Spatio-temporal analyzes of soft rot progress on peaches inoculated with Rhizopus stolonifer

• Grant number: 12/03270-6
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• Start date: June 22, 2012
• End date: July 21, 2012
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Lilian Amorim
• Grantee: Juliana Silveira Baggio
• Supervisor: Bernhard Hau
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: Leibniz Universität Hannover, Germany
• Associated to the scholarship: 11/03034-8 - Penetration mechanisms of Rhizopus stolonifer on peach: biochemical, epidemiological and microscopic assay, BP.MS

Abstract

Rhizopus stolonifer is the causal agent of soft rot, one of the main postharvest diseases on peaches. The pathogen development is prejudicial to the stone fruit commercialization in wholesale markets in Brazil and can cause losses of 40 to 50% in the price of stone fruit, being one of the main causes of fruit rejection. The fungus has been responsible for causing rots in other types of fruit and vegetables, with similar level of losses. The presence of mechanical and physical damages in the fruit contributes to the infection by Rhizopus, which is known as a strictly wound parasite. Although, according to preliminary surveys of the main project (Processo FAPESP n° 2011/03034-8), it has been verified that unwounded fruit became infected when placed nearby peaches inoculated with R. stolonifer. The temporal progress and the spatial distribution of the disease were quantified in 13 in vivo experiments carried out under controlled conditions. However, mathematical models of adjustment to disease progress, traditionally used in plant disease epidemiology (i.e. logistic and monomolecular models), did not fit in these cases. Similarly, the spatial distribution models of diseases used to foliar pathosystems, i. e. dispersal rates and modified Taylor´s law, have shown methodological restrictions to the experimental data acquired for peach soft rot. Therefore, epidemiological analyzes with the aid of specific mathematical models are required to better understand soft rot progress and the R. stolonifer dispersion on peaches. These analyzes will be conducted at Leibniz Universität Hannover under advisement of Prof. Dr. Bernhard Hau. (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)

BAGGIO, J. S.; HAU, B.; AMORIM, L.. Spatiotemporal analyses of rhizopus rot progress in peach fruit inoculated with Rhizopus stolonifer. PLANT PATHOLOGY, v. 66, n. 9, p. 1452-1462, DEC 2017. (12/03270-6, 11/03034-8)