The Effect of Heat Acclimation on Cellular Membrane Thcrmostability in Wheat

doi:10.3321/j.issn:1000-7091.1993.03.007

Abstract

Abstract: Heat tolerance of wheat was studied by change of the amount of electrolyte leakage.The degree of heat tolerance was expressed by the heat killing time at 50℃ .Increased heat tolerance reached a peak after acclimation at 34℃ for 3 days.The heat-tolerant and heat-susceptible cultivars of wheat did not differ in killing time when the seedlings were grown at 20℃/15℃ (day/night) condition.Their heat killing times were between 6 to 26 minutes.However the difference became marked after acclimation at 34℃ for 3 days.The heat killing times of heat-tolerant cultivars (87-110 minutes) were dramatically higher than that of heat-susceptible ones (35-53 minutes).

Key words: Wheat, Heat acclimation, Heat tolerance, Membrane thermostability, Electrolyte leakage

Zhou Rengang, Fan Zhihe, Li Xiaozhi, Wang Zhanwu, Han Wei. The Effect of Heat Acclimation on Cellular Membrane Thcrmostability in Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1993, 8(3): 33-37. doi: 10.3321/j.issn:1000-7091.1993.03.007.

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