Plant Growth Promotion and Biocontrol of Pythium ultimum by Saline Tolerant Trichoderma Isolates under Salinity Stress.

摘要: This present study evaluates three isolates of Trichoderma as plant growth promoting or biological control agents: aggressivum f. sp. europaeum, saturnisporum, and the marine isolate obtained from Posidonia oceanica, longibrachiatum. The purpose is to contribute an overall reduction in pesticide residues fruit environment a decrease chemical fertilizers, excess which aggravates one most serious abiotic stresses, salinity. tolerance different increasing concentrations sodium chloride was evaluated vitro, well their antagonistic capacity against Pythium ultimum. effects strains on severity P. ultimum melon seedlings under saline conditions were also analysed. results reveal that Trichoderma, regardless origin, alleviate stress produced by salinity, resulting larger plants with air-dry weight percentage above 80% for T. longibrachiatum, increase root-dry close 50% when europaeum applied. Likewise, showed activity ultimum, reducing incidence disease, highest response found Biological saturnisporum reported first time, disease 62.96% 51.85%, respectively. description agent promoter. application these can be enormous benefit horticultural crops, both seedbeds greenhouses.