42. 発芽刺激物質ストリゴラクトンの生合成・代謝関連遺伝子の探索

概要

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Root parasitic plants depend on their hosts for water and nutrients. The seeds of these parasites germinate when they receive stimulants secreted from roots of host and some non-host plants. To date, several germination stimulants, collectively called strigolactones, have been isolated, but their biosynthetic pathway has not been clarified. Recently, Arabidopsis thaliana was shown to be susceptible to root parasites including some Orobanche species and we have demonstrated that one of major germination stimulants produced by Arabidopsis is orobanchol. Therefore, microarray analysis was performed to identify genes involved in biosynthesis and metabolism of strigolactones in Arabidopsis. Two new P450 oxidases with unknown functions and an ABC transporter were identified as highly responsive to strigol treatment. Further analyses with using knock-out mutants of these genes are now in progress.
植物化学調節学会の論文
2005-10-13