Search results for "MYCOLOGY"

Diversity and distribution of Phytophthora species in protected natural areas in Sicily

2019

: The aim of this study was to investigate the occurrence, diversity, and distribution of Phytophthora species in Protected Natural Areas (PNAs), including forest stands, rivers, and riparian ecosystems, in Sicily (Italy), and assessing correlations with natural vegetation and host plants. Fifteen forest stands and 14 rivers in 10 Sicilian PNAs were studied. Phytophthora isolations from soil and stream water were performed using leaf baitings. Isolates were identified using both morphological characters and sequence analysis of the internal transcribed spacer (ITS) region. A rich community of 20 Phytophthora species from eight phylogenetic clades, including three new Phytophthora taxa, was …

Factors influencing infection patterns of trophically transmitted parasites among a fish community: host diet, host-parasite compatibility or both?

2011

20 pages; International audience; Parasite infection patterns were compared with the occurrence of their intermediate hosts in the diet of nine sympatric fish species in a New Zealand lake. Stomach contents and infection levels of three gastrointestinal helminth species were examined from the entire fish community. The results highlighted some links between fish host diet and the flow of trophically transmitted helminths. Stomach contents indicated that all but one fish species were exposed to these helminths through their diet. Host feeding behaviour best explained infection patterns of the trematode Coitocaecum parvum among the fish community. Infection levels of the nematode Hedruris spi…

Première contribution à l'étude des mycorhizes des îles Kerguelen

1999

Abstract Until recently mycorrhizae had not been studied in the Antarctic region. Some studies have demonstrated that mycorrhizae occur in some southern circumpolar islands. This paper gives the first results on the mycorrhizae in the Kerguelen islands (Sub-antarctic). Twenty-one plant root systems, fixed in the field, were examined microscopically in the laboratory to determine their mycorrhizal status. No ectomycorrhiza, arbutoid or ericoid were noted. Six plant species showed vesicular arbuscular mycorrhizae: Ranunculus biternatus, Galium antarcticum, Festuca erecta, Poa kerguelensis, Agrostis magellanica and Poa annua. However, the mycorrhizal status varied according to the site studied.

Glomus ibericum, Septoglomus mediterraneum, and Funneliformis pilosus, three new species of arbuscular mycorrhizal fungi

2020

Three new arbuscular mycorrhizal fungal species—Glomus ibericum, Septoglomus mediterraneum, and Funneliformis pilosus—are described and illustrated. In the field, the three species were associated with roots of Ammophila arenaria (Poaceae), Elymus farctus (Poaceae), Otanthus maritimus (Asteraceae), and Echinophora spinosa (Apiaceae) colonizing maritime dunes located along the Mediterranean coast in eastern Spain. The novelty of these species is supported by morphological, molecular, and phylogenetic analyses. Single-species cultures of S. mediterraneum and F. pilosus were obtained using Trifolium repens as a host plant, both forming arbuscular mycorrhizae, whereas single-species cultures fr…

Lichen communities on Populus   tremula are affected by the density of Picea   abies

2021

Questions Aspen (Populus tremula) is declining in the old‐growth forests of boreal Fennoscandia. This threatens the numerous taxa that are dependent on old aspens, including many epiphytic lichens. Potential methods to aid epiphytic lichens on aspen are centered around treatments which affect the density of Norway spruce (Picea abies). In this study, we investigated how epiphytic lichen communities on aspen are affected by the variation of spruce density in the immediate vicinity of the focal aspen. Location Southern boreal forests in Finland. Methods We recorded the occurrence of lichens from 120 aspens in 12 semi‐natural forest sites. We used spruce basal area as the measure for spruce de…

Blastocystis sp., an emerging parasite with controversial pathogenicity. Should all human cases be treated?

2018

Pisolithus albus, a new record for Italy

2018

The results of macroscopic and microscopic observations have highlighted the presence of P. albus also in Italy. The distribution of this species in the Italian territory seems much wider than previously realised and most of the herbarium samples previously identified as P. arhizus should probably be re-analyzed using morphological, microscopic and molecular criteria.

Epidemiological analysis of human fascioliasis in northeastern Punjab, Pakistan.

2016

A coprological study was performed to assess human fascioliasis in 7200 subjects inhabiting rural communities of localities close to the capital city of Lahore in the northeastern part of the very highly populated Punjab province, Pakistan, a country where human infection had never been reported before 2005. The analysis of 1200 subjects including 50 subjects/month throughout a two-year study in each of six localities surveyed provided an overall prevalence of 1.18%, with a range between 0.67% and 1.75% according to localities. Infection rates did not differ according to gender, excepting a higher rate in females (1.13% vs 0.77%) in one locality. Prevalences according to age groups proved t…

New contribution to the knowledge of two species of culicids inhabiting a mountainous rural area of Spain: Aedes (Rusticoidus) refiki (Medschid, 1928…

2017

espanolEntre final de abril y principio de mayo de 2017, en un area de montana con altitudes superiores a 1.500 msnm, se capturaron dos especies de mosquitos (Diptera, Culicidae) poco comunes: Aedes (Rusticoidus) refiki y Aedes (Ochlerotatus) pullatus. Se recolectaron 626 ejemplares, con densidades larvarias mayoritarias de Ae. refiki (87%). Se describio una nueva asociacion larvaria entre ambas especies, hasta la fecha desconocida. Los culicidos se localizaron en un entorno habitualmente nevado en invierno, del Parque Natural del Alto Tajo (Guadalajara, Comunidad de CastillaLa Mancha) y en los Montes Universales (Teruel, Comunidad Auto- noma de Aragon). En consecuencia, se presentan como p…

Numerous Fasciola plasminogen-binding proteins may underlie blood-brain barrier leakage and explain neurological disorder complexity and heterogeneit…

2019

15 páginas, 5 figuras y 1 tabla