甲壳胺诱导辣椒抗辣椒疫病的研究  

Induced Resistance of Pepper to Phytophthora capsici with Chitosan

作　　者：初佳佳[1,2] 李长松[2] 徐作珽[2] 李林[2] 齐军山[2] 张博[2] 李宝笃[1] 

机构地区：[1]青岛农业大学农学与植物保护学院,山东青岛266109 [2]山东省农业科学院植物保护研究所,山东济南250100

出　　处：《山东农业科学》2010年第9期70-72,共3页Shandong Agricultural Sciences

基　　金：国家科技支撑计划"设施菜地污染综合防控技术集成与示范(2006BAD17B07)";"沿南四湖南水北调过水区农业面源污染高效防控技术研究与示范(2007BAD87B05)";"园艺作物有害生物控制与安全生产关键技术研究(2006BAD07B02)";山东省农业科学院创新基金"山东省植物主要土传病害生物防治技术研究(2007ycx022)";"山东优势出口农产品产地立体污染阻控关键技术与生态安全(2007ycx023-03)"

摘　　要：通过体外抑菌测定和盆栽生物测定研究了甲壳胺诱导辣椒抗辣椒疫病的效果。体外抑菌测定结果表明:甲壳胺对辣椒疫霉菌丝生长有很强的抑制作用。在50 mg/L浓度下,甲壳胺对菌丝生长先表现出促进作用但最终表现出抑制作用;浓度达到400 mg/L和800 mg/L时,对菌丝生长的抑制分别达到83.75%和89.77%。盆栽生物测定结果表明:利用甲壳胺诱导辣椒抗疫病的最佳施药浓度为12 000×叶/20 000×根。The induction effect of chitosan on resistance of pepper to Phytophthora capsici was studied by the microbial inhibitory determination in vitro and pot bioassay.The microbial inhibitory determination results showed that chitosan could strongly inhibit the mycelium growth of P.capsici.At the concentration of 50 mg/L,the mycelium growth was promoted at first but inhibited at last.At the concentrations of 400 and 800 mg/L,the inhibition rates were 83.75% and 89.77% respectively.The pot bioassay results showed that the 12 000 times of chitosan for foliar application and 20 000 times of chitosan for root irrigation could get the best induction effect.

关 键 词：甲壳胺 诱导抗性 辣椒疫病 

分 类 号：S436.418.19[农业科学—农业昆虫与害虫防治]