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Studies on the ectomycorrhizal community in a declining Quercus suber L. stand

Lancellotti, Enrico and Franceschini, Antonio (2013) Studies on the ectomycorrhizal community in a declining Quercus suber L. stand. Mycorrhiza, Vol. 23 (7), p. 533-542. ISSN 0940-6360. eISSN 1432-1890. Article.

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DOI: 10.1007/s00572-013-0493-z

Abstract

This survey was carried out in a Quercus suber L. stand with many trees affected by the disease "oak decline". Its aim was to obtain information about both the belowground ectomycorrhizal fungal community in a declining Q. suber stand as a whole, and the ectomycorrhizal fungal community of individual tree (EFT) detected in healthy and diseased plants. To this end, we first categorized the trees into four different decline classes (one for healthy plants and three for diseased plants) and then, by using morphological and molecular tools, we identified the ectomycorrhizas isolated from samples collected near the trees with different declining classes. The ectomycorrhizal community as a whole was seen to be composed of numerous ectomycorrhizal fungal species, only some of which appeared to be dominant (Cenococcum geophilum, Lactarius chrysorrheus, and some species of Tomentella genus), while most occurred sporadically. Results show that all root tips observed are mycorrhized and that decline class does not influence the number of ectomycorrhizal root tips found in the EFTs, thus oak decline does not impact the investment in ectomycorrhizal symbiosis. However, some statistical differences can be observed in the values of evenness and taxonomic distinctness in the EFT associated with trees with different states of health. Finally, both the analysis of similarity test and the ordination technique highlight a compositional difference between the EFT associated with trees in different health conditions, but also suggest that other factors may play a role in causing these differences.

Item Type:Article
ID Code:9206
Status:Published
Refereed:Yes
Uncontrolled Keywords:Community ecology, cost of symbiosis, DNA sequencing, ectomycorrhizal fungi, Mediterranean ecosystems
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/12 Patologia vegetale
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:Springer Berlin Heidelberg
ISSN:0940-6360
eISSN:1432-1890
Deposited On:27 Sep 2013 09:46

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