Effect of ectomycorrhizal fungi on chestnut ink disease |
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| Authors: | M B Branzanti E Rocca A Pisi |
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| Institution: | (1) Dipartimento di Biotecnologie Agrarie ed Ambientali, Università degli Studi di Ancona, Via Brecce Bianche,\nI-60131 Ancona, Italy\ne-mail: branzanti@popcsi.unian.it, Fax: +39-71-2204858, IT;(2) Dipartimento di Protezione e Valorizzazione AgroAlimentare, Università degli Studi di Bologna, Via Filippo Re 8,\nI-40126 Bologna, Italy, IT;(3) Istituto di Patologia Vegetale,\nU.C.I. S.T.A.A. Università degli Studi di Bologna,\nVia Filippo Re 8,\nI-40126 Bologna, Italy, IT |
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| Abstract: | Seedlings of Castanea sativa were inoculated at transplanting time with four ectomycorrhizal (ECM) fungi, Laccaria laccata, Hebeloma crustuliniforme, H. sinapizans and Paxillus involutus. At the end of the first vegetative season, 7 months after sowing, half of the mycorrhizal and nonmycorrhizal seedlings were
challenged with a zoospore suspension of Phytophthora
cambivora and the other half with P. cinnamomi. Five months later, mycorrhizal plants infected with P. cambivora or P. cinnamomi showed no sign of pathogen infection. The ECM fungi increased plant biomass also in the presence of the pathogen. Mycorrhizal
seedlings inoculated with the pathogens showed greater shoot and root development than nonmycorrhizal chestnut plants. All
the fungi tested reduced the negative effect of the ink disease pathogens on the plant host in vivo. The mechanisms by which
the ECM fungi protect chestnut seedlings are discussed.
Accepted: 20 May 1999 |
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| Keywords: | Ectomycorrhiza Castanea sativa Phytophthoracambivora Phytophthora cinnamomi |
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