Accession Number : AD0772536

Title :   The Inhibitory Effects of Obtusaquinone on the Growth and Reproduction of Two Marine Fungi.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Bultman,John D. ; Felsenstein,Donna ; Ritchie,Donald D.

Report Date : 03 DEC 1973

Pagination or Media Count : 11

Abstract : The report describes a stage in the search for improved means of protecting wood used in the sea from deterioration caused by marine borers and fungi. In previous studies of 113 tropical species, the heartwood of Dalbergia retusa Hemsl. (Cocobolo) was found to be the most resistant to such organisms, and a pigment, obtusaquinone, was isolated from it. The fungistatic effects of this compound on two wood-inhabiting marine fungi, Pestalotia oxanthi Thumen and Chaetomium olivaceum Ames, have been determined at five solute concentrations. The minimum concentration of obtusaquinone necessary to produce a substantial inhibitory effect upon vegetative growth rate was about 200 ppm for both organisms. Reproduction of Chaetomium was inhibited at 125 ppm, that of Pestalotia at 200 ppm. (Author)

Descriptors :   *Fungicides, *Wood, *Fungus deterioration, *Quinones, Biodeterioration, Fungi, Trees, Protective treatments

Subject Categories : Microbiology
      Wood, Paper and Related Forestry Products

Distribution Statement : APPROVED FOR PUBLIC RELEASE