土壤理化因素对香蕉枯萎病菌生长和侵染的影响  

Effects of soil physi-chemical factors on growth and infection of banana fusarium wilt pathogen Fusarium oxysporum f. sp. cubense

作　　者：黄永辉[1,2] 陈琦光[2] 迟远丽[1] 杨媚[2] 周而勋[2] 

机构地区：[1]珠海出入境检验检疫局技术中心,珠海519015 [2]华南农业大学农学院,广州510642

出　　处：《华中农业大学学报》2016年第2期30-34,共5页Journal of Huazhong Agricultural University

基　　金：国家现代农业(香蕉)产业技术体系建设专项(CARS-32)

摘　　要：为探明土壤理化因素对香蕉枯萎病菌的影响，在实验室条件下，以尖镰孢古巴专化型4号生理小种（Fusarium oxysporum f. sp. cubense race 4,Foc 4）菌株为对象，模拟不同的土壤类型、温度、含水量和pH值等条件，观察和分析这些因子对凡c4生长和侵染的影响。结果表明，Foc4在土壤中生长的最适条件为：土壤温度25℃，含水量达到30％和偏酸性条件（pH4～5）；在盆栽试验中，RK4的最佳侵染条件为：温度30℃，偏酸性（pH3～5）的土壤环境。In order to verify the effects of soil physi-chemieal factors on the banana tusarmm wilt pathogen （Fusarium oacysporum f. sp. cubense race 4,Foc 4）, various soil physi-chemical factors inclu- ding soil types, temperature, water content and pH value were simulated under laboratory conditions, and the effects on the growth and infection of Foc 4 were observed and analyzed. The results showed that the optimal growth conditions for Foc 4 were at 25 ℃ with higher soil moisture of 30%and acidic pH value of 4 to 5 in soil; whereas the optimal infection conditions of Foc 4 to banana plantlets were at 30 ℃ and in the acidic soil environment （pH 3 to 5） in the pot experiments.

关 键 词：香蕉枯萎病菌 土壤理化因素 菌丝生长 侵染 

分 类 号：S436.67[农业科学—农业昆虫与害虫防治] S668.1[农业科学—植物保护]