Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.

Protein phosphatase 2A (PP2A) consists of three types of subunits: a catalytic (C), a scaffolding (A), and a regulatory (B) subunit. In Arabidopsis thaliana and other organisms the regulatory B subunits are divided into at least three non-related groups, B55, B' and B″. Flowering time in plants...

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Autores principales:	Behzad Heidari, Dugassa Nemie-Feyissa, Saijaliisa Kangasjärvi, Cathrine Lillo
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6fe47878614e43a0bfeeb08a98affa63
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spelling	oai:doaj.org-article:6fe47878614e43a0bfeeb08a98affa632021-11-18T09:02:31ZAntagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.1932-620310.1371/journal.pone.0067987https://doaj.org/article/6fe47878614e43a0bfeeb08a98affa632013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23976921/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Protein phosphatase 2A (PP2A) consists of three types of subunits: a catalytic (C), a scaffolding (A), and a regulatory (B) subunit. In Arabidopsis thaliana and other organisms the regulatory B subunits are divided into at least three non-related groups, B55, B' and B″. Flowering time in plants mutated in B55 or B' genes were investigated in this work. The PP2A-b55α and PP2A-b55β (knockout) lines showed earlier flowering than WT, whereas a PP2A-b'γ (knockdown) line showed late flowering. Average advancements of flowering in PP2A-b55 mutants were 3.4 days in continuous light, 6.6 days in 12 h days, and 8.2 days in 8 h days. Average delays in the PP2A-b'γ mutant line were 7.1 days in 16 h days and 4.7 days in 8 h days. Expression of marker genes of genetically distinct flowering pathways (CO, FLC, MYB33, SPL3), and the floral integrator (FT, SOC1) were tested in WT, pp2a mutants, and two known flowering time mutants elf6 and edm2. The results are compatible with B55 acting at and/or downstream of the floral integrator, in a non-identified pathway. B' γ was involved in repression of FLC, the main flowering repressor gene. For B'γ the results are consistent with the subunit being a component in the major autonomous flowering pathway. In conclusion PP2A is both a positive and negative regulator of flowering time, depending on the type of regulatory subunit involved.Behzad HeidariDugassa Nemie-FeyissaSaijaliisa KangasjärviCathrine LilloPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 7, p e67987 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Behzad Heidari Dugassa Nemie-Feyissa Saijaliisa Kangasjärvi Cathrine Lillo Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.
description	Protein phosphatase 2A (PP2A) consists of three types of subunits: a catalytic (C), a scaffolding (A), and a regulatory (B) subunit. In Arabidopsis thaliana and other organisms the regulatory B subunits are divided into at least three non-related groups, B55, B' and B″. Flowering time in plants mutated in B55 or B' genes were investigated in this work. The PP2A-b55α and PP2A-b55β (knockout) lines showed earlier flowering than WT, whereas a PP2A-b'γ (knockdown) line showed late flowering. Average advancements of flowering in PP2A-b55 mutants were 3.4 days in continuous light, 6.6 days in 12 h days, and 8.2 days in 8 h days. Average delays in the PP2A-b'γ mutant line were 7.1 days in 16 h days and 4.7 days in 8 h days. Expression of marker genes of genetically distinct flowering pathways (CO, FLC, MYB33, SPL3), and the floral integrator (FT, SOC1) were tested in WT, pp2a mutants, and two known flowering time mutants elf6 and edm2. The results are compatible with B55 acting at and/or downstream of the floral integrator, in a non-identified pathway. B' γ was involved in repression of FLC, the main flowering repressor gene. For B'γ the results are consistent with the subunit being a component in the major autonomous flowering pathway. In conclusion PP2A is both a positive and negative regulator of flowering time, depending on the type of regulatory subunit involved.
format	article
author	Behzad Heidari Dugassa Nemie-Feyissa Saijaliisa Kangasjärvi Cathrine Lillo
author_facet	Behzad Heidari Dugassa Nemie-Feyissa Saijaliisa Kangasjärvi Cathrine Lillo
author_sort	Behzad Heidari
title	Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.
title_short	Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.
title_full	Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.
title_fullStr	Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.
title_full_unstemmed	Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.
title_sort	antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2a.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/6fe47878614e43a0bfeeb08a98affa63
work_keys_str_mv	AT behzadheidari antagonisticregulationoffloweringtimethroughdistinctregulatorysubunitsofproteinphosphatase2a AT dugassanemiefeyissa antagonisticregulationoffloweringtimethroughdistinctregulatorysubunitsofproteinphosphatase2a AT saijaliisakangasjarvi antagonisticregulationoffloweringtimethroughdistinctregulatorysubunitsofproteinphosphatase2a AT cathrinelillo antagonisticregulationoffloweringtimethroughdistinctregulatorysubunitsofproteinphosphatase2a
_version_	1718420969275523072

Antagonistic regulation of flowering time through distinct regulatory subunits of protein phosphatase 2A.

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