42 ヤセウツボ(Orobanche minor)種子の発芽応答と内生ABAの関係

概要

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Seeds of Orobanche minor Sm., a root parasite, have special germination requirements, including pretreatment (conditioning in a warm moist environments for several days prior to exposure to exogenous germination stimulants. Temperature has been shown to affect germination response of the parasite seeds. In particular, when the seeds were exposed to supraoptimal temperatures (over 30℃) during conditioning period, germination induced by dl-strigol decreased dramatically. This inhibition by supraoptimal temperatures could be partially recovered by adding an inhibition of ABA biosynthesis, fluridone, or GA_3 to the incubation media. However, there was no clear relationships between endgenous ABA levels quantified by LC/MS/MS and germination response. Therefore, endogenous GAs seem to play an important role in seed germination of the parasite.
植物化学調節学会の論文
2000-11-02