Little is known about the biology of members of the bacterial genus Lysobacter although it encompasses species with high potential in plant protection. In this work, we investigated on biological features of L. capsici AZ78 a strain capable to control of Plasmopara viticola, the causal agent of grapevine downy mildew. Interestingly, it has been assessed that AZ78 resists copper ions and its resistance to this metal is probably due to the presence of genes coding for copper oxidase (copA) and copper exporting PIB-type ATPases (ctpA). Resistance to copper allowed L. capsici AZ78 to be combined with a low-dose of a copper-based fungicide, leading to more effective control of grapevine downy mildew. Furthermore, L. capsici AZ78 persists in the phyllosphere of grapevine plants and tolerates environmental stresses such as starvation, freezing, mild heat shock and UV light irradiation. These biological traits suggest that L. capsici AZ78 could be a suitable candidate for developing a new biofungicide to be used in combination with copper to control grapevine downy mildew.

Puopolo, G.; Giovannini, O.; Pertot, I. (2013). Resistance to copper in Lysobacter capsici AZ78: a starting point for the development of a new sustainable management of Plasmopara viticola?. In: IOBC-WPRS Meeting of the Working Group on "Integrated Protection and Production in Viticulture", Ascona, Switzerland, 13-17 October 2013: 145. url: http://goo.gl/ivTwmP handle: http://hdl.handle.net/10449/23444

Resistance to copper in Lysobacter capsici AZ78: a starting point for the development of a new sustainable management of Plasmopara viticola?

Puopolo, Gerardo;Giovannini, Oscar;Pertot, Ilaria
2013-01-01

Abstract

Little is known about the biology of members of the bacterial genus Lysobacter although it encompasses species with high potential in plant protection. In this work, we investigated on biological features of L. capsici AZ78 a strain capable to control of Plasmopara viticola, the causal agent of grapevine downy mildew. Interestingly, it has been assessed that AZ78 resists copper ions and its resistance to this metal is probably due to the presence of genes coding for copper oxidase (copA) and copper exporting PIB-type ATPases (ctpA). Resistance to copper allowed L. capsici AZ78 to be combined with a low-dose of a copper-based fungicide, leading to more effective control of grapevine downy mildew. Furthermore, L. capsici AZ78 persists in the phyllosphere of grapevine plants and tolerates environmental stresses such as starvation, freezing, mild heat shock and UV light irradiation. These biological traits suggest that L. capsici AZ78 could be a suitable candidate for developing a new biofungicide to be used in combination with copper to control grapevine downy mildew.
Lysobacter capsici
Grapevine
Biocontrol
Lysobacter capsici
Vite
Biocontrollo
Puopolo, G.; Giovannini, O.; Pertot, I. (2013). Resistance to copper in Lysobacter capsici AZ78: a starting point for the development of a new sustainable management of Plasmopara viticola?. In: IOBC-WPRS Meeting of the Working Group on "Integrated Protection and Production in Viticulture", Ascona, Switzerland, 13-17 October 2013: 145. url: http://goo.gl/ivTwmP handle: http://hdl.handle.net/10449/23444
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