葡萄品种对霜霉病抗性鉴定的生化指标研究

 通过盆栽接种和田间自然发病鉴定,从22个供试葡萄品种中鉴定筛选到1个高抗霜霉病的品种超藤和8个中抗品种饭刚黑、信浓乐、弗雷无核、黑蜜、优选皮奥萘、高妻、京秀、峰后。相关性分析表明,22个供试葡萄品种接种前和接种后2d,PPO、PAL活性和CAT比活性与霜霉病病情指数呈极显著负相关,SOD活性与霜霉病病情指数相关不显著。PPO、PAL活性和CAT比活性与葡萄品种对霜霉病的抗性呈极显著正相关,可利用这3种酶的活性作为葡萄品种霜霉病抗性鉴定的辅助评价指标。

Biochemical indexes for resistance estimation of grape variety to downy mildew

One highly resistant variety, Fujiminori, and eight moderately resistant varieties, are Fan-ganghei, Shingno Smile , Flame Seedless , Heimi, Youxuanpiaonai, Gaoqi, Jingxiu and Fenghou were selected from 22 grape varieties tested through the inoculation test in pots and natural infection experiments in field. There was very significantly negative correlation between disease indexes of downy mildew and several enzyme activities including PPO and PAL as well as CAT specific activity in these 22 varieties tested before or after inoculation. But SOD enzyme activity was not quite correlated with disease index of grape downy mildew. PPO and PAL enzyme activities and CAT specific activity of grape were related to its resistance of downy mildew significantly. The results suggested that these three enzyme activities could be used as one of indexes for resistance estimation of grape to downy mildew.