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What if esca disease of grapevine were not a fungal disease?
This study presents the first in-depth comparison between the mycota of healthy and diseased plants taken from the same vineyard to determine which fungi become invasive when foliar symptoms of esca appear and question the assumed pathogenicity of fungi in other diseases of plants or animals. Expand
Botrytis cinerea Infection in Grape Flowers: Defense Reaction, Latency, and Disease Expression.
ABSTRACT Inflorescences of field-grown grapevines (Vitis vinifera L. cv. Gamay) were inoculated with a Botrytis cinerea conidia suspension or dried conidia at different stages during bloom in moistExpand
Ecology, metabolite production, and substrate utilization in endophytic fungi.
The production of growth promoting factors and of metabolites useful in the pharmaceutical and agricultural industry is widespread among endophytic fungi, and their usefulness in agricultural and pharmaceutical research is briefly discussed. Expand
Glycosylation and oxidative dimerization of resveratrol are respectively associated to sensitivity and resistance of grapevine cultivars to downy mildew
Level of resistance to Plasmopara viticola of different grapevine cultivars were observed in vineyards and confirmed by the symptoms developed after inoculations, and the importance of oxidative dimerization of resveratrol in comparison to the extent of its glycosylation in defense reaction of grapevines against P. Viticola is discussed. Expand
Characterization of molecular markers for specific and sensitive detection of Botrytis cinerea Pers.: Fr. in strawberry (Fragariaxananassa Duch.) using PCR.
This PCR-based detection procedure is a powerful tool for diagnosis of B. cinerea in symptomless strawberry plants, and should allow infection and latency sites to be localized in order to improve knowledge of the epidemiology of the pathogen under field conditions. Expand
Fungal communities living in the wood of different cultivars of young Vitis vinifera plants.
The results show that almost 25% of OTUs occurred in different plant parts in most cultivars, which suggests an easy spread outwards from the infected material (graft or rootstock), which might be explained by the fungal propagules being transported through the xylem vessels. Expand
Delta-viniferin, a resveratrol dehydrodimer: one of the major stilbenes synthesized by stressed grapevine leaves.
This dimer was identified by NMR, high-performance liquid chromatography-diode array detection (HPLC-DAD), and HPLC-mass spectrometry in grapevine leaves infected by Plasmopara viticola (downy mildew) or UV-C irradiated and constitutes one of the most important phytoalexins derived from resveratrol. Expand
Diurnal cycles of embolism formation and repair in petioles of grapevine (Vitis vinifera cv. Chasselas)
The Chasselas cultivar appears to develop hydraulic segmentation, in which petiole cavitation plays an important role as a ‘hydraulic fuse’, thereby limiting leaf transpiration and the propagation of embolism and preserving the integrity of other organs during water stress. Expand
Histological study of the responses of two Vitis vinifera cultivars (resistant and susceptible) to Plasmopara viticola infections
The role of stomatal callose deposits in the defense reactions of the Solaris grapevine cultivar against P. viticola is discussed and stomata in the vicinity of the infection sites contained callose deposit in and around theStomatal openings, but no necrotic zones were observed. Expand
Effects of resveratrol, viniferins and pterostilbene on Plasmopara viticola zoospore mobility and disease development
The analysis of stilbenes in leaf cells of resistant (Solaris) and susceptible (Chasselas) grape cultivars artificially inoculated with P. viticola has shown that very high amounts ofStilbenic phytoalexins accumulate at the site of infection of the resistant cultivar compared to the susceptible one. Expand