氯钾离子共体诱导黄瓜对霜霉病抗性的研究  

Researches on resistance to downy mildew induced by copolymer of chlorine and potassium ions in cucumber

作　　者：云兴福[1] 杜俊卿[2] 马立国[1] 刘杰才[1] 霍秀文[1] 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010019 [2]呼和浩特职业学院,呼和浩特010051

出　　处：《中国生态农业学报》2007年第1期105-108,共4页Chinese Journal of Eco-Agriculture

基　　金：内蒙古自然科学基金项目(200308020312);呼和浩特市科技攻关项目资助

摘　　要：在黄瓜幼苗子叶期及第一真叶期用浓度为2g／kg、5g／kg、10g／kg、15g／kg、20g／kg的氯钾离子共体液进行诱导处理，可使黄瓜植株产生对霜霉病[Pseudoperonospor cubensis（Berk．et Curt．）Rostov．]的抗病性。在自然病原激发病害试验中，经2g／kg、5g／kg、10g／kg、15g／kg、20g／kg浓度的氯钾离子共体液诱导处理的植株比对照植株推迟发病3～6d，平均病株率分别比对照降低25．26％、26．63％、31．46％、39．12％和33．38％，平均病叶率分别比对照降低22．89％、28．08％、34．02％、38．36％和36．59％，平均病情指数分别比对照降低18．32％、28．97％、34．80％、35．89％和36．77％，差异达极显著水平，平均相对免疫效果分别为31．99％、43．75％、51．23％、53．43％和53．70％。在人工接种病原激发病害试验中，自诱导后第6d接种各处理浓度的平均病情指数分别比对照降低38．51％、44．86％、40．81％、43．00％和43．33％，且与对照的差异均达到极显著水平。植株产生对霜霉病诱导抗性的迟滞期为2～4d，潜育期为7～9d，诱导抗性保持的有效期达27d。氯钾离子共体液诱导处理的最佳浓度为10g／kg和15g／kg。The resistance to downy mildew [ Pseudoperonospor cubensis （Berk. et Curt. ）Rostov. ] of cucumber can be induced when the cucumber seedlings are treated by the copolymer of chlorine and potassium ions with 2g/kg, 5g/kg, 10g/kg, 15g/kg and 20g/kg concentration at the stages of cotyledon and first true leaf. In the experiment of a natural disease infection, the disease in treated plants is observed 3 to 6 days later. The mean rates of disease plants which are induced by copolymer of chlorine and potassium ions with 2g/kg, 5g/kg, 10g/kg, 15g/kg and 20g/kg concentration are 25.26 %, 26.63 %, 31.46 %, 39.12 % and 33.38 % lower than those of the control, respectively; the mean rates of disease leaf are 22.89 % , 28.08 % ,34.02 % , 38.36 % , and 36.59 % iower. The mean disease indexes are 18.32 % , 28.97 %, 34.80 % 35.89% and 36.77% lower with significant differences between the treatments and the control. The mean relative immunization efficiencies are 31.99% ,43.75% ,51.23% ,53.43% and 53.70%, respectively. In experiment of an artificially inoculated disease infection, the mean disease indexes are 38.51%, 44.86 %, 40.81%, 43.00 % and 43.33 % lower than those of the control, respectively;and the most significant differences between the treatments and the control are attained. The lag period of the induced resistance to downy mildew of cucumber is 2 - 4 days, the latent period is 7 - 9 days, the protection period of induced resistance is 27days. In addition, the study shows that the optimum concentration of the copolymer of chlorine and potassium ions are 10g/kg and 15g/kg.

关 键 词：氯钾离子共体 黄瓜霜霉病 诱导抗性 

分 类 号：S828.3[农业科学—畜牧学]