Infection of valuable broadleaf hardwood trees by Glomus mosseae: growth and mineral nutrition |
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| Authors: | M Bragaloni R Pirazzi E Rea G Puppi |
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| Institution: | (1) Istituto Sperimentale per la Nutrizione delle Piante, Sezione Fisiologia dello Sviluppo Vegetale, Via della Navicella, 2-4-00184 Roma, Italy;(2) Centro di Sperimentazione Agricola e Forestale, Via di Casalotti, 300-00166 Roma, Italy;(3) Dipartimento di Biologia Vegetale, Università di Roma  La Sapienza , Piazzale A. Moro, 5-00185 Roma, Italy;(4) Seminis Vegetable Seeds - Peto Italiana Srl, Via Canneto di Rodi, snc 04010 Borgo Sabotino - Latina, Italy |
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| Abstract: | In the past century, the excessive exploitation of the environment by human beings has resulted in the depletion of valuable broadleaf hardwood trees in Italian forests, creating a need for re-forestation. The aim of this research was to verify whether a vescicular-arbuscular mycorrhizal (VAM) fungus is able to colonise the root of valuable hardwood trees and to evaluate the impact of the VAM fungus on growth and macroelement nutrition of its plant hosts.Four species of valuable broadleaf hardwood trees, Prunus avium L., Fraxinus excelsior L., Acer pseudoplatanus L., and Juglans nigra L., were inoculated with Glomus mosseae, a VAM fungus, and cultivated in a greenhouse. Infection after inoculation and root colonization by the fungus, tree growth, and macro-element nutrition were evaluated two-years after inoculation. G. mosseae formed mycorrhizae on all plants. However, different morphological aspects - predominantly the formation of Arum type arbuscles in P. avium and F. excelsior - were observed. A general improvement of macro-element nutrition from species to species characterised an enhanced growth of mycorrhizal plants. Therefore, it is plausible that the association of VAMs with these broadleaf trees, could overcome the difficulties encountered in the transplanting and the slow growth typical of these tree species.Although numerous articles have reported the beneficial effects of ectomycorrhizal fungi on trees, there is a sparse literature on the association of VAM with tree species. Therefore, this study contributes to the understanding of the role of the symbiosis between valuable broadleaf trees and VAM fungi in macroelement nutrition. |
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| Keywords: | Root colonization Vescicular-arbuscular mycorrhizae Glomus mosseae Valuable broadleaf hardwood trees Plant growth Macro-element nutrition |
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