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Arbuscular Mycorrhizal Fungal Inoculation Enhances Suppression of Cucumber Fusarium Wilt in Greenhouse Soils

Pedosphere 2010年第5期20卷 586-593页

作者： HU Jun-Li LIN Xian-Gui WANG Jun-Hua SHEN Wei-Shou WU Shu PENG Su-Ping MAO Ting-Ting State Key Laboratory of Soil and Sustainable Agriculture Joint Open Laboratory of Soil and the Environment Hong Kong Baptist University & Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China)

A pot experiment was conducted to study the plant growth and fruit yields of cucumber （Cucumis sativus L.） on a greenhouse soil with or without inoculation of arbuscular mycorrhizal fungi （amfs） and Fusarium oxysporum f. sp, cucumerinum under unsterilized conditions. Two amf inocula were tested： only one amf strain Glomus caledonium 90036 and an amf consortium mainly consisting of Glornus spp. and Acaulospora spp. There were four treatments including no inoculation （control）, inoculation with F. oxysporum but without mycorrhizae （FO）, inoculation with F. oxysporum and G. caledonium （FO＋M1）, and inoculation with F. oxysporum and the amf consortium （FO＋M2）. Cucumber plants were harvested at weeks 3 and 9 after transplanting. Compared with the control, the FO treatment without amf inoculation had less biomass both at weeks 3 and 9 （P 〈 0.05） and had higher incidence of Fusarium wilt and produced no cucumber fruit at week 9. Both FO＋M1 and FO＋M2 treatments had higher mycorrhizal colonization than the treatments which received no amf inoculation at week 3 （P 〈 0.05）, but only the FO＋M2 treatment elevated plant biomass, decreased the incidence of Fusarium wilt, and improved cucumber yields to the same level as the control at week 9. The results indicated that the amf consortium could suppress Fusarium wilt of cucumber and, therefore, showed potential as a biological control agent in greenhouse agroecosystems.

关键词： amf consortia Fusarium oxysporum f. sp. cucumerinum soil-borne disease wilt plant death

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The Inoculation of Arbuscular Mycorrhizal Fungal consortia Enhances Suppression of Cucumber Fusarium Wilt in a Greenhouse Soil

The Inoculation of Arbuscular Mycorrhizal Fungal consortia E...

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第五次全国土壤生物和生物化学学术研讨会

作者： HU Junli,LIN Xiangui~ (State Key Laboratory of Soil and Sustainable Agriculture,Joint Open Laboratory of Soil and the Environment,Hongkong Baptist University & Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008 China)

Fusarium wilt,caused by the soilborn plant pathogens Fusarium oxysporum ***. cucumerinum(FO),is believed to be the major soilborn disease in commercial cucumber(Cucumis sativus L.) ***,arbuscular mycorrhizal(AM) associations provide a direct link between soil and roots,and AM fungi(amf) are renowned for their ability to improve plant mineral nutrients and enhance plant tolerance against biotic and abiotic *** a result,the use of amf as a potential biological control agent of soilborn plant pathogens has also been suggested. As amf occur as communities in soil and in roots,reconstructive communities of amf in soil promotes plant growth,and they are likely to collectively contribute to nutrient *** hypothesized that the inoculation of amf consortia might enhance plant suppression of soilborn disease more effectively than a single-amf strain.A glasshouse pot experiment was conducted to study the plant growth and fruit yield of cucumber inoculated with or without arbuscular mycorrhizal fungi(amf) in a greenhouse soil added with FO under unsterilized *** amf inocula,M1 containing only one AM fungal strain(Glomus caledonium 90036) and M2 mostly consisting of Glomus *** Acaulospora spp.,were *** were another FO-added treatment received no amf,and the control received neither amf nor *** plants were harvested at weeks 3 and 9 after *** with the control,the FO-infected plants without amf inoculation had less biomass both at weeks 3 and 9(Pamf inoculation at week 3(Pamf consortia M2 can restrain Fusarium wilt of

关键词： amf consortia soilborn disease Fusarium oxysporum f.sp.Cucumerinum Cucumis sativus

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