| new furan and cyclopentenone derivatives from the sponge-associated fungus hypocrea koningii pf04. | two new furan derivatives, hypofurans a and b (1 and 2), and three new cyclopentenone derivatives, hypocrenones a-c (3-5), along with seven known compounds (6-12), were isolated from a marine fungus hypocrea koningii pf04 associated with the sponge phakellia fusca. among them, compounds 10 and 11 were obtained for the first time as natural products. the planar structures of compounds 1-5 were elucidated by analysis of their spectroscopic data. meanwhile, the absolute configuration of 1 was deter ... | 2015 | 26343687 |
| trichoderma species occurring on wood with decay symptoms in mountain forests in central europe: genetic and enzymatic characterization. | the aim of this study was to explore the species diversity of trichoderma obtained from samples of wood collected in the forests of the gorce mountains (location a), karkonosze mountains (location b) and tatra mountains (location c) in central europe and to examine the cellulolytic and xylanolytic activity of these species as an expression of their probable role in wood decay processes. the present study has led to the identification of the following species and species complex: trichoderma atro ... | 2016 | 26586561 |
| biodegradation of polycyclic aromatic hydrocarbons by trichoderma species: a mini review. | fungi belonging to trichoderma genus are ascomycetes found in soils worldwide. trichoderma has been studied in relation to diverse biotechnological applications and are known as successful colonizers of their common habitats. members of this genus have been well described as effective biocontrol organisms through the production of secondary metabolites with potential applications as new antibiotics. even though members of trichoderma are commonly used for the commercial production of lytic enzym ... | 2015 | 26498812 |
| molecular evolution and phylogenetic analysis of biocontrol genes acquired from scot polymorphism of mycoparasitic trichoderma koningii inhibiting phytopathogen rhizoctonia solani kuhn. | the biocontrol agent trichoderma (t. harzianum, t. viride, t. virens, t. hamantum, t. koningii, t. pseudokoningii and trichoderma species) inhibited variably (15.32 - 88.12%) the in vitro growth of rhizoctonia solani causing root rot in cotton. the t. koningii mtcc 796 evidenced highest (88.12%) growth inhibition of test pathogen followed by t. viride nbaii tv23 (85.34%). scanning electron microscopic study confirmed mycoparasitism for mtcc 796 and tv23 which were capable of completely overgrowi ... | 2016 | 27720889 |
| chemical characterization of fatty acids, alkanes, n-diols and alkyl esters produced by a mixed culture of trichoderma koningii and penicillium janthinellum grown aerobically on undecanoic acid, potatoe dextrose and their mixture. | little is known about the mixed fungal synthesis of high-value aliphatics derived from the metabolism of simple and complex carbon substrates. trichoderma koningii and penicillium janthinellum were fed with undecanoic acid (uda), potatoe dextrose broth (pdb), and their mixture. pyrolysis field ionization mass spectrometry (py-fims) together with (1)h and (13)c nuclear magnetic resonance (nmr) characterized chcl3 soluble aliphatics in the fungal cell culture. data from nmr and py-fims analysis we ... | 2016 | 26852878 |
| trichoderma songyi sp. nov., a new species associated with the pine mushroom (tricholoma matsutake). | a new species, trichoderma songyi, was found to be associated with the pine mushroom (tricholoma matsutake) in korea. this species was isolated from three different substrates: tricholoma matsutake basidiomata, as well as roots of pinus densiflora and soil in the fairy ring. based on its molecular and phenotypic characteristics, we demonstrate that trichoderma songyi is unique and distinguishable from closely related species. we performed phylogenetic analyses based on two molecular markers, the ... | 2014 | 25052534 |
| cellulase production and saccharification of rice straw by the mutant strain hypocrea koningii rsc1. | the production of cellulase using solid-state fermentation of rice straw by the mutant strain hypocrea koningii rsc1 was studied. optimization of culture conditions, such as the nitrogen source, ph, and temperature, resulted in a maximum filter paper cellulase activity of 44.15 u g(-1) substrate, a carboxymethylcellulase activity of 324.6 u g(-1) substrate, and a β-glucosidase activity of 7.45 u g(-1) substrate. saccharification of untreated, 1% h(2)so(4)-treated, and 2.5% naoh-treated rice stra ... | 2014 | 23775722 |
