced levels of AtPP7 mRNA display reduced blue-light induced cryptochrome signaling but no noticeable deficiency in phytochrome signaling. Our genetic analysis suggests that phytochrome signaling is enhanced in the AtPP7 loss of function alleles, including in blue light, which masks the reduced cryptochrome signaling. AtPP7 has been found to interact both in yeast and in planta assays with nucleotide-diphosphate kinase 2 (NDPK2), a positive regulator of phytochrome signals. Analysis of ndpk2-psi2 double mutants suggests that NDPK2 plays a critical role in the AtPP7 regulation of the phytochrome pathway and identifies NDPK2 as an upstream element involved in the modulation of the salicylic acid (SA)-dependent defense pathway by light. Thus, cryptochrome- and phytochrome-specific light signals synchronously control their relative contribution to the regulation of plant development. Interestingly, PP7 and NDPK are also components of animal light signaling systems.Thierry GenoudMarcela Treviño Santa CruzTea KulisicFrancesca SparlaChristian FankhauserJean-Pierre MétrauxPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 7, p e2699 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Thierry Genoud Marcela Treviño Santa Cruz Tea Kulisic Francesca Sparla Christian Fankhauser Jean-Pierre Métraux The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.
description	The psi2 mutant of Arabidopsis displays amplification of the responses controlled by the red/far red light photoreceptors phytochrome A (phyA) and phytochrome B (phyB) but no apparent defect in blue light perception. We found that loss-of-function alleles of the protein phosphatase 7 (AtPP7) are responsible for the light hypersensitivity in psi2 demonstrating that AtPP7 controls the levels of phytochrome signaling. Plants expressing reduced levels of AtPP7 mRNA display reduced blue-light induced cryptochrome signaling but no noticeable deficiency in phytochrome signaling. Our genetic analysis suggests that phytochrome signaling is enhanced in the AtPP7 loss of function alleles, including in blue light, which masks the reduced cryptochrome signaling. AtPP7 has been found to interact both in yeast and in planta assays with nucleotide-diphosphate kinase 2 (NDPK2), a positive regulator of phytochrome signals. Analysis of ndpk2-psi2 double mutants suggests that NDPK2 plays a critical role in the AtPP7 regulation of the phytochrome pathway and identifies NDPK2 as an upstream element involved in the modulation of the salicylic acid (SA)-dependent defense pathway by light. Thus, cryptochrome- and phytochrome-specific light signals synchronously control their relative contribution to the regulation of plant development. Interestingly, PP7 and NDPK are also components of animal light signaling systems.
format	article
author	Thierry Genoud Marcela Treviño Santa Cruz Tea Kulisic Francesca Sparla Christian Fankhauser Jean-Pierre Métraux
author_facet	Thierry Genoud Marcela Treviño Santa Cruz Tea Kulisic Francesca Sparla Christian Fankhauser Jean-Pierre Métraux
author_sort	Thierry Genoud
title	The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.
title_short	The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.
title_full	The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.
title_fullStr	The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.
title_full_unstemmed	The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.
title_sort	protein phosphatase 7 regulates phytochrome signaling in arabidopsis.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/7a7d98623c5841b8bc56501a5c19545d
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The protein phosphatase 7 regulates phytochrome signaling in Arabidopsis.

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