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Trichoderma harzianum
About: Trichoderma harzianum is a research topic. Over the lifetime, 4731 publications have been published within this topic receiving 96796 citations.
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TL;DR: In this paper, an extractive fermentation process for 6-pentyl-α-pyrone (6PP) production by Trichoderma harzianum was scaled-up from 500ml shake flasks to 10l stirred tank bioreactors keeping constant the volumetric power drawn (P / V ).
48 citations
TL;DR: The results suggest that pyrosequencing represents a useful method for studying microbial interactions in the phyllosphere and suggest that the increasing use of biological control agents against Botrytis cinerea in strawberry raises the question of whether there are any undesirable impacts of foliar applications of BCAs on nontarget microorganisms in thePhyllosphere.
Abstract: The increasing use of biological control agents (BCAs) against Botrytis cinerea in strawberry raises the question of whether there are any undesirable impacts of foliar applications of BCAs on nontarget microorganisms in the phyllosphere. Therefore, our objective was to investigate this issue within a field study. Strawberry plants were repeatedly sprayed with three BCAs—namely, RhizoVital 42 fl. (Bacillus amyloliquefaciens FZB42), Trianum-P (Trichoderma harzianum T22), and Naturalis (Beauveria bassiana ATCC 74040)—to suppress Botrytis cinerea infections. Microbial communities of differentially treated leaves were analyzed using plate counts and pyrosequencing and compared with the microbial community of nontreated leaves. Plate count results indicate that the applied Bacillus and Trichoderma spp. survived in the strawberry phyllosphere throughout the strawberry season. However, no significant impacts on the leaf microbiota could be detected by this culture-dependent technique. Pyrosequencing of ...
48 citations
TL;DR: Four isolates of Trichoderma harzianum Rifai inhibited linear growth and microsclerotia production in Macrophomina phaseolina in vitro and resulted in an earlier development of fruit.
48 citations
TL;DR: Six anthraquinones were purified from Trichoderma harzianum strain Th-R16 to evaluate their biological activities, and low yield compounds, like 1,5-dihydroxy-3-hydroxymethyl-9,10-anthraquinone, were found to be more active against fungal pathogens than pachybasin and crysophanol, which were finding to be the major extracellular metabolites.
Abstract: The biocontrol fungal species of Trichoderma, which colonizes plant roots, are well-known for their potential to control plant pathogens. Six anthraquinones, of which four have been identified for the first time from Trichoderma and two have already been reported in other strains, were purified from Trichoderma harzianum strain Th-R16 to evaluate their biological activities. The structures of the compounds were determined by one- and two-dimensional NMR. The compounds were shown to exhibit stronger antifungal activity than antibacterial activity. Low yield compounds, like 1,5-dihydroxy-3-hydroxymethyl-9,10-anthraquinone, were found to be more active against fungal pathogens than pachybasin and crysophanol, which were found to be the major extracellular metabolites. Test anthraquinones with higher oxidation numbers had better antifungal activity, and their activities were concentration-dependent.
48 citations
TL;DR: The study implies that it is possible to develop a dye removal system by using T. harzianum biomass, which occurs as sludge in waste stream of fermentation industries, and shows that the pseudo-second-order kinetic model provided the best correlation of the equilibrium data.
48 citations