施钾马铃薯叶片对桃蚜的诱导抗性反应
Effect of potassium on the induced resistance response of two potato varieties to Myzus persicae
白雪,马晓林,李惠君 ,郭永明,任琴
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DOI：
作者单位：集宁师范学院内蒙古012000
中文关键词：钾肥， 马铃薯， 茉莉酸， 桃蚜
英文关键词：potassium, Solanum tuberosum, jasmonic acid, Myzus persicae
中文摘要：
本文研究了施钾条件下马铃薯两品种克新和费乌瑞它对桃蚜Myzus persicae Sulzer的抗性反应。结果表明，与对照相比，虫害、施钾与施钾+虫害处理均使两马铃薯品种中茉莉酸含量、脂氧合酶活性、蛋白酶抑制剂活性有所提高。其中虫害处理后克新中茉莉酸含量为对照的22倍，
PI活性、脂氧合酶活性分别比对照增加了277%和373%；虫害费乌瑞它中上述生理指标的变化与克新一致，茉莉酸含量为对照的17倍，PI活性、脂氧合酶活性分别比对照增加了224%和291%。此外，施钾处理显著降低了克新和费乌瑞它2个品种的为害蚜量。表明施钾提高了马
铃薯的诱导抗性，且克新的抗虫能力高于费乌瑞它。
英文摘要：
The effect of potassium (K) on the resistance response of two potato varieties, kexin and favorita, to aphids was studied. The results show that compared with the controls, jasmonic acid (JA) levels, lipoxygenase (LOX) activities and protease inhibitors (PI) of the two different varieties were increased by aphid feeding, potassium and potassium + feeding,
respectively. Jasmonic acid levels of kexin plants fed on by aphids were 22 times higher than the control and PI and lipoxygenase activity were 277% and 373% higher, respectively. Similar results were obtained from the favorita variety; jasmonic acid levels were 17 times higher than the control and PI and lipoxygenase activity increased by 224% and 29
1%, respectively. In addition, providing potato plants of both varieties with potassium significantly reduced the number of aphids feeding on them. Potassium enhanced the induced resistance of potatoes and this resistance was stronger in kexin than in favorita plants.