Title : The regulation of DWARF4 expression is likely a critical mechanism in maintaining the homeostasis of bioactive brassinosteroids in Arabidopsis.

Pub. Date : 2006 Feb

PMID : 16407451






6 Functional Relationships(s)
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1 The regulation of DWARF4 expression is likely a critical mechanism in maintaining the homeostasis of bioactive brassinosteroids in Arabidopsis. Brassinosteroids Cytochrome P450 superfamily protein Arabidopsis thaliana
2 Arabidopsis (Arabidopsis thaliana) DWARF4 (DWF4) catalyzes a flux-determining step in the BR biosynthetic pathways. Brassinosteroids Cytochrome P450 superfamily protein Arabidopsis thaliana
3 Arabidopsis (Arabidopsis thaliana) DWARF4 (DWF4) catalyzes a flux-determining step in the BR biosynthetic pathways. Brassinosteroids Cytochrome P450 superfamily protein Arabidopsis thaliana
4 Thus, it is hypothesized that the tissues of DWF4 expression may represent the sites of BR biosynthesis in Arabidopsis. Brassinosteroids Cytochrome P450 superfamily protein Arabidopsis thaliana
5 DWF4:GUS activity was increased by treatment with brassinazole, a BR biosynthetic inhibitor, and decreased by exogenous application of bioactive BRs. Brassinosteroids Cytochrome P450 superfamily protein Arabidopsis thaliana
6 Thus, it is likely that the DWF4 promoter serves as a focal point in maintaining homeostasis of endogenous bioactive BR pools in specific tissues of Arabidopsis. Brassinosteroids Cytochrome P450 superfamily protein Arabidopsis thaliana