Effect of Cell-free Culture Filtrates of Bio-control Agents on the Spore Germination and Infection by Phytophthora Infestans Causing Late Blight of Potato
نویسندگان
چکیده
Potato ranks fourth as the most important food crop in the world. The crop is known to suffer from many diseases among which late blight is more devastating. Therefore, culture filtrates of bio-control agents, (Trichoderma virens, Trichoderma viride, Paecilomyces lilacinus and Pseudomonas fluorescens) were tested for their effectiveness on the spore germination and infection in-vitro, as fungicides usage leads to more production cost, besides development of fungicide resistance. Trichoderma virens, Trichoderma viride and Pseudomonas fluorescens culture filtrates showed no spore germination at all the dilution ratios of culture filtrate (CF) and sterile distilled water (SDW) after 48 hours of incubation. In detached leaf assay for infection studies T. virens, T. viride and P. fluorescens culture filtrates inhibited infection by P. infestans at all the dilution ratios. Trichoderma virens culture filtrate completely inhibited infection in green house grown potato plants. T. viride culture filtrate showed 45% of the plant infection.
منابع مشابه
Time-course investigation of Phytophthora infestans infection of potato leaf from three cultivars by quantitative proteomics.
Potato late blight is one the most important crop diseases worldwide. Even though potato has been studied for many years, the potato disease late blight still has a vast negative effect on the potato production [1], [2], [3]. Late blight is caused by the pathogen Phytophthora infestans (P. infestans), which initiates infection through leaves. However, the biological activities during different ...
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