Université de Fribourg

Bacillus subtilis PTA-271 counteracts Botryosphaeria dieback in grapevine, triggering immune responses and detoxification of fungal phytotoxins

Trotel-Aziz, Patricia ; Abou-Mansour, Eliane ; Courteaux, Barbara ; Rabenoelina, Fanja ; Clément, Christophe ; Fontaine, Florence ; Aziz, Aziz

In: Frontiers in Plant Science, 2019, vol. 10, p. -

Plant pathogens have evolved various strategies to enter hosts and cause diseases. Particularly Neofusicoccum parvum, a member of Botryosphaeria dieback consortium, can secrete the phytotoxins (-)-terremutin and (R)-mellein during grapevine colonization. The contribution of phytotoxins to Botryosphaeria dieback symptoms still remains unknown. Moreover, there are currently no efficient control...

Université de Fribourg

Reproducing Botryosphaeria dieback foliar symptoms in a simple model system

Reis, Pedro ; Magnin-Robert, Maryline ; Nascimento, Teresa ; Spagnolo, Alessandro ; Abou-Mansour, Eliane ; Fioretti, Cristina ; Clément, Christophe ; Rego, Cecilia ; Fontaine, Florence

In: Plant Disease

Botryosphaeria dieback is a grapevine trunk disease with a worldwide distribution and associated with Diplodia seriata and Neofusicoccum parvum among several other Botryosphaeriaceae species. The aforementioned xylem-inhabiting fungi cause wood lesions, leaf and berry symptoms and eventually lead to the death of the plant. The aim of this work was to develop a simple model system to reproduce the...

Université de Fribourg

Changes in plant metabolism and accumulation of fungal metabolites in response to Esca proper and apoplexy expression in the whole grapevine

Magnin-Robert, Maryline ; Spagnolo, Alessandro ; Boulanger, Anna ; Joyeux, Cécile ; Clément, Christophe ; Abou-Mansour, Eliane ; Fontaine, Florence

In: Phytopathology

Trunk diseases have become among the most important grapevine diseases worldwide. They are caused by fungal pathogens that attack the permanent woody structure of the vines and cause various symptoms in woody and annual organs. This study examined modifications of plant responses in green stem, cordon and trunk of grapevines expressing Esca proper (E) or apoplexy (A) event, which are the most...

Université de Fribourg

Phytotoxic metabolites from Neofusicoccum parvum, a pathogen of Botryosphaeria dieback of grapevine

Abou-Mansour, Eliane ; Débieux, Jean-Luc ; Ramírez-Suero, Montserrat ; Bénard-Gellon, Mélanie ; Magnin-Robert, Maryline ; Spagnolo, Alessandro ; Chong, Julie ; Farine, Sibylle ; Bertsch, Christohpe ; L’Haridon, Floriane ; Serrano, Mario ; Fontaine, Florence ; Rego, Cecilia ; Larignon, Philippe

In: Phytochemistry, 2015, vol. 115, p. 207–215

Liquid chromatography-diode array screening of the organic extract of the cultures of 13 isolates of the fungus Neofusicoccum parvum, the main causal agent of botryosphaeria dieback of grapevine, showed similar metabolites. One strain was selected for further chemical studies and led to the isolation and characterisation of 13 metabolites. Structures were elucidated through spectroscopic...

Université de Fribourg

Differential responses of three grapevine cultivars to Botryosphaeria dieback

Spagnolo, Alessandro ; Magnin-Robert, Maryline ; Alayi, Tchilabalo Dilezitoko ; Cilindre, Clara ; Schaeffer-Reiss, Christine ; Dorsselaer, Alain Van ; Clément, Christophe ; Larignon, Philippe ; Suero-Ramirez, Monserrat ; Chong, Julie ; Bertsch, Christophe ; Abou-Mansour, Eliane ; Fontaine, Florence

In: Phytopathology, 2014, p. -

Botryosphaeria dieback is a fungal grapevine trunk disease which represents a threat for viticulture worldwide due to the decreased production of affected plants and their premature death. This dieback is characterized by a typical wood discoloration called “brown stripe”. Herein, a proteome comparison of the brown striped wood from Botryosphaeria dieback-affected standing vines cultivar...