Influence of secondary metabolites of Trichoderma spp. development of fungi transmitted by seeds and germination of rice
DOI:
https://doi.org/10.5902/2179460X11291Keywords:
Oryza sativa L., seed treatment, antibiosis.Abstract
Rice seeds are degraded by a wide diversity of pathogens that affect the vigor and the germination. The fungus Trichoderma spp. has been used to treat seeds of various crops with sanitary and development of plants objectives. The aim of this research was to evaluate the influence of secondary metabolites of Trichoderma spp. in the development of fungus transmitted by seeds and in the germination of seeds of rice. Were used two isolates (TI1 and TM1) of Trichoderma spp. and conducted tests and experiments: isolation of fungi from seeds of rice; interference of non-volatile metabolites of Trichoderma spp. in the development of fungus transmitted by seed of rice; aseptic and germination test using different time of immersion of seeds in sodium hypochlorite; and the interference of non-volatile metabolites of Trichoderma spp. in the germination of rice seed. It was founded the fungi Fusarium spp., Penicillium spp. and Bipolaris oryzae on seeds of rice. It was occurred a interference of non-volatile metabolites of two isolates of Trichoderma spp. in the mycelial growth of Fusarium and Bipolaris oryzae. The sterilization test showed that the optimal time of immersion in sodium hypochlorite was 15 min and that the secondary metabolites of Trichoderma spp. did not affect germination of seed. Therefore, secondary metabolites released by Trichoderma spp. interfere in the development of Bipolaris oryzae and Fusarium spp. transmitted by seeds of rice. However, they do not interfere in the germination of seeds of rice.Downloads
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