Regulation of Strigolactone Biosynthesis by Gibberellin Signaling

Overview

Journal Plant Physiol

Specialty Physiology

Date 2017 Apr 14

PMID 28404726

Citations 63

Authors

Shinsaku Ito

Daichi Yamagami

Mikihisa Umehara

Atsushi Hanada

Satoko Yoshida

Yasuyuki Sasaki

Shunsuke Yajima

Junko Kyozuka

Miyako Ueguchi-Tanaka

Makoto Matsuoka

Ken Shirasu

Shinjiro Yamaguchi

Tadao Asami

Affiliations

Soon will be listed here.

Abstract

Strigolactones (SLs) are a class of plant hormones that regulate diverse physiological processes, including shoot branching and root development. They also act as rhizosphere signaling molecules to stimulate the germination of root parasitic weeds and the branching of arbuscular mycorrhizal fungi. Although various types of cross talk between SLs and other hormones have been reported in physiological analyses, the cross talk between gibberellin (GA) and SLs is poorly understood. We screened for chemicals that regulate the level of SLs in rice () and identified GA as, to our knowledge, a novel SL-regulating molecule. The regulation of SL biosynthesis by GA is dependent on the GA receptor GID1 and F-box protein GID2. GA treatment also reduced the infection of rice plants by the parasitic plant witchers weed (). These data not only demonstrate, to our knowledge, the novel plant hormone cross talk between SL and GA, but also suggest that GA can be used to control parasitic weed infections.

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