Please use this identifier to cite or link to this item: https://doi.org/10.1104/pp.108.121301
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dc.titleGlobal identification of DELLA target genes during arabidopsis flower development
dc.contributor.authorHou, X.
dc.contributor.authorHu, W.-W.
dc.contributor.authorShen, L.
dc.contributor.authorLee, L.Y.C.
dc.contributor.authorTao, Z.
dc.contributor.authorHan, J.-H.
dc.contributor.authorYu, H.
dc.date.accessioned2014-10-27T08:29:33Z
dc.date.available2014-10-27T08:29:33Z
dc.date.issued2008-07
dc.identifier.citationHou, X., Hu, W.-W., Shen, L., Lee, L.Y.C., Tao, Z., Han, J.-H., Yu, H. (2008-07). Global identification of DELLA target genes during arabidopsis flower development. Plant Physiology 147 (3) : 1126-1142. ScholarBank@NUS Repository. https://doi.org/10.1104/pp.108.121301
dc.identifier.issn00320889
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/100774
dc.description.abstractGibberellin (GA) plays important roles in regulating many aspects of plant development. GA derepresses its signaling pathway by promoting the degradation of DELLA proteins, a family of nuclear growth repressors. Although the floral organ identity is established in flowers of the GA-deficient mutant ga1-3, the growth of all floral organs is severely retarded. In particular, abortive anther development in ga1-3 results in male sterility. Genetic analysis has revealed that various combinations of null mutants of DELLA proteins could gradually rescue floral organ defects in ga1-3 and that RGA is the most important DELLA protein involved in floral organ development. To elucidate the early molecular events controlled by RGA during flower development, we performed whole-genome microarray analysis to identify genes in response to the steroid-inducible activation of RGA in ga1-3 rgl2 rga 35S:RGA-GR. Although DELLA proteins were suggested as transcriptional repressors, similar numbers of genes were down-regulated or up-regulated by RGA during floral organ development. More than one-third of RGA down-regulated genes were specifically or predominantly expressed in stamens. A significant number of RGA-regulated genes are involved in phytohormone signaling or stress response. Further expression analysis through activation of RGA by steroid induction combined with cycloheximide identified eight genes as immediate targets of RGA. In situ hybridization and transgenic studies further showed that the expression pattern and function of several selected genes were consistent with the predictions from microarray analysis. These results suggest that DELLA regulation of floral organ development is modulated by multiple phytohormones and stress signaling pathways. © 2008 American Society of Plant Biologists.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1104/pp.108.121301
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentBIOLOGICAL SCIENCES
dc.description.doi10.1104/pp.108.121301
dc.description.sourcetitlePlant Physiology
dc.description.volume147
dc.description.issue3
dc.description.page1126-1142
dc.description.codenPLPHA
dc.identifier.isiut000257454000017
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