Use of beneficial bacteria and their secondary metabolites to control grapevine pathogen diseases

Abstract

International audienceGrapevine is one of the most important economic crops yielding berries, wine products as well as derivates. However, due to the large array of pathogens inducing diseases on this plant, considerableamounts of pesticides—with possible negative impact on the environment and health—have been used and are currently used in viticulture. To avoid negative impacts of such products and to ensure product quality, a substantial fraction of pesticides needs to be replaced in the near future. One solution can be related to the use of beneficial bacteria inhabiting the rhizo- and/or the endosphere of plants. These biocontrol bacteria and their secondary metabolites can reduce directly or indirectly pathogen diseases by affecting pathogen performance by antibiosis, competition for niches and nutrients, interference with pathogen signaling or by stimulation of host plant defenses. Due to the large demand for biocontrol of grapevine diseases, such biopesticides, their modes of actions and putative consequences of their uses need to be described. Moreover, the current knowledge on new strains from the rhizo- and endosphere and their metabolites that can be used on grapevine plants to counteract pathogen attack needs to be discussed. This is in particular with regard to the control of root rot, grey mould, trunk diseases, powdery and downy mildews, pierce’s disease, grapevine yellows as well as crown gall. Future prospects on specific beneficial microbes and their secondary metabolites that can be used as elicitors of plant defenses and/or as biocontrol agents with potential use in a more sustainable viticulture will be further discussed

Advances in plant growth-promoting bacterial inoculant technology: formulations and practical perspectives (1998–2013)

“…Many elicitors of plant defenses and secondary metabolites of PGPB are well documented. These microbial products, if produced commercially, have potential as "inoculants" for reducing agrochemical use (Compant et al 2012). For example, lipochito-oligosaccharides (LCOs) nod factors (Marks et al 2013) secreted by rhizobia play a key role in the induction of nodules on the roots of legumes (Truchet et al 1991).…”

Induction of systemic resistance to Agrobacterium tumefaciens by endophytic bacteria in grapevine

“…Several reports on grapevine concern the role of beneficial bacteria including endophytic bacteria in biological control of grapevine diseases through induction of systemic resistance (Compant et al , 2013).…”

Microbial diversity in leaves, trunk and rhizosphere of coconut palms (Cocos nucifera L.) associated with the coconut lethal yellowing phytoplasma in Grand-Lahou, Cte dIvoire

“…Indeed, one of the latest trends is the identification of fungal or bacterial endophytes with biocontrol potential against phytoplasmas (Compant et al, 2013;Martini et al, 2009;Romanazzi et al, 2009). Endophytes refer to endosymbionts that colonise the inside of the plants without causing any disease to the plant host (Schulz and Boyle, 2006;Wilson, 1995).…”