Bioprospecting of fluorescent bacteria of the genus Pseudomonas in the biocontrol of the foliar blight of signal grass (Urochloa brizantha)

• Grant number: 17/03403-0
• Support type: Scholarships in Brazil - Master
• Effective date (Start): August 01, 2017
• Effective date (End): July 31, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal researcher: Paulo Cezar Ceresini
• Grantee: Samara Nunes Campos Vicentini
• Home Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

This study aims to determine if fluorescent bacteria from the genus Pseudomonas from non-disturbed potentially suppressive Amazonian soils have potential as biocontrol agents against Rhizoctonia solani anastomosis group AG-1 IA, the causal agent of the foliar blight and sudden death of pastures from genus Urochloa (formerly Brachiaria), in the Northern region of Brazil. This disease causes great losses in pasture yields in Brazil and is particularly difficult for management. Considering the inexistence of any economically viable, ecologically sustainable and even slightly efficient management strategies for this disease, biological control seems to be the only alternative to minimize the impact of the foliar blight and death of signal grass pastures. Specifically, we aim to: Perform molecular identification of selected fluorescent Pseudomonas isolates as potential biocontrol agents; ii. Carry out an in vitro screening of fluorescent Pseudomonas isolates for their potential as biocontrol agents of R. solani AG-1 IA; and iii. Determine if the in vitro selected bacterial strains maintain the in vivo biocontrol ability of the foliar blight disease on signal grass. Because these bacteria were obtained from non-disturbed potentially suppressive soils in areas close to where foliar blight disease occurs, our hypothesis is that potential biocontrol agents selected in our study will be able to control the disease when reintroduced in the pasture agroecosystems from Northern Brazil. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PRISCILA SANTOS CASADO; GISELLE DE CARVALHO; PAULO CEZAR CERESINI; VANINA LILIAN CASTROAGUDÍN; OMAR JORGE SABBAG; SAMARA NUNES CAMPOS VICENTINI; JOÃO LEODATO NUNES MACIEL. Método eficiente, baseado em leitores de microplaca, para detecção de resistência a fungicidas triazóis (IDM) e estrobirulinas (IQe) em populações do patógeno da brusone do trigo. Summa Phytopathologica, v. 44, n. 3, p. 236-244, 2018-09-00. (13/10655-4, 15/10453-8, 17/03403-0)

CHAVARRO-MESA, EDISSON; CERESINI, PAULO; PEREIRA, DANILO; VICENTINI, SAMARA; SILVA, TATIANE; RAMOS-MOLINA, LINA; NEGRISOLI, MATHEUS; SCHURT, DANIEL; VIEIRA JUNIOR, JOSE R.. A broad diversity survey of Rhizoctonia species from the Brazilian Amazon reveals the prevalence of R. solani AG-1 IA on signal grass and the new record of AG-1 IF on cowpea and soybeans. PLANT PATHOLOGY, v. 69, n. 3, JAN 2020. (11/50150-3, 11/23050-8, 13/11944-0, 17/03403-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

VICENTINI, Samara Nunes Campos. Bioprospecting and phylogeny of fluorescent bacteria of the genus Pseudomonas as potential biocontrol agents of the foliar blight of signal grass. 2018. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira Ilha Solteira.