Accession Number : AD0762469

Title :   Microbial Degradation of DDT.

Descriptive Note : Annual rept. no. 1, 1 Jul 72-30 Jun 73,

Corporate Author : CORNELL UNIV ITHACA N Y DEPT OF AGRONOMY

Personal Author(s) : Alexander,Martin

Report Date : 01 JUL 1973

Pagination or Media Count : 26

Abstract : Over