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Author Zhuang H., Hong-Lei Wang, Zhang T., Xiao-Qin Zeng, Chen H., Zhong-Wei Wang, Zhang J., Zheng H., Tang J., Ying-Hua Ling, Zheng-Lin Yang, Guang-Hua He, Yun-Feng Li
Title <i>NONSTOP GLUMES1</i> Encodes a C2H2 Zinc Finger Protein That Regulates Spikelet Development in Rice.
Abstract:
The spikelet is an inflorescence structure unique to grasses. The molecular mechanisms underlying spikelet development and evolution are unclear. In this study, we characterized three allelic recessive mutants in rice (<i>Oryza sativa</i>): <i>nonstop glumes 1-1</i> (<i>nsg1-1</i>), <i>nsg1-2</i>, and <i>nsg1-3</i> In these mutants, organs such as the rudimentary glume, sterile lemma, palea, lodicule, and filament were elongated and/or widened, or transformed into lemma- and/or marginal region of the palea-like organs. <i>NSG1</i> encoded a member of the C2H2 zinc finger protein family and was expressed mainly in the organ primordia of the spikelet. In the <i>nsg1-1</i> mutant spikelet, <i>LHS1 DL</i>, and <i>MFO1</i> were ectopically expressed in two or more organs, including the rudimentary glume, sterile lemma, palea, lodicule, and stamen, whereas <i>G1</i> was downregulated in the rudimentary glume and sterile lemma. Furthermore, the NSG1 protein was able to bind to regulatory regions of <i>LHS1</i> and then recruit the corepressor TOPLESS-RELATED PROTEIN to repress expression by downregulating histone acetylation levels of the chromatin. The results suggest that <i>NSG1</i> plays a pivotal role in maintaining organ identities in the spikelet by repressing the expression of <i>LHS1</i>, <i>DL</i>, and <i>MFO1.</i>
Journal Plant Cell
Country China
Volume 32(2)
Pages 392-413
Year 2020
PubMed ID 31806675
PubMed Central ID 7008478
DOI 10.1105/tpc.19.00682
URL -
Relation
Gene ASP1 DL G1 LHS1 MFO1 NSG1 _ _
INSD -
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 -
/rice/oryzabase