| rna interference with carbon catabolite repression in trichoderma koningii for enhancing cellulase production. | the cellulase and xylanase genes of filamentous trichoderma fungi exist under carbon catabolite repression mediated by the regulator carbon catabolite repressor (crei). our objective was to find the role of crei in a cellulase-hyperproducing mutant of trichoderma koningii, and address whether enzyme production can be further improved by silencing the cre1 gene. cre1 partially silenced strains were constructed to improve enzyme production in t. koningii yc01, a cellulase-hyperproducing mutant. si ... | 2013 | 23769310 |
| Evaluation of cellulases produced from four fungi cultured on furfural residues and microcrystalline cellulose. | Four fungal strains-Trichoderma viride, Aspergillus niger, Trichoderma koningii, and Trichoderma reesei-were selected for cellulase production using furfural residues and microcrystalline cellulose (MCC) as the substrates. The filter paper activity (FPA) of the supernatant from each fungus was measured, and the performance of the enzymes from different fungal strains was compared. Moreover, the individual activities of the three components of the cellulase system, i.e., ß-glucosidase, endoglucan ... | 2011 | 22116409 |
| bioconversion of straw into improved fodder: preliminary treatment of rice straw using mechanical, chemical and/or gamma irradiation. | crude protein (cp) content of mechanically ground rice straw into small particles by an electric grinder and reducing value (rv) and soluble protein (sp) in the culture filtrate were lower than that of the chopped straw into 5~6 cm lengths when both ground and chopped straws were fermented with aspergillus ochraceus, a. terreus or trichoderma koningii, at steady conditions. the reduction rate of rv, sp and cp was 22.2, 2.4, 7.3%; 9.1, 4.9, 8.5% or 0.0, 0.0, 3.6% for the three fungi, respectively ... | 2006 | 24039464 |
| metabolism of nc11 fatty acid fed to trichoderma koningii and penicillium janthinellum ii: production of intracellular and extracellular lipids. | little is known about the fungal metabolism of nc10 and nc11 fatty acids and their conversion into lipids. a mixed batch culture of soil fungi, t. koningii and p. janthinellum, was grown on undecanoic acid (uda), a mixture of uda and potato dextrose broth (uda+pdb), and pdb alone to examine their metabolic conversion during growth. we quantified seven intracellular and extracellular lipid classes using iatroscan thin-layer chromatography with flame ionization detection (tlc-fid). gas chromatogra ... | 2014 | 25310811 |
| metabolism of n-c10:0 and n-c11:0 fatty acids by trichoderma koningii, penicillium janthinellum and their mixed culture: i. biomass and co2 production, and allocation of intracellular lipids. | the capacity of two soil fungi, trichoderma koningii and penicillium janthinellum, to oxidize n-c10:0 and n-c11:0 fatty acids to co2 and store intracellular lipids during growth is unknown. this article reports for the first time the metabolism of decanoic acid (da, c10:0), undecanoic acid (uda, n-c11:0), a mixture of the acids (uda+da) and a mixture of uda+ potato dextrose broth (pdb) by t. koningii and p. janthinellum and their mixed culture. a control pdb complex substrate was used as a subst ... | 2014 | 25310810 |
| establishment of an efficient rna silencing system in trichoderma koningii using dsred as a reporter. | we aimed to establish an efficient rna interference (rnai) system in the industrially important filamentous fungus trichoderma koningii using the dsred protein as a reporter of the silencing process. to accomplish this, a dsred expression cassette was transformed into t. koningii, and a recombinant strain that stably expressed dsred was obtained. next, a vector-directing expression of a dsred hairpin rna was constructed and transformed into the t. koningii recipient strain. approximately 79 % of ... | 2013 | 23588496 |
| improving cellulase production in trichoderma koningii through rna interference on ace1 gene expression. | ribonucleic acid interference (rnai) inhibits the expression of target genes in a sequence-specific manner, and shows potential for gene knockdown in filamentous fungi, in which the locus-specific gene knockout occurs in low frequency. in this study, the function of the repressor of cellulase expression i (acei) was verified in trichoderma koningii (t. koningii) yc01 through rnai, and ace1- silenced strains with improved cellulase productivity were obtained. an expression cassette that transcrib ... | 2012 | 22713991 |
| l-glutaminase production by trichoderma koningii under solid-state fermentation. | solid state fermentation was conducted for the production of l-glutaminase by trichoderma koningii oud.aggr. using different agro-industrial byproducts inlcuding wheat bran, groundnut residues, rice hulls, soya bean meal, corn steep, sesamum oil cake, cotton seed residues and lentil industrial residues as solid substrates. wheat bran was the best substrate for induction of l-glutaminase (12.1 u/mg protein) by t. koningii. the maximum productivity (23.2 u/mg protein) and yield (45.0 u/gds) of l-g ... | 2009 | 23100777 |