Abstract
Trichoderma is a Deuteromycetous fungus with hyphae long, creeping, conidiophores erect, philiadic, having conidial heads. Trichoderma species produces a chemical, trichodermin; it is the sesquiteroenoid acting as a bio-control agent on the principal of myco-parasitism, antibiosis and competition to control soil borne plant pathogens. The phytotoxic effect was screened by treating cereal crop seeds with culture filtrate of Trichoderma species, the effect of culture filtrate was measured in terms of seed germination percentage and results were compared with control one. The obtained results shows percentage of germination in treated seeds was more than the control. The culture filtrate of Trichoderma harzianum showed superior effects (95-97%) than that of Trichoderma viridae (90-95%) and Trichoderma virens (86-92%) on the seed germination of selected cereal crop seeds
Highlights
In advanced technology of agriculture, use of Trichoderma species as bio-control agents for the management of crop plant diseases, it becomes a modern trend
The detection of phytotoxin from the Trichoderma species were examined by treating of culture filtrates with seeds of selected cereal crop plants
The culture filtrates of Trichoderma species showed effect on seed germination, this indicates that extracellular metabolites in culture filtrates of Trichoderma species exhibited their effects on the seed germination; this indicates that extracellular metabolites in culture filtrate of Trichoderma species showed their effects on seed germination
Summary
In advanced technology of agriculture, use of Trichoderma species as bio-control agents for the management of crop plant diseases, it becomes a modern trend. Apart from enzymes, the species of Trichoderma are producers of various metabolites with toxic antibiotic properties (Bruckner et al, 1990., Dennis and Webster, 1971., Stepanovic and Howell, 1982., Tomoda et al.1992., Huang et al 1995). The species of Trichoderma are known to inactivate the phytotoxins produced by many plant pathogenic fungi. Culter and Le Flies (1978) reported that Trichodermin is a potent inhibitor of plant growth and produces other phytotoxic effects. It inhibits wheat coleoptile growth; phytotoxic to tobacco at high concentration and inhibits growth at lower concentrations
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