水分胁迫对苹果梨叶片活性氧代谢的影响

Effect of Water Stress on SOD and MDA in Leaves of “Pingguoli” Pear

摘要:

研究了水分胁迫对苹果梨叶片SOD、MDA含量的影响。结果表明,田间苹果梨叶片SOD含量先增后减,覆草一直呈现平稳上升趋势,且低于其他3个处理;水分胁迫使其MDA含量增加,增加幅度为干旱>浇水>覆草。盆栽苹果梨水分胁迫使叶片SOD含量先增后减,增加幅度为重度胁迫>中度胁迫>轻度胁迫,重度胁迫处理的SOD含量后期比对照低;MDA含量增加,增加幅度为重度胁迫>中度胁迫>轻度胁迫;短期恢复灌水后,重度胁迫恢复慢甚至很难恢复。

Abstract:

Effect of water stress on SOD and MDA in leaves of "Pingguoli" pear was studied.In field trials,SOD of the control increased at first and then decreased,while that of the grass mulching trees increased steadily in the season and was the lowest among all treatments.MDA was also increased by water stress.The drought treatment increased the most,irrigation treatment the second and grass mulching treatment the least.In Studies with pot-cultivated trees,Sod increased at first and then decreased in water stress treatment.The heavier the stress,the more SOD increased.SOD of severe water stress trees was lower than the control in late of season.MDA was also increased by water stress.The heavier the stress,the more MDA increased.The severe water stress trees could not easily recovered.