There is no consensus on the demarcation between the two groups, but typically, a fungus that has a thermal maximum near 50 °C and a minimum below 20 °C is regarded as thermotolerant, while those that grow at 50 °C or above, but not grow at 20 °C or above are regarded as thermophilic.Tags: Assignment Of Cause Of ActionA Manual For Writers Of Term PapersEssays On Healthy EatingHow To Write An Introduction For A Narrative EssayHomework Help NycPlagiarism AssignmentCommunication Between Genders Essay
Fungal secretomes of all 105 strains produced during growth on untreated rice straw were studied for lignocellulolytic activity at different p H and temperatures.
The endoglucanase and xylanase activities differed substantially between the different species and strains, but in general, the enzymes produced by the novel Thielavia spp.
The remaining 27 strains could not be reliably assigned to any known species.
Phylogenetically, they belonged to the genus Thielavia, but they represented 23 highly divergent genetic groups different from each other and from the closest known species by 12 to 152 nucleotides in the ITS region.
Maximum growth temperatures of the strains were in the range 50 °C to 60 °C.
Sequencing of the internal transcribed spacer (ITS) regions indicated that 78 fungi belonged to 12 species of Ascomycota and 3 species of Zygomycota, while no fungus of Basidiomycota was detected.
As a result of increased interest in renewable sources of energy and biomaterials, fungi that are adapted to extreme environmental conditions have recently received special interest as sources of novel hydrolytic enzymes suitable for various technological applications.
Genome sequences have been obtained for a large number of thermophilic fungi, such as Myceliophthora thermophila, Thielavia terrestris, Thielavia heterothallica, Chaetomium thermophilum, Thermomyces lanuginosus, T.
A range of genes encoding lignocellulolytic enzymes in the acidophilic fungus Acidomyces acidothermus MEY-1 has been cloned and expressed.
The enzymes were found to be thermotolerant and functional under acidic conditions.