ヒメツリガネゴケアブシジン酸低感受性変異株の耐凍性変化(平成18年度第52回低温生物工学会年会)

概要

論文の詳細を見る
Many types of plant cells accumulate low molecular-weight soluble sugars when they acquire freezing tolerance in the process of cold acclimation. Protonema cells of the moss Physcomitrella patens develop freezing tolerance upon treatment with the phytohormone abscisic acid (ABA). We previously reported that the ABA-treated protonema cells accumulate low molecular-weight soluble sugars such as sucrose and theanderose. To clarify mechanisms underlying physiological processes leading to development of freezing tolerance, we isolated F patens mutant lines, AR1 to AR7, with reduced sensitivity to ABA. Among these lines, AR7 showed growth similar to wild type but did not develop freezing tolerance by ABA treatment. Analysis of low molecular-weight soluble sugars indicated that the AR7 cells accumulated sucrose upon ABA treatment but very little of theanderose.
2006-12-30