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Microb Pathog

Title:		Biocontrol of Botrytis cinerea and Calonectria gracilis by eucalypts growth promoters Bacillus spp
Author(s):		Paz ICP; Santin RCM; Guimaraes AM; Rosa O; Quecine MC; Silva M; Azevedo JL; Matsumura ATS;
Address:		"Laboratorio de Microbiologia Fitopatogica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. Electronic address: isapaz@gmail.com. Laboratorio de Microbiologia Fitopatogica, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. Tecnoplanta Florestal, Barra do Ribeiro, RS, Brazil. Departamento de Genetica, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de Sao Paulo, Piracicaba, SP, Brazil"
Journal Title:		Microb Pathog
Year:		2018
Volume:		20180517
Issue:
Page Number:		106 - 109
DOI:		10.1016/j.micpath.2018.05.026
ISSN/ISBN:		1096-1208 (Electronic) 0882-4010 (Linking)
Abstract:		"The clonal Eucalyptus plants are commonly obtained by vegetative propagation under a protected environment. This system improves the Botrytis cinerea and Calonectria spp infection on the young eucalypts plantings, resulting gray mold and cutting rot respectively. Currently, the unique available control method is based on chemicals. As alternative, novel methods to manage plant diseases, endophytic microorganisms could be an interesting alternative. Thus, we aimed to evaluate endophytic Bacillus isolated from eucalypts as a biocontrol agent against Botrytis cinerea and Calonectria gracilis, important fungal pathogens in the greenhouse, using clonal plantlets of E. urograndis. Eight endophytic strains of Bacillus, previously described as eucalyptus growth promoters, were evaluated in vitro and in vivo against Botrytis cinerea and Calonectria gracilis. The diffusible metabolites assay showed the potential of endophytic Bacillus to decrease the growth of both pathogens. Differences in the susceptibility of the pathogens to bacterial volatile metabolites were observed, B. cinerea showed more susceptible than Calonectria gracilis. In vivo assays, Bacillus amyloliquefaciens EUCB 10 demonstrated better overall reductions in these diseases. Based on the results obtained from the in vitro and in vivo analyses, we suggest that the endophytic B. amyloliquefaciens strain EUCB 10 constitutes a promising biocontrol agent against B. cinerea and Calonectria gracilis. Furthermore, this is the first reporting of B. amyloliquefaciens previously describe as plant growth promoter and also as potential control agent of B. cinerea and Calonectria gracilis to eucalyptus"
Keywords:		*Bacillus Biological Assay *Biological Control Agents Botrytis/*growth & development Eucalyptus/*microbiology Hypocreales/*growth & development Plant Diseases/microbiology Volatile Organic Compounds/chemistry Biological control Endophytic bacteria Eucalyp;
Notes:		"MedlinePaz, Isabel Cristina Padula Santin, Rita de Cassia Madail Guimaraes, Alexandre Martins Rosa, Osmar Paulo Pereira da Quecine, Maria Carolina Silva, Michele de Cassia Pereira E Azevedo, Joao Lucio Matsumura, Aida Terezinha Santos eng England 2018/05/20 Microb Pathog. 2018 Aug; 121:106-109. doi: 10.1016/j.micpath.2018.05.026. Epub 2018 May 17"