חיפוש מתקדם
Physiologia Plantarum
Frenkel, C., Plant Science Dept., Rutgers - The State Univ., P.O. Box 231, New Brunswick, NJ 08903, United States
Erez, A., Institute of Horticulture, ARO the Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Five-day-old etiolated cucumber (Cucumis sativus L.) seedlings cv. Marketmore held at 2°C for 72 h developed chilling injury, resulting in desiccation and collapse of the hypocotyl tissue and eventual plant death. Hypoxia-induced accumulation of ethanol and acetaldehyde led to tolerance of subsequent chilling, as evidenced by continued hypocotyl growth and freedom from injury. Attenuated accumulation of volatiles by applied bisulfite reduced the development of hypoxia-induced chilling tolerance in seedlings. In seedlings held in normoxia cold tolerance was induced by applied ethanol vapors, whereas acetaldehyde had a marginal effect, suggesting that hypoxia-induced cold tolerance may arise from the accumulation and activity of ethanol. Cold tolerance was also induced by exposure of seedlings to volatile anesthetics including n-propanol, n-butanol, chloroform and halothane, suggesting that ethanol activity may result from fluidization of membrane lipids. This view is consistent with results which showed that ethanol activity was not associated with lipid metabolism. However, development of cold tolerance in ethanol-enriched tissues was time dependent, indicating that ethanol activity probably also entails biosynthetic event(s).
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Induction of chilling tolerance in cucumber (Cucumis sativus) seedlings by endogenous and applied ethanol
96
Frenkel, C., Plant Science Dept., Rutgers - The State Univ., P.O. Box 231, New Brunswick, NJ 08903, United States
Erez, A., Institute of Horticulture, ARO the Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Induction of chilling tolerance in cucumber (Cucumis sativus) seedlings by endogenous and applied ethanol
Five-day-old etiolated cucumber (Cucumis sativus L.) seedlings cv. Marketmore held at 2°C for 72 h developed chilling injury, resulting in desiccation and collapse of the hypocotyl tissue and eventual plant death. Hypoxia-induced accumulation of ethanol and acetaldehyde led to tolerance of subsequent chilling, as evidenced by continued hypocotyl growth and freedom from injury. Attenuated accumulation of volatiles by applied bisulfite reduced the development of hypoxia-induced chilling tolerance in seedlings. In seedlings held in normoxia cold tolerance was induced by applied ethanol vapors, whereas acetaldehyde had a marginal effect, suggesting that hypoxia-induced cold tolerance may arise from the accumulation and activity of ethanol. Cold tolerance was also induced by exposure of seedlings to volatile anesthetics including n-propanol, n-butanol, chloroform and halothane, suggesting that ethanol activity may result from fluidization of membrane lipids. This view is consistent with results which showed that ethanol activity was not associated with lipid metabolism. However, development of cold tolerance in ethanol-enriched tissues was time dependent, indicating that ethanol activity probably also entails biosynthetic event(s).
Scientific Publication
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