| Literature DB >> 21316795 |
Yaju Liu1, Yunyuan Xu, Jun Xiao, Qibin Ma, Dan Li, Zhen Xue, Kang Chong.
Abstract
The A20/AN1 zinc-finger proteins (ZFPs) play pivotal roles in animal immune responses and plant stress responses. From previous gibberellin (GA) microarray data and A20/AN1 ZFP family member association, we chose Oryza sativa dwarf rice with overexpression of gibberellin-induced gene (OsDOG) to examine its function in the GA pathway. OsDOG was induced by gibberellic acid (GA(3)) and repressed by the GA-synthesis inhibitor paclobutrazol. Different transgenic lines with constitutive expression of OsDOG showed dwarf phenotypes due to deficiency of cell elongation. Additional GA(1) and real-time PCR quantitative assay analyses confirmed that the decrease of GA(1) in the overexpression lines resulted from reduced expression of GA3ox2 and enhanced expression of GA2ox1 and GA2ox3. Adding exogenous GA rescued the constitutive expression phenotypes of the transgenic lines. OsDOG has a novel function in regulating GA homeostasis and in negative maintenance of plant cell elongation in rice.Entities:
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Year: 2011 PMID： 21316795 DOI： 10.1016/j.jplph.2010.12.013
Source DB: PubMed Journal: J Plant Physiol ISSN： 0176-1617 Impact factor: 3.549