钕的不同作用方式对黄瓜抗枯萎病的效应  

Effects of Neodymium Application Mode on Resistance to Fusarium Wilts in Cucumbers

作　　者：张玉凤[1] 齐军山[2] 陈靠山[2] 董亮[1] 

机构地区：[1]山东省农业科学院土壤肥料研究所,山东济南250100 [2]山东大学生命科学学院

出　　处：《中国稀土学报》2006年第5期628-632,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家高技术研究发展计划(2002AA244031);中国博士后科学基金;山东省农科院青年科研基金

摘　　要：通过盆栽试验研究了钕的不同作用方式对黄瓜枯萎病发病情况、相关防御酶(苯丙氨酸解氨酶PAL、过氧化物酶POD、多酚氧化酶PPO)活性、氧自由基产生速率和木质素含量的影响。结果表明:喷10 mg.L-1Nd3+使黄瓜发病率降低,同时组、诱导组和治疗组的相对防效分别为7.51%,27.14%和11.51%;同时组、诱导组和治疗组的接种病原菌+喷钕处理(Nd+Fo)的PAL活性分别比相应接种病原菌处理(Fo)高9.86%,48.57%和4.97%;POD活性分别低27.52%,35.87%,7.67%;PPO活性分别高5.75%,36.58%和52.19%;氧自由基产生速率分别低9.49%,28.08%和25.21%;木质素含量分别高5.55%,5.25%和11.25%。相比较而言,在降低病情指数、提高PAL活性、降低POD活性和氧自由基产生速率方面,诱导作用效果最好;在提高PPO活性和木质素含量方面,治疗效果最好。The effects of neodymium application mode on the disease index, PAL, POD and PPO activity, content of lignin and generation rate of · O2^- in cucumbers were investigated by pot experiment. The resuits suggest that the disease index decreases after spraying Nd^3＋. Relative protection effects of at-the-same-time-group, induced-group and therapy-group are 7.51%, 27.14% and 11.51%. The PAL activity of Nd ＋ Fo treatment in at-the-same-time-group, induced-group and therapy-group increases by 9.86%, 48.57% and 4.97% respectively compared with that of Fo treatment. The POD activity decreases by 27.52%, 35.87% and 7.67%. The PPO activity in- creases by 5.75%, 36.58% and 52.19%. The ·O2^- generation rate decreases by 9.49%, 28.08% and 25.21%. The lignin content increases by 5.55%, 5.25% and 11.25%. In conclusion, induced-group has the best effect in decreasing disease index, decreasing · O2^- generation rate and increasing PAL and POD activity; therapy-group has the best effect in increasing PPO activity and content of lignin.

关 键 词：尖镰孢菌 钕的作用方式 黄瓜 稀士 

分 类 号：S432.2[农业科学—植物病理学]