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Occurrence of Phytophthora species in oak stands in Italy and their association with declining oak trees
Summary Soil-borne species of Phytophthora were isolated from 19 of 30 examined oak forest areas in Italy. The frequency of isolated Phytophthora spp. (35.2%) was significantly correlated with soilExpand
Differences in composition of endophytic mycobiota in twigs and leaves of healthy and declining Quercus species in Italy
Summary The composition of the endophytic fungal assemblages in Quercus cerris, Q. pubescens and Q. robur, three oak species most susceptible to decline, was investigated in Fagare ` (Padova),Expand
Fungal endophytes in Mediterranean oak forests: a lesson from Discula quercina.
It is postulated here that climatic factors can change the endophytic nature of D. quercina, turning it into a weak pathogen or an opportunistic invader of senescing and indeed healthy trees, in an unstable equilibrium between transient mutualism/neutralism and latent pathogenesis. Expand
Histological studies on the mycoparasitism of Cladosporium tenuissimum on urediniospores of Uromyces appendiculatus.
Interactions between the mycoparasite Cladosporium tenuissimum and the bean rust Uromyces appendiculatus were studied through light and electron microscopy in vitro at the host-parasite interface, providing additional observations on a genus besides Melampsora and Cronartium. Expand
Secondary mould metabolites of Cladosporium tenuissimum, a hyperparasite of rust fungi.
Cladosporols 1-5 were active in inhibiting the urediniospore germination of the bean rust agent Uromyces appendiculatus. Expand
Use of RFLP and SSCP analysis to differentiate the pine rusts Cronartium flaccidum and Peridermium pini
Results obtained in this trial indicate that PCR-RFLP and PCR-SSCP can be used as simple, speedy taxonomic tools for elucidating relationships among related organisms. Expand
Endophytic fungi in Quercus cerris : isolation frequency in relation to phenological phase, tree health and the organ affected
Individual species were isolated more often from declining trees than from healthy trees, and more fungi were isolated in June (full vegetation) than in April or October, which is probably a serious contributing and inciting factor in the oak decline syndrome. Expand
Species- and organ-specificity in endophytes colonizing healthy and declining Mediterranean oaks
Understanding is advanced of the role of some pathogenic fungal endophytes in Mediterranean oak forests and how interaction between plant species and the environment and continued competitive interaction between endophyte species may have led to niche diversification. Expand
The oak decline: a new problem in Italy.
The Authors observed, in Italy, isolated and grouped trees of the genus Quercus that declined over one or more vegetative seasons; the spread was very fast; in fact the trees declined in the course of 2–3 Vegetative seasons. Expand
Disease incidence and vessel anatomy in cotton plants infected with Fusarium oxysporum f. sp. vasinfectum under salinity stress
The relation between disease incidence, diameter and number of xylem vessels in cotton plants (Gossypium hirsutum L.) grown under salinity stress and in the presence of FOV was discussed. Expand