摘要
用水杨酸(SA)预处理水稻幼苗,能够提高水稻幼苗的抗寒性。0.5 mmol/L SA预处理水稻幼苗降低了低温胁迫期间水稻幼苗体内过氧化氢(H2O2)和丙二醛(MDA)的含量及超氧阴离子(O2-.)的产生速率;同时酶活性分析表明,SA预处理后水稻幼苗在低温胁迫下超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性较低温对照上升,而抗坏血酸过氧化物酶(APX)活性较低温对照下降。研究结果表明,常温下用0.5 mmol/L SA预处理水稻幼苗,提高了抗氧化酶的活性,从而提高了水稻幼苗的抗寒性。
Pretreatment of rice seedlings with salicylic acid （ SAI spray at 0.5 mmol/L decreased the concentrations of H2O2 and MDA and the rate of superoxide anion radicals in them under chilling stress. As compared with the chilling control, SOD （ superoxide dismutasel , POD （peroxidasel and CAT （catalasel activities increased while ADX （ascorbate peroxidasel activity decreased in the SA pretreatments under chilling stress. It is concluded that pretreatment of rice seedlings with SA at normal growth temperature may increase the activities of antioxidant enzymes, thus increasing their chilling tolerance.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2006年第1期29-32,36,共5页
Journal of Southwest Agricultural University
基金
重庆市科委资助项目(98-155)
重庆市作物品质改良重点实验室开放基金资助项目(2003-3)
关键词
水稻幼苗
低温
水杨酸
抗氧化酶系
Rice seedling
Chilling stress
Salicylic acid
Antioxidant enzyme
