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食线虫真菌蠕虫埃斯特菌对植物寄生线虫的侵染特性
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引用本文:王婷婷,王暄,王金成,李鸿,李红梅.食线虫真菌蠕虫埃斯特菌对植物寄生线虫的侵染特性.植物保护学报,2014,41(5):540-546
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作者单位E-mail
王婷婷 南京农业大学植物保护学院, 农作物生物灾害综合治理教育部重点实验室, 南京210095  
王暄 南京农业大学植物保护学院, 农作物生物灾害综合治理教育部重点实验室, 南京210095  
王金成 天津出入境检验检疫局, 天津300461  
李鸿 南京农业大学植物保护学院, 农作物生物灾害综合治理教育部重点实验室, 南京210095  
李红梅 南京农业大学植物保护学院, 农作物生物灾害综合治理教育部重点实验室, 南京210095 lihm@njau.edu.cn 
中文摘要:为评价食线虫真菌蠕虫埃斯特菌Esteya vermicola菌株NKF 13222的生防应用价值,采用2%水琼脂培养基平板接种法测定了该菌株对7种植物寄生线虫的诱引、黏附和侵染能力,并比较了其对不同线虫的侵染特性.结果显示,该菌株的菌丝对松材线虫、拟松材线虫、腐烂茎线虫和水稻干尖线虫均有诱引作用,而对南方根结线虫、禾谷孢囊线虫和穿刺短体线虫无诱引作用;菌株的粘性分生孢子对有诱引现象的4种线虫都能黏附,接种24 h后的黏附率达到82%~99%,对无诱引现象的3种线虫不能黏附;粘性分生孢子黏附虫体后对不同线虫的侵染力存在差异,接种7 d后的松材线虫死亡率可达98%,而拟松材线虫、腐烂茎线虫和水稻干尖线虫死亡率分别为43%、35%和9%.表明蠕虫埃斯特菌不仅是松材线虫的强内寄生真菌,而且对其它重要植物寄生线虫也具有一定的应用潜力.
中文关键词:食线虫真菌  蠕虫埃斯特菌  黏附  侵染  植物寄生线虫
 
Infection characteristics of nematophagous fungus Esteya vermicola to plant parasitic nematodes
Author NameAffiliationE-mail
Wang Tingting Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education
College of Plan Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China 
 
Wang Xuan Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education
College of Plan Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China 
 
Wang Jincheng Tianjin Entry-Exit Inspection and Quarantine Bureau, Tianjin 300461, China  
Li Hong Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education
College of Plan Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China 
 
Li Hongmei Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education
College of Plan Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China 
lihm@njau.edu.cn 
Abstract:In order to explore the biocontrol potency of the nematophagous fungus Esteya vermicola strain NKF 13222, the characteristics of attraction, attachment and infection towards seven plant parasitic nematodes were evaluated by inoculating nematodes on 2% water agar plates with fungus. The results showed that the mycelia of strain NKF 13222 attracted the juveniles of Bursaphelenchus xylophilus, B.mucronatus, Ditylenchus destructor and Aphelenchoides besseyi instead of Meloidogyne incognita, Heterodera avenae and Pratylenchus penetrans. Lunate conidia of strain NKF 13222 were found to be attached on the bodies of four attracted nematode species 24 hours after inoculation, and their rate of attachment ranged between 82%-99%, while no attachments were observed in case of non-attracted nematode species. The infection ability of lunate conidia varied significantly among different nematode species. The infection rates of spores for B.xylophilus, B.mucronatus, D.destructor and A.besseyi were 98%, 43%, 35% and 9% at seventh day after inoculation, respectively. The study proved that E.vermicola strain NKF 13222 not only had a high infectivity against B.xylophilus, but could act as an alternative biocontrol agent for some other plant parasitic nematodes.
keywords:nematophagous fungus  Esteya vermicola  attachment  infection  plant parasitic nematodes
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