Abstract:
:The cultivation of the ectomycorrhizal fungus Tuber melanosporum has considerably spread in recent years throughout the world. During the first years of truffle cultivation, weed control is a key practice to improve the establishment of host trees and the proliferation of the fungus in the soil. Glyphosate is nowadays the most commonly used herbicide in Spanish truffle orchards. We explored the effect of glyphosate on the proliferation of T. melanosporum mycorrhizae, on extraradical mycelium and on the inoculum potential of T. melanosporum spores in greenhouse experiments using Quercus ilex seedlings as host plants. No detrimental effect on the secondary infection of T. melanosporum was found after three sequential glyphosate applications in young seedlings during one vegetative period. Instead, a change in the distribution of fine roots and T. melanosporum mycorrhizae along soil depth was observed. On the other hand, results indicate that high application rates of glyphosate hinder the infectivity of T. melanosporum spore inoculum, without apparent impact on the host performance. Our results suggest that glyphosate has the potential to jeopardise the role of the soil spore bank as inoculum source for the colonisation of new roots, also raising the question of whether glyphosate could hinder the presumed role of spores in sexual mating.
journal_name
Mycorrhizajournal_title
Mycorrhizaauthors
Gómez-Molina E,Sánchez S,Parladé J,Cirujeda A,Puig-Pey M,Marco P,Garcia-Barreda Sdoi
10.1007/s00572-020-00990-8subject
Has Abstractpub_date
2020-11-01 00:00:00pages
725-733issue
6eissn
0940-6360issn
1432-1890pii
10.1007/s00572-020-00990-8journal_volume
30pub_type
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