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hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierDept Cell & Syst Biol
dc.contributor.authorDELMAS, Frédéric
hal.structure.identifierUniversity of Calgary
dc.contributor.authorSANKARANARAYANAN, Subramanian
hal.structure.identifierUniversity of Calgary
dc.contributor.authorDEB, Srijani
hal.structure.identifierUniversity of Calgary
dc.contributor.authorWIDDUP, Ellen
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorBOURNONVILLE, Celine
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorBOLLIER, Norbert
hal.structure.identifierDept Cell & Syst Biol
dc.contributor.authorNORTHEY, Julian G. B.
hal.structure.identifierDept Cell & Syst Biol
dc.contributor.authorMCCOURT, Peter
hal.structure.identifierUniversity of Calgary
dc.contributor.authorSAMUEL, Marcus A.
dc.date.issued2013
dc.identifier.issn0027-8424
dc.description.abstractEnChlorophyll (chl) is essential for light capture and is the starting point that provides the energy for photosynthesis and thus plant growth. Obviously, for this reason, retention of the green chlorophyll pigment is considered a desirable crop trait. However, the presence of chlorophyll in mature seeds can be an undesirable trait that can affect seed maturation, seed oil quality, and meal quality. Occurrence of mature green seeds in oil crops such as canola and soybean due to unfavorable weather conditions during seed maturity is known to cause severe losses in revenue. One recently identified candidate that controls the chlorophyll degradation machinery is the stay-green gene, SGR1 that was mapped to Mendel's I locus responsible for cotyledon color (yellow versus green) in peas. A defect in SGR1 leads to leaf stay-green phenotypes in Arabidopsis and rice, but the role of SGR1 in seed degreening and the signaling machinery that converges on SGR1 have remained elusive. To decipher the gene regulatory network that controls degreening in Arabidopsis, we have used an embryo stay-green mutant to demonstrate that embryo degreening is achieved by the SGR family and that this whole process is regulated by the phytohormone abscisic acid (ABA) through ABSCISIC ACID INSENSITIVE 3 (ABI3); a B3 domain transcription factor that has a highly conserved and essential role in seed maturation, conferring desiccation tolerance. Misexpression of ABI3 was sufficient to rescue cold-induced green seed phenotype in Arabidopsis. This finding reveals a mechanistic role for ABI3 during seed degreening and thus targeting of this pathway could provide a solution to the green seed problem in various oil-seed crops.
dc.language.isoen
dc.publisherNational Academy of Sciences
dc.subjectPROTEIN
dc.subjectEXPRESSION
dc.subject.enfreezing tolerance
dc.subject.ennondormant
dc.subject.enCHLOROPHYLL CATABOLITE REDUCTASE
dc.subject.enARABIDOPSIS-THALIANA
dc.subject.enABSCISIC-ACID
dc.subject.enSTAY-GREEN
dc.subject.enFREEZING TOLERANCE
dc.subject.enSEED DEVELOPMENT
dc.subject.enLEAF SENESCENCE
dc.subject.enGENE
dc.title.enABI3 controls embryo degreening through Mendel's I locus
dc.typeArticle de revue
dc.identifier.doi10.1073/pnas.1308114110
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalProceedings of the National Academy of Sciences of the United States of America
bordeaux.pageE3888 - E3894
bordeaux.volume110
bordeaux.issue40
bordeaux.peerReviewedoui
hal.identifierhal-02646670
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02646670v1
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