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1562. Brown rotting fungus closely related to Pseudomerulius curtisii (Boletales) recorded for the first time in South AmericaDB Baldoni, G Coelho, RJS Jacques, RMB Silveira, Tine Grebenc, Zaida Ines Antoniolli, 2012, original scientific article Abstract: In the region of Santa Maria, Southern Brazil, we have analyzed morphologically and molecularly some interesting brown-rotting mushroom specimens closely related to Pseudomerulius curtisii. Except for minor differences in morphology and ITS sequence similarity, collections have corresponded to P. curtisii by basidiospore size and shape, the kind of hyphal system, the macromorphology, the slightly unpleasant pungent spicy smell turning stronger upon drying and, particularly, by the highly supported and closely related clade after phylogenetic analysis. Perhaps due the rarity in nature, morphological data are not abundant in literature and appears to be somewhat incomplete to discordant for the species, so we provide a more detailed description and illustrations from collected specimens.
Published in DiRROS: 12.07.2017; Views: 2929; Downloads: 1231
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1567. Ectomycorrhizal fungi from southern Brazil - a literature-based review, their origin and potential hostsMarcelo Aloisio Sulzbacher, Tine Grebenc, RJS Jacques, Zaida Ines Antoniolli, 2013, original scientific article Abstract: A first list of ectomycorrhizal and putative ectomycorrhizal fungi from southern Brazil (the states of
Rio Grande do Sul, Santa Catarina and Paraná), their potential hosts and origin is presented. The list
is based on literature and authors observations. Ectomycorrhizal status and putative origin of listed
species was assessed based on worldwide published data and, for some genera, deduced from
taxonomic position of otherwise locally distributed species. A total of 144 species (including 18
doubtfull species) in 49 genera were recorded for this region, all accompanied with a brief
distribution, habitat and substrate data. At least 30 collections were published only to the genus
level and require further taxonomic review.
Published in DiRROS: 12.07.2017; Views: 2832; Downloads: 1269
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1569. The production and turnover of extramatrical mycelium of ectomycorrhizal fungi in forest soils: role in carbon cyclingA. Ekblad, Hojka Kraigher, 2013, review article Abstract: There is growing evidence of the importance of extramatrical mycelium (EMM) of mycorrhizal fungi in carbon (C) cycling in ecosystems. However, our understanding has until recently been mainly based on laboratory experiments, and knowledge of such basic parameters as variations in mycelial production, standing biomass and turnover as well as the regulatory mechanisms behind such variations in forest soils is limited. Presently, the production of EMM by ectomycorrhizal (EM) fungi has been estimated at ~140 different forest sites to be up to several hundreds of kg per ha per year, but the published data are biased towards Picea abies in Scandinavia. Little is known about the standing biomass and turnover of EMM in other systems, and its
influence on the C stored or lost from soils. Here,
focussing on ectomycorrhizas, we discuss the factors
that regulate the production and turnover of EMM and
its role in soil C dynamics, identifying important gaps
in this knowledge. C availability seems to be the key
factor determining EMM production and possibly its
standing biomass in forests but direct effects of mineral nutrient availability on the EMM can be important. There is great uncertainty about the rate of turnover of EMM. There is increasing evidence that residues of EM fungi play a major role in the formation of stable N and C in SOM, which highlights the need to include mycorrhizal effects in models of global soil C stores.
Published in DiRROS: 12.07.2017; Views: 2304; Downloads: 1178
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