Search results for "BOTRYTIS CINEREA"
showing 10 items of 84 documents
Le génome de Botrytis décrypté
2012
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Caractères moisi-terreux des vins : origine et prévention
2005
Note de synthèse du groupe national de travail ONIVINS - juillet 2005; National audience
Transcriptomes of compatible and non-compatible gray mold/grapevine interactions compared in search of resistance factors
2012
National audience; Gray mold (Botrytis cinerea) causes significant annual yield and quality losses to viticulture. Comparison of transcriptomes of compatible and non-compatible interaction with Vitis vinifera cv Marselan – on harvesting stage berries or véraison stage berries, respectively – suggest the jasmonic acid pathway is activated in the former, while the salicylic acid pathway is more pronounced in the latter. In addition, in the non-compatible case, reactive oxygen species accumulation seems to be both early and strong, and some genes involved in cell-wall reinforcement are up-regulated.
Imagerie pour les maladies de la vigne
2013
La viticulture est confrontée à des problèmes majeurs dont la lutte contre les maladies cryptogamiques telles que l’oïdium ou la pourriture grise. Elle utilise alors majoritairement des produits phytosanitaires de synthèse susceptibles de poser des problèmes environnementaux et sanitaires, et de favoriser la sélection de souches de microorganismes pathogènes résistantes. Dans le cadre du plan Ecophyto 2018, la recherche de méthodes visant à diminuer, voire à remplacer, les fongicides de synthèse au vignoble, a pris toute sa place. Deux approches peuvent alors être conduites pour répondre à cet objectif : 1) la réduction du nombre de traitements et des doses appliquées et 2) le développement…
The plant resistance inducer β-aminobutyric acid (BABA) induces an iron deficiency response in A. thaliana
2012
β-aminobutyric acid (BABA) is a well-known plant resistance inducer. However, the molecular mechanisms underlying its effects are poorly understood. In the present study, we investigated whether BABA could act through the modification of iron homeostasis in Arabidopsis thaliana. Supporting this assumption, we obtained first evidences that BABA chelates iron with high affinity. We showed that pre-treatment of plants with BABA induced a drastic but transient iron deficiency response. Quantification of iron indicated that this response is related to the perturbation of iron distribution/availability rather than a reduction of iron assimilation. Finally, we provided evidence that the iron defic…
Dual mode of action of grape cane extracts against Botrytis cinerea
2019
International audience; Crude extracts of Vitis vinifera canes represent a natural source of stilbene compounds with well characterized antifungals properties. In our trials, exogenous application of a stilbene extract (SE) obtained from grape canes on grapevine leaves reduces the necrotic lesions caused by Botrytis cinerea. The SE showed to possess a direct antifungal activity by inhibiting the mycelium growth. The activation of some grapevine defense mechanism was also investigated. H2O2 production and activation of mitogen-activated protein kinase (MAPK) phosphorylation cascades as well as accumulation of stilbenoid phytoalexins were explored on grapevine cell suspension. Moreover, the t…
ITS region of Pythium canariense sp. nov., its morphology and its interaction with Botrytis cinerea.
2002
A new species Pythium canariense (CI-07), isolated from soil samples taken in the San Nicolas region of the Canary islands (Gran Canaria, Spain), is being described here. This species is characterised by its spherical to pyriform, intercalary to catenulate sporangia, smooth-walled terminal oogonia supplied with monoclinous and diclinous antheridia which at times are branched and wrap around the female gametangia. The fungus has an antagonistic effect on Botrytis cinerea, the grey mould fungus. Morphological features are being given here together with the sequence of the complete internal transcribed spacer region of the nuclear ribosomal DNA of the fungus, its comparison with related specie…
PHB-based films as matrices for pesticides
2002
Abstract The effects of pesticides incorporated into PHB-based polymeric matrices on the biodegradability of films and antifungal efficiency of immobilised pesticides to Botrytis cinerea was studied. The mass loss of tested PHB-based films for 2 weeks was 40–50% and after 4 weeks 92–96% of the initial mass. The fungicides Ronilan and Sumilex immobilised into the polymeric matrices did not depress the film degradation rate. PHB-based films caused changes in the soil microorganism association. Fungicides immobilised in PHB-based matrices decreased the count of the phytopathogenic fungus B. cinerea.
Supression of Botrytis cinerea causing grey mould disease of grape vine (Vitis vinifera) and its pectinolytic activities by a soil bacterium
1997
Abstract Botrytis cinerea was found to be pathogenic to grapevine, producing characteristic grey mould symptoms within 7 days of inoculation into vitroplants. An endospore forming bacterial strain (GI 070), Bacillus circulans, was found to be antagonist against this disease causing fungus. Under laboratory conditions the bacterial culture or its filtrate brings about complete suppression of the fungus in Petri-dishes and the grey mould symptoms on grapevine vitroplants. Pectinolytic activities (Polygalacaturonase, Pectin lyases) of Botrytis cinerea were also influenced by these bacteria. Details of the fungal parasite, its biological control and its pectinolytic activities are discussed in …
First Report of Botrytis Blight on Medinilla magnifica and Various Species of Mandevilla and Allamanda in Italy.
2019
Medinilla magnifica Lindl., Mandevilla splendens (Hook.) Woodson, the hybrid Mandevilla × amoena ‘Alice du Pont’ (pink allamanda), and various species of Allamanda, such as A. cathartica L. and A. blanchetii A. DC. (purple allamanda), are grown in Sicily as ornamentals. After a frost in early December 2001, a sudden wilt of container-grown cuttings of these tropical species was observed in a plastic-covered production greenhouse, with ≈30% of M. magnifica plants and 70% of Mandevilla and Allamanda plants affected. Medinilla plants (≈35 cm high) had been rooted in trays and transplanted individually in 30-cm-diameter pots. Allamanda (recently rooted cuttings) and Mandevilla (well-establishe…