29 レタス種子発芽の温度反応におけるABAとGAの働き

概要

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The inhibition of seed germination at supraoptimal temperature is called thermoinhibition. The thermoinhibition at 28℃ of lettuce seed germination was rescued with fiuridone, an ABA mhibitor. At 33℃, an application of exogenous GA with fluridone was needed for inducing the germination. This application decreased ABAcontents of the seeds to the levels of those at 18℃, an optimal temperature for germination. In addition, the elevated temperatures made the seeds more sensitive to ABA. In contrast to ABA, no significant difference was observed between GA_1 levels at 18℃ and 33℃. These results indicate that ABA, but not GA, plays the crucial role in regulation of lettuce seed germination at supraoptimal temperatures in the dark.
植物化学調節学会の論文
2001-10-09