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Author Gong R., Cao H., Zhang J., Xie K., Wang D., Yu S.
Title Divergent functions of the GAGA-binding transcription factor family in rice.
OsGBPs are a small family of four genes in rice (Oryza sativa L.) that function as transcription factors recognizing the GAGA motif; however, their functions in plant growth and development remain unclear. Here we report the functions of OsGBPs in plant growth and grain development. Knock-down and knock-out of OsGBP1 promoted seedling growth and enhanced grain length, whereas overexpression of OsGBP1 exhibited the opposite effect on seedling growth and grain length, indicating that OsGBP1 repressed grain length and seedling growth. In addition, overexpression of OsGBP1 led to delayed flowering time and suppressed plant height. OsGBP1 could regulate OsLFL1 expression through binding to the (GA)12 element of its promoter. In contrast, OsGBP3 induced grain length and plant height. Grain length and plant height were decreased in OsGBP3RNAi lines and were increased in OsGBP3 overexpression lines. We also found a synergistic effect of these two genes on grain width and plant growth. RNAi of both OsGBP1 and OsGBP3 resulted in severe dwarfism, compared with RNAi of a single gene. These results suggest the presence of functional divergence of OsGBPs in the regulation of grain size and plant growth; these results enrich our understanding of the roles of GAGA-binding transcription factors in the regulatory pathways of plant development.
Journal Plant J.
Country China
Volume 94(1)
Pages 32-47
Year 2018
PubMed ID 29383786
PubMed Central ID -
DOI 10.1111/tpj.13837
Gene BC12 D11 EF1 GS2 GS5 GW2 HD3A HD5 LFL1 RFT1 SRS3 TID1 WFP _ _ _ _
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -