Production of Strigolactones by Arabidopsis thaliana responsible for Orobanche aegyptiaca seed germination |
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Authors: | Yaakov Goldwasser Kaori Yoneyama Xiaonan Xie Koichi Yoneyama |
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Institution: | (1) R.H. Smith Institute of Plant Sciences & Genetics in Agriculture, Faculty of Agricultural, Food & Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot, 76100, Israel;(2) Weed Science Centre, Utsunomiya University, Utsunomiya 321-8505, Japan |
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Abstract: | The germination stimulants produced by Arabidopsis thaliana, a host of root parasitic plants Orobanche spp. but not of arbuscular mycorrhizal (AM) fungi were examined. Root exudates from the hydroponically grown A. thaliana plants were subjected to reverse phase high performance liquid chromatography (HPLC) and retention times of germination stimulants
inducing O. aegyptiaca seed germination were compared with those of strigolactone standards. In addition, the root exudates were analyzed by using
HPLC linked with tandem mass spectrometry (LC/MS/MS). A. thaliana was found to exude at least three different germination stimulants of which one was identified as orobanchol. This is the
first report of strigolactone production by a non-mycotrophic plant. These results together with recent knowledge imply that
strigolactones have other unrevealed functions in plant growth and development. |
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Keywords: | Arbuscular mycorrhizal fungi Brassicaceae Germination stimulant Orobanchol Root parasitic plants |
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