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Induced defense responses in tomato against bacterial spot by proteins synthesized by endophytic bacteria

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Induced defense responses in tomato against bacterial spot by proteins synthesized by endophytic bacteria

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Título Induced defense responses in tomato against bacterial spot by proteins synthesized by endophytic bacteria
Autor Lanna Filho, Roberto
Souza, Ricardo Magela de
Magalhães, Marcelo Marques
Villela, L.
Zanotto, Edgar Dutra
Ribeiro Júnior, Pedro Martins
Resende, Mário Lúcio Vilela de
Abstract Some endophytes can synthesize molecules that elicit the induction of plant resistance to infection by pathogens. The objective of this study was to demonstrate that protein fractions 42 and 75 from Bacillus amyloliquefaciens and Bacillus pumilus were capable of acting as elicitors of induced resistance in tomato plants against Xanthomonas vesicatoria, following partial resolution by gel-filtration chromatography. Tomato plants sprayed with protein fractions 42 and 75 reduced, respectively, 63.5 and 56.6% of bacterial spot, compared with control plants. Additionally, these fractions promoted the increase of peroxidase (POX) and polyphenol oxidase (PPO) enzyme activities in treated plants. In SDS-PAGE stained with silver nitrate, protein fractions 42 and 75 appeared as simple bands with estimated molecular mass of 28 and 43 kDa, respectively. We report the partial characterization of two macromolecules synthesized by endophytic bacteria that act as elicitors of systemic resistance in tomato against X. vesicatoria.
Contido em Tropical Plant Pathology, Brasília. Vol. 38, n. 4 (July-August 2013), p. 295-302
Assunto Bacteria
Controle biologico
Doença de planta
Tomate
[en] Bacillus amyloliquefaciens
[en] Bacillus pumilus
[en] Biological control
[en] Solanum lycopersicum
[en] Xanthomonas vesicatoria
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/109078
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