Bioprospecting of Saprobe Fungi from the Semi-Arid North-East of Brazil for the Control of Anthracnose on Sorghum

Autor(es)

Resende, Renata Sousa ^[1] ; Milagres, Cristiane Aparecida ^[1] ; Rezende, Danielle ^[1] ; Aucique-Perez, Carlos Eduardo ^[1] ; Rodrigues, Fabricio Avila ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Vicosa, Dept Fitopatol, Lab Interacao Planta Patogeno, BR-36570900 Vicosa, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYTOPATHOLOGY; v. 163, n. 10, p. 787-794, OCT 2015.
• Citações Web of Science: 2

Resumo

Anthracnose, caused by the hemiotrophic fungus Colletotrichum sublineolum, is one of the most important diseases affecting sorghum production worldwide. The main goal of this study was to select saprobe fungi from the semi-arid north-east of Brazil that could increase sorghum resistance to anthracnose and investigate this increased resistance at both physiological and biochemical levels. Plants were sprayed with Curvularia inaequalis, Gonytrichum macroladum, Memnoniella levispora, Pithomyces chartarum, Periconia hispidula, Phaeoisaria clematidia, Dictyochaeta heteroderae, Sarcopodium circinatum, Periconia byssoides, Moorella speciosa, Stachybotrys chartarum, Pseudobotrytis terrestres, Memnoniella echinata, Stachybotrys globosa and Gonytrichum clamydosporium 24h before inoculation with C.sublineolum. Plants sprayed with water served as the control treatment. The area under the anthracnose progress curve was significantly reduced in comparison with the control treatment only for plants sprayed with C.inaequalis. Therefore, C.inaequalis was selected for physiological and biochemical evaluations. The peroxidases, chitinases and -1,3-glucanases activities were significantly higher for plants sprayed with C.inaequalis and inoculated with C.sublineolum than for plants not sprayed with C.inaequalis and inoculated with C.sublineolum. There was no apparent decrease in the values of net carbon assimilation rate, stomatal conductance to water vapour or transpiration rate for plants sprayed with C.inaequalis and infected by C.sublineolum in comparison with plants not sprayed with C.inaequalis and infected by C.sublineolum. In conclusion, sorghum resistance against C.sublineolum infection was greatly potentiated by C.inaequalis without any apparent change in the photosynthetic capacity of the infected plants. (AU)

• Processo FAPESP: 10/52343-0 - Bioprospecção de fungos sapróbios no PPBIO/ semi-árido nordestino para o controle de doenças infecciosas em plantas: indução de resistência
• Beneficiário: Sérgio Florentino Pascholati
• Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Regular