About: Spatially and genetically distinct control of seed germination by phytochromes A and B

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://genesdev.cshlp.org/content/26/17/1984
Description	Phytochromes phyB and phyA mediate a remarkable developmental switch whereby, early upon seed imbibition, canopy light prevents phyB-dependent germination, whereas, later on, it stimulates phyA-dependent germination. Using a seed coat bedding assay where the growth of dissected embryos is monitored under the influence of dissected endosperm, allowing combinatorial use of mutant embryos and endosperm, we show that canopy light specifically inactivates phyB activity in the endosperm to override phyA-dependent signaling in the embryo. This interference involves abscisic acid (ABA) release from the endosperm and distinct spatial activities of phytochrome signaling components. Under the canopy, endospermic ABA opposes phyA signaling through the transcription factor (TF) ABI5, which shares with the TF PIF1 several target genes that negatively regulate germination in the embryo. ABI5 enhances the expression of phytochrome signaling genes PIF1, SOMNUS, GAI, and RGA, but also of ABA and gibberellic acid (GA) metabolic genes. Over time, weaker ABA-dependent responses eventually enable phyA-dependent germination, a distinct type of germination driven solely by embryonic growth. Phytochromes phyB and phyA mediate a remarkable developmental switch whereby, early upon seed imbibition, canopy light prevents phyB-dependent germination, whereas, later on, it stimulates phyA-dependent germination. Using a seed coat bedding assay where the growth of dissected embryos is monitored under the influence of dissected endosperm, allowing combinatorial use of mutant embryos and endosperm, we show that canopy light specifically inactivates phyB activity in the endosperm to override phyA-dependent signaling in the embryo. This interference involves abscisic acid (ABA) release from the endosperm and distinct spatial activities of phytochrome signaling components. Under the canopy, endospermic ABA opposes phyA signaling through the transcription factor (TF) ABI5, which shares with the TF PIF1 several target genes that negatively regulate germination in the embryo. ABI5 enhances the expression of phytochrome signaling genes PIF1, SOMNUS, GAI, and RGA, but also of ABA and gibberellic acid (GA) metabolic genes. Over time, weaker ABA-dependent responses eventually enable phyA-dependent germination, a distinct type of germination driven solely by embryonic growth. (en)
Title	Spatially and genetically distinct control of seed germination by phytochromes A and B Spatially and genetically distinct control of seed germination by phytochromes A and B (en)
skos:prefLabel	Spatially and genetically distinct control of seed germination by phytochromes A and B Spatially and genetically distinct control of seed germination by phytochromes A and B (en)
skos:notation	RIV/61989592:15310/12:33142812!RIV13-TA0-15310___
http://linked.open...avai/predkladatel	Přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(KAN200380801), P(TA01010861), Z(AV0Z50380511)
http://linked.open...iv/cisloPeriodika	17
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Strnad, Miroslav Turečková, Veronika
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	170186
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/12:33142812
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	seed germination; phyB; phyA; abscisic acid; DELLA factors; ABI5 (en)
http://linked.open.../riv/klicoveSlovo	seed germination ABI5 DELLA factors phyA phyB abscisic acid
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[69ED659AF053]
http://linked.open...i/riv/nazevZdroje	Genes & Development
http://linked.open...in/vavai/riv/obor	EB
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Immunonanotechnologies for hormone diagnostic Research, testing and production of targeted growth regulators, new fertilizers and combined formulations for crop production
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	26
http://linked.open...iv/tvurceVysledku	Strnad, Miroslav Turečková, Veronika Carat, Solenne Chappuis, Richard Fankhauser, Christian Lee, Keun Pyo Lopez-Molina, Luis Piskurewicz, Urszula
http://linked.open...ain/vavai/riv/wos	000308391800009
http://linked.open...n/vavai/riv/zamer	Mechanismy regulace růstu a vývoje rostlin na úrovni buněk, orgánů a celých organismů: fyziologické, genetické a molekulárně biologické základy
issn	0890-9369
number of pages	13 (xsd:int)
http://bibframe.org/vocab/doi	10.1101/gad.194266.112
http://localhost/t...ganizacniJednotka	15310
is http://linked.open...avai/riv/vysledek of	Spatially and genetically distinct control of seed germination by phytochromes A and B

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