title: Successive construction of cellulase hyperproducers of Trichoderma using hyperpolyploids.
abstract: When the swollen conidia of Trichoderma reesei QM 6a are treated with 0.1% (w/v) colchicine solution, huge autopolyploid nuclei can be formed in those swollen conidia. When a mycelial mat derived from such a conidum is treated with a haploidizing reagent, benomyl, many fan-shaped sectors are produced from the colony, and cellulase hyperproducers are selected from conidia on the colony. When colchicine and benomyl treatments are repeated on cellulase hyperproducers, new hyperproducers can be constructed successively and systematically. Moreover, when conidia derived from autopolyploids are treated with ethylmethanesulfonate solution, another type of cellulase hyperproducers (polyploids) can be obtained.
authors.affiliation: Department of Food Science and Technology, Faculty of Horticulture, Minamikyushu University, Miyazaki, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Toyama
authors.forename: N
authors.initials: N
authors.lastname: Toyama
mesh_terms: D001542:Benomyl / Q000494:pharmacology; D002480:Cellulase / Q000235:genetics* / Q000378:metabolism*; D003078:Colchicine / Q000494:pharmacology; D003470:Culture Media; D011123:Polyploidy; D014242:Trichoderma / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development
chemical_list: D003470:Culture Media; D002480:Cellulase; D003078:Colchicine; D001542:Benomyl