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Author Hirano K., Yoshida H., Aya K., Kawamura M., Hayashi M., Hobo T., Sato-Izawa K., Kitano H., Ueguchi-Tanaka M., Matsuoka M.
Title SMALL ORGAN SIZE 1 and SMALL ORGAN SIZE 2/DWARF AND LOW-TILLERING Form a Complex to Integrate Auxin and Brassinosteroid Signaling in Rice.
Abstract:
Although auxin and brassinosteroid (BR) synergistically control various plant responses, the molecular mechanism underlying the auxin-BR crosstalk is not well understood. We previously identified SMOS1, an auxin-regulated APETALA2-type transcription factor, as the causal gene of the small organ size 1 (SMOS1) mutant that is characterized by a decreased final size of various organs in rice. In this study, we identified another smos mutant, SMOS2, which shows the phenotype indistinguishable from SMOS1. SMOS2 was identical to the previously reported DWARF AND LOW-TILLERING (DLT), which encodes a GRAS protein involved in BR signaling. SMOS1 and SMOS2/DLT physically interact to cooperatively enhance transcriptional transactivation activity in yeast and in rice nuclei. Consistently, the expression of OsPHI-1, a direct target of SMOS1, is upregulated only when SMOS1 and SMOS2/DLT proteins are both present in rice cells. Taken together, our results suggest that SMOS1 and SMOS2/DLT form a keystone complex on auxin-BR signaling crosstalk in rice.
Journal Mol Plant
Country unknown
Volume 10(4)
Pages 590-604
Year 2017
PubMed ID 28069545
PubMed Central ID -
DOI 10.1016/j.molp.2016.12.013
URL -
Relation
Gene DLT GRAS10 GRAS26 GRAS37 GRAS4 GRAS7 IAA3 NGR5 NSP2 PHI1 SHR1 SLR1
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 -
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