Characterization of strigolactones exuded by Asteraceae plantsReport as inadecuate

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Plant Growth Regulation

, Volume 65, Issue 3, pp 495–504

First Online: 12 August 2011Received: 08 March 2011Accepted: 04 August 2011


Strigolactones SLs, originally characterized as germination stimulants for root parasitic weeds, are now recognized as hyphal branching factors for symbiotic arbuscular mycorrhizal fungi and as a novel class of plant hormones inhibiting shoot branching. In the present study, SLs in root exudates of 13 Asteraceae plants including crops, a weed, and ornamental plants were characterized. High performance liquid chromatography-tandem mass spectrometry LC–MS-MS analyses revealed that all the Asteraceae plants examined exuded known SLs and, except for sunflower Helianthus annuus, high germination stimulant activities at retention times corresponding to these SLs were confirmed. The two major SLs exuded by these Asteraceae plants were orobanchyl acetate and orobanchol. 5-Deoxystrigol and 7-hydroxyorobanchyl acetate were detected in root exudates from several Asteraceae species examined in this study.

KeywordsAsteraceae Germination stimulant Root parasitic weed Strigolactone AbbreviationsAMArbuscular mycorrhizal

HPLCHigh performance liquid chromatography

LC–MS-MSLiquid chromatography-tandem mass spectrometry


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Author: Kaori Yoneyama - Xiaonan Xie - Takaya Kisugi - Takahito Nomura - Hitoshi Sekimoto - Takao Yokota - Koichi Yoneyama


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