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Bioprospecting of Saprobe Fungi from the Semi‐Arid North‐East of Brazil for the Control of Anthracnose on Sorghum
Author(s) -
Resende Renata Sousa,
Milagres Cristiane Aparecida,
Rezende Danielle,
AuciquePerez Carlos Eduardo,
Rodrigues Fabrício Ávila
Publication year - 2015
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12376
Subject(s) - biology , inoculation , sorghum , horticulture , fungus , venturia inaequalis , transpiration , botany , agronomy , fungicide , photosynthesis
Anthracnose, caused by the hemiotrophic fungus C olletotrichum 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 B razil that could increase sorghum resistance to anthracnose and investigate this increased resistance at both physiological and biochemical levels. Plants were sprayed with C urvularia inaequalis , G onytrichum macroladum , M emnoniella levispora , P ithomyces chartarum , P ericonia hispidula, P haeoisaria clematidia, D ictyochaeta heteroderae, S arcopodium circinatum, P ericonia byssoides, M oorella speciosa , S tachybotrys chartarum , P seudobotrytis terrestres , M emnoniella echinata , S tachybotrys globosa and G onytrichum clamydosporium 24 h 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 β ‐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.