scholarly journals Pourriture vulgaire et pourriture noble en Bordelais

OENO One ◽  
1978 ◽  
Vol 12 (1) ◽  
pp. 21
Author(s):  
Bernard Pucheu-Planté ◽  
Gérard Seguin ◽  
Michel Mercier
Keyword(s):  
Botrytis Cinerea ◽  
Grape Berry ◽  
Simultaneous Development

<p style="text-align: justify;">Contrairement à la « pourriture vulgaire » qui correspond au développement simultané de <em>Botrytis cinerea</em> et de divers champignons (<em>Penicillium</em>, <em>Aspergillus</em>, etc...) sur la baie de raisin éclatée, « la pourriture noble » correspond à un développement presque exclusif de <em>Botrytis</em> sur des baies mûres et apparemment intactes.</p><p style="text-align: justify;">Dans ce travail, on montre que la pénétration des tubes germinatifs ou du mycélium de <em>Botrytis</em> ne peut se faire qu'à travers des microlésions de la pellicule, autres que les cassures péristomatiques, les hyphes se développent entre les cellules de la pellicule mais ressortent à l'extérieur, soit sous forme de mycélium, soit sous forme de conidiophores et assurent ainsi la propagation de la pourriture.</p><p style="text-align: justify;">+++</p><p style="text-align: justify;">Contrary to « common rot » which corresponds to the simultaneous development of <em>Botrytis cinerea</em> and various fungi (<em>Penicillium</em>, <em>Aspergillus</em>, etc...) on the burst grape berry, « noble rot » corresponds to an almost exclusive development of <em>Botrytis</em> on ripe and apparently intact berries.</p><p style="text-align: justify;">In this work, it is shown that the penetration of the germinative tubes or mycelium of <em>Botrytis</em> can only take place through the micro-lesions of the pellicle, the hyphae develop between the cells of other than the peristomatic breaks the pellicle but come out on the outside, either in the form of mycelium, or in the form of conidiophores and thus propagate the rot.</p>

Grape berry skin features related to ontogenic resistance to Botrytis cinerea

2009 ◽  
Vol 125 (4) ◽  
pp. 551-563 ◽  
Author(s):  
Christelle Deytieux-Belleau ◽  
Laurence Geny ◽  
Jean Roudet ◽  
Valérie Mayet ◽  
Bernard Donèche ◽  
...  
Keyword(s):  
Botrytis Cinerea ◽  
Grape Berry ◽  
Berry Skin ◽  
Ontogenic Resistance

scholarly journals Germination and Establishment of Infection on Grape Berries by Single Airborne Conidia of Botrytis cinerea

Plant Disease ◽  
2001 ◽  
Vol 85 (6) ◽  
pp. 668-677 ◽  
Author(s):  
S. Coertze ◽  
G. Holz ◽  
A. Sadie
Keyword(s):  
Botrytis Cinerea ◽  
Incubation Period ◽  
Skin Penetration ◽  
Grape Berry ◽  
High Rate ◽  
Disease Symptoms ◽  
Surface Colonization ◽  
Grape Berries ◽  
Table Grapes ◽  
Infection Mode

Table grapes (cv. Dauphine) at different phenological stages were dusted in a settling tower with dry conidia of Botrytis cinerea. The berries were incubated for periods of 3 to 96 h at high relative humidity (RH; ±93% RH, moist berries), or were covered with a film of water (wet berries). Germination of the solitary conidia, appressorium formation, stilbene and suberin induction by germlings, and germling viability were examined by fluorescence microscopy after each incubation period. Isolation and freezing studies were conducted to determine surface colonization (berries left unsterile) and penetration (surface-disinfested berries). Symptoms were determined on berries incubated at a specific wetness regime, kept dry for 10 days, and then incubated for 4 days at high RH. Microscopic observations indicated that germination was delayed on immature berries, but proceeded at a high rate on mature berries. Growth was invariably restricted on moist berries. Attempted penetration was always direct. Stilbene and suberin were generally induced early and were intense on berries at the pea-size and bunch closure stages. Dieback of conidia and germlings occurred at a significantly higher rate on wet than moist berries, and was more pronounced on immature than on mature berries. The segment isolation and freezing studies showed that infections in grape berry cheeks established by this infection mode were few. Extended incubation periods did not lead to substantially higher rates of surface colonization and skin penetration. Disease symptoms did not develop during the 14-day period on the berries transferred to dry perspex chambers, irrespective of phenological stage, incubation period, or wetness regime. According to these findings, this mode of infection should not contribute to a gradual build-up of secondary inoculum in the vineyard, and to B. cinerea epiphytotics.

