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当前位置: 首页 > 文章 > 水稻白叶枯病成株抗性与过氧化氢含量及几种酶活性变化的关系 植物病理学报 2004,34 (4) 340-345
Position: Home > Articles > The change in hydrogen peroxide content and enzyme activity related to adult plant (resistance) to Rice bacterial blight Acta Phytopathologica Sinica 2004,34 (4) 340-345

水稻白叶枯病成株抗性与过氧化氢含量及几种酶活性变化的关系

作  者：
沙爱华;黄俊斌;林兴华;张端品
单  位：
华中农业大学作物遗传改良国家重点实验室国家农作物分子技术育种中心
关键词：
水稻;白叶枯病;成株抗性;H2O2;酶活性变化
摘  要：
分析了水稻白叶枯病成株抗性与过氧化氢 (H2 O2 )含量及过氧化物酶 (POD)、多酚氧化酶 (PPO)、超氧化物歧化酶(SOD)和过氧化氢酶 (CAT)活性变化的关系。试验结果表明 :接种白叶枯病菌T7133后 ,苗期与成株期植株体内H2 O2 含量上升以及POD、PPO和SOD活性增加。与苗期叶片相比 ,成株期叶片H2 O2 含量高 ,且PPO和SOD的酶活性增强 ,而POD的酶活性则降低。苗期和成株期CAT的酶活性均低于对照 ,成株期比苗期CAT活性更低。这些结果表明 ,H2 O2 、PPO、SOD和CAT可能与水稻白叶枯病成株抗性之间存在一定的关联 ,而POD则没有直接关系
译  名：
The change in hydrogen peroxide content and enzyme activity related to adult plant (resistance) to Rice bacterial blight
作  者：
SHA Ai-hua, HUANG Jun-bin, LIN Xing-hua, (ZHANG Duan-pin (National) Key Laboratory of Crop Genetic Improvement, National Center of Crop Molecular Breeding, Huazhong Agricultural University, Wuhan 430070, China)
关键词：
Rice (Oryzae sativa); bacterial blight; adult plant resistance; H_2O_2; enzyme activity
摘  要：
The concentration of hydrogen peroxide (H_2O_2) and the activities of peroxidase (POD), polyphenol oxidase (PPO), superoxide dismutase (SOD) and catalase (CAT) were measured in rice leaves inoculated with Xanthomonas oryzae pv. oryzae T7133 or water at seedling and adult plant stage, respectively. Inoculation with T7133 on leaves of both seedlings and adult plants resulted in an increase in the concentration of H_2O_2 and the activities of POD, PPO, and SOD. The concentration of H_2O_2 and the activities of PPO and SOD were higher in adult plants than in seedlings, whereas the POD activity was lower. The activity of CAT in leaves of both seedlings and adult plants inoculated with T7133 was lower than that in water-treated control, and the adult plants showed much lower activity compared to the seedlings. The results suggest the involvement of H_2O_2, PPO, SOD, and CAT, but not of POD, in adult plant resistance against rice bacterial blight.

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