2024-03-29T08:08:17Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00024659
2023-01-16T04:30:25Z
1179:2033:2034
SMALL ORGAN SIZE 1 and SMALL ORGAN SIZE 2/DWARF AND LOW-TILLERING Form a Complex to Integrate Auxin and Brassinosteroid Signaling in Rice
Hirano, Ko
73073
Yoshida, Hideki
73074
Aya, Koichiro
73075
Kawamura, Mayuko
73076
Hayashi, Makoto
73077
Hobo, Tokunori
73078
Sato-Izawa, Kanna
73079
Kitano, Hidemi
73080
Ueguchi-Tanaka, Miyako
73081
Matsuoka, Makoto
73082
auxin
brassinosteroid
crosstalk
rice
transcription factor
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 article
Elsevier
2017-04-03
application/pdf
Molecular Plant
4
10
590
604
https://doi.org/10.1016/j.molp.2016.12.013
http://hdl.handle.net/2237/26880
1674-2052
https://nagoya.repo.nii.ac.jp/record/24659/files/Mol_Plant_170104.pdf
eng
https://doi.org/10.1016/j.molp.2016.12.013
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/