A carlactonoic acid methyltransferase that contributes to the inhibition of shoot branching in Arabidopsis

SignificanceStrigolactones (SLs) are a group of apocarotenoid hormones, which regulates shoot branching and other diverse developmental processes in plants. The major bioactive form(s) of SLs as endogenous hormones has not yet been clarified. Here, we identify an methyltransferase, CLAMT, responsibl...

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Published in:Proceedings of the National Academy of Sciences - PNAS Vol. 119; no. 14; p. e2111565119
Main Authors: Mashiguchi, Kiyoshi, Seto, Yoshiya, Onozuka, Yuta, Suzuki, Sarina, Takemoto, Kiyoko, Wang, Yanting, Dong, Lemeng, Asami, Kei, Noda, Ryota, Kisugi, Takaya, Kitaoka, Naoki, Akiyama, Kohki, Bouwmeester, Harro, Yamaguchi, Shinjiro
Format: Journal Article
Language:English
Published: United States 05.04.2022
Subjects:
Arabidopsis - genetics
Arabidopsis - metabolism
Hormones - metabolism
Lactones - metabolism
Methyltransferases - genetics
Methyltransferases - metabolism
Plant Growth Regulators - metabolism
Plant Shoots - genetics
Plant Shoots - metabolism
terpenoid
strigolactone
biosynthesis
plant hormones
ISSN:1091-6490, 1091-6490
Online Access:Get more information
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Summary:SignificanceStrigolactones (SLs) are a group of apocarotenoid hormones, which regulates shoot branching and other diverse developmental processes in plants. The major bioactive form(s) of SLs as endogenous hormones has not yet been clarified. Here, we identify an methyltransferase, CLAMT, responsible for the conversion of an inactive precursor to a biologically active SL that can interact with the SL receptor in vitro. Reverse genetic analysis showed that this enzyme plays an essential role in inhibiting shoot branching. This mutant also contributed to specifying the SL-related metabolites that could move from root to shoot in grafting experiments. Our work has identified a key enzyme necessary for the production of the bioactive form(s) of SLs.
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ISSN:1091-6490
1091-6490
DOI:10.1073/pnas.2111565119