Chemistry: molecular biology and microbiology – Micro-organism – per se ; compositions thereof; proces of... – Fungi
Patent
1996-04-17
1999-03-16
Marx, Irene
Chemistry: molecular biology and microbiology
Micro-organism, per se ; compositions thereof; proces of...
Fungi
435 932, 435 935, 424911, C12N 114, A01N 1300
Patent
active
058829156
ABSTRACT:
A process for producing strains of Trichoderma virens which are deficient for production of viridiol for use as biocontrol agents is disclosed. These mutant strains are produced by treatment of viable T. virens with chemical or physical mutagens, preferably by irradiation with ultraviolet light. The treated fungi are then screened for production of viridiol to select for deficient strains. Following recovery, the mutant strains may be used as biocontrol agents for the control of plant diseases by application to the locus of a plant, seedling or seed to be protected. Coating seeds with the biocontrol agent prior to planting has been found to be particularly effective for the control of soilborne root or seedling diseases.
REFERENCES:
patent: 5268173 (1993-12-01), Howell et al.
Howell, C.R. and Stipanovic, R. D., "Mechanisms in Cotton Soreshin Biocontrol by Trichoderma Virens: Viridiol Production", distributed Jan. 10, 1996 at the Beltwide Cotton Prod. Res. Conference.
Howell, C.R. and Stipanovic, R.D., "The biocontrol efficacy and phytotoxicity of viridiol-deficient mutants of Gliocladium virens", handed out Apr. 18, 1995 at Fifth International Trichoderma/Gliocladium Workshop.
Jones, Richard W. and Hancock, Joseph G., "Conversion of viridin to viridiol by viridin-producing fungi", Can J. Microbiol., vol. 33, 1987, pp. 963-966.
Howell, Charles R., and Stipanovic, Robert D., "Gliovirin, a new antibiotic from Gliocladium virens, and its role in the biological control of Pythium ultimum", Can. J. Microbiold., vol. 29, Mar. 1983, pp. 321-324.
Wilhite et al., Phi/to Pathology, 84:816-21, 1994.
Ahmad et al., Can. J. Microbiol., 1988, 34(5), 694-6.
Howell et al., Can. J. Microbiol, 1983, 29(3) 321-324.
Demain et al., Manual of Industrial Microbiology and Biotechnology, 1986, ASM.
Deck Randall E.
Fado John D.
Marx Irene
Silverstein M. Howard
The United States of America as represented by the Secretary of
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