7. 植物の低温傷害(冷害)のメカニズム(セミナー「低温と生物」)

概要

論文の詳細を見る
Many plant species indigenous to tropical and subtropical low lands are sensitive to chilling environment. Protracted exposure to low temperatures ranged above zero to 12℃ leads eventually cell death, although the cell injury is reversible at the initial stage. In mung bean seedlings, vacuolar membranes are found to be the most sensitive cellular site for chilling temperature. Dysfunction of the vacuolr proton pumps under low temperature due to the strong temperaturedependency of the enzymes and the time-dependent inactivation of the H^+-ATPase appears to cause the leakage of protons from vacuoles and leads an acidosis of the cytoplasms in the initial stage of chilling treatment, which is considered to be a determinant of cell injury.
低温生物工学会の論文
1992-10-20