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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
Endophytic presence of Discula quercina on Declining Quercus cerris
The results indicate that D. quercina is able to live in symbiosis with its host, and the colonization of the aerial parts of Q. cerris is possible through infection with wind-borne inoculum, leaf infection can also occur through overwintering mycelium migrating to the leaves mainly from the buds, but also to a lesser extent from the twigs. Expand
Dendroclimatic analysis of "Quercus robur" infected with "Fusarium eumartii"
It is concluded that the decline of the Q. robur population occurring at Fagare may be due to periods of drought acting as an inciting factor to reduce growth, followed one year later by activity of the pathogen F. eumartii and its metabolites, as a contributing factor. Expand
Infection of cotton byfusarium oxysporum f.sp.vasinfectum as affected by water stress
There was a consistent relation between low water potential in the xylem and severity of infection, particularly when the dry period occurred after inoculation, and this should be taken into account when the cotton grower is faced with water shortages. 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
Water stress and the development of cankers by Diplodia mutila on Quercus robur
It is concluded that Q. robur, a highly hygrophilous oak, suffers from water stress to such an extent that its structural and chemical defences are overcome and the seedlings are seriously damaged. Expand
Growth of axenic cultures of Cronartium flaccidum on callus tissue from Pinus nigra var. laricio and Pinus sylvestris.
The callus-fungal method was employed to test the response to C. flaccidum of the highly susceptible P. laricio and the resistant P. sylvestris, and results were consistent with the known resistance of the two species on whole plants. Expand