scholarly journals Histochemical and Microscopic Studies Predict that Grapevine Genotype “Ju mei gui” is Highly Resistant against Botrytis cinerea

Pathogens ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 253
Author(s):  
Mati Ur Rahman ◽  
Qingqing Ma ◽  
Bilal Ahmad ◽  
Muhammad Hanif ◽  
Youlin Zhang
Keyword(s):  
Reactive Oxygen Species ◽  
Disease Resistance ◽  
Jasmonic Acid ◽  
Botrytis Cinerea ◽  
Reactive Oxygen ◽  
Fungal Growth ◽  
Grape Berry ◽  
Vitis Vinifera L ◽  
Oxygen Species ◽  
Limited Information

The necrotrophic fungus Botrytis cinerea causes devastating pre- and post-harvest yield losses in grapevine (Vitis vinifera L.). Although B. cinerea has been well-studied in different plant species, there is limited information related to the resistance and susceptibility mechanisms of Vitis genotypes against B. cinerea infection. In the present study, leaves and berries of twenty four grape genotypes were evaluated against B. cinerea infection. According to the results, one genotype (Ju mei gui) was highly resistant (HR), one genotype (Kyoho) was resistant (R), eight genotypes were susceptible (S), and fourteen genotypes were highly susceptible (HS) against infection of B. cinerea in leaves. Whereas in the case of B. cinerea infection in grape berry, three genotypes were found to be highly resistant, three resistant, eleven genotypes susceptible, and seven were highly susceptible. To further explore the mechanism of disease resistance in grapevine, we evaluated “Ju mei gui” and “Summer black” in terms of B. cinerea progression, reactive oxygen species reactions, jasmonic acid contents, and the activities of antioxidant enzymes in leaf and fruit. We surmise that the resistance of “Ju mei gui” is due to seized fungal growth, minor reactive oxygen species (ROS) production, elevated antioxidant enzyme activity, and more jasmonic acid (JA) contents. This study provides insights into the resistance and susceptibility mechanism of Vitis genotypes against B. cinerea. This will help for the selection of appropriate germplasm to explore the molecular basis of disease resistance mechanisms in grapevine.

Bunch rot of Rhine Riesling grapes in the lower south-west of Western Australia

1980 ◽  
Vol 20 (103) ◽  
pp. 247 ◽  
Author(s):  
MJ Barbetti
Keyword(s):  
Botrytis Cinerea ◽  
Western Australia ◽  
Aureobasidium Pullulans ◽  
Grape Berry ◽  
Complete Elimination ◽  
South West ◽  
Wide Range ◽  
Bunch Rot ◽  
Lower South

A bunch rot disorder of Rhine Riesling grapes was investigated during the 1976-77 and 1977-78 seasons in south-west of Western Australia. Fungi isolated from immature berries at or just after flowering were not identical to those isolated from rotting berries at harvest. A wide range of fungi, including Aureobasidium pullulans (de Bary) Arnaud, Botrytis cinerea Pers. ex Fr., Rhizopus, Aspergillus, Penicillium and Alternaria spp., was isolated from rotted berries at harvest. More than 98% of rotting berries showed berry splitting or cracking, or both, at the pedicel end of the grape. Berry thinning of bunches by hand resulted in the almost complete elimination of berry splitting and cracking and a corresponding decline in bunch rot levels. The yield of unrotted bunches from the thinned vines was more than twice that for the unthinned ones; however, thinning reduced overall total vine yields by 63% compared with yields from unthinned vines.

scholarly journals Impedance of the Grape Berry Cuticle as a Novel Phenotypic Trait to Estimate Resistance to Botrytis Cinerea

Sensors ◽  
2015 ◽  
Vol 15 (6) ◽  
pp. 12498-12512 ◽  
Author(s):  
Katja Herzog ◽  
Rolf Wind ◽  
Reinhard Töpfer
Keyword(s):  
Botrytis Cinerea ◽  
Grape Berry ◽  
Phenotypic Trait
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