Please use this identifier to cite or link to this item:

TitleScreening of potential biocontrol bacterial against Pseudomonas savastanoi pv. savastanoi and elucidation of their mode of action
Author(s)Mina, Diogo
Pereira, José Alberto
Lino-Neto, T.
Baptista, Paula
KeywordsOlive knot disease
Pseudomonas savastanoi
Bacterial endophytes and epiphytes
Biological control
Issue date2017
CitationMina, Diogo; Pereira, J.A.; Lino-Neto, Teresa; Baptista, Paula (2017) - Screening of potential biocontrol bacterial against Pseudomonas savastanoi pv. savastanoi and elucidation of their mode of action. In 15th Congress of the Mediterranean Phytopathological Union, “Plant Health Sustaining Mediterranean Ecosystems”. Cordoba
Abstract(s)Over the last decades, the olive knot disease, caused by the bacterium Pseudomonas savastanoi pv. savastanoi (Psv), has been responsible for irreversible damages on olive orchards. Reduced vigor and stem dryness caused by this phytopathogen lead to a decrease in olive fruit production, conducting to countless losses for farmers. In this work, bacterial endophytes and epiphytes of olive tree phyllosphere were screened for the suppression of Psv, and several mechanisms behind this activity was also studied by evaluating indoleacetic acid (IAA), siderophore and lytic enzymes production. Interspecific interaction was assessed on solid media with agar overlays. IAA was estimated spectrophotometrically, whereas siderophores and lytic enzymes were evaluated qualitatively. Several bacterial species tested showed to reduce Psv growth up to 70%, as well as its viability. The highest inhibition was observed for Frondihabitans sp. and Paenibacillus sp. A reduction on production of both IAA and siderophore, which are associated with knot development, by Psv was noticed in the presence of the most efficient bacterial. Production of lytic enzymes by antagonists such as lipase, chitinase, protease and amylase was also identified. Altogether the results indicate that some of the bacterial tested have great potential as biocontrol agents due to their capacity to produce metabolites/lytic enzymes that can interfere with Psv growth and/or development of knots. These potential biological agents should be further evaluated under natural conditions.
AccessOpen access
Appears in Collections:CBFP - Resumos em livros de atas/Abstracts in proceedings
DBio - Comunicações/Communications in Congresses

Files in This Item:
File Description SizeFormat 
144.pdf240,58 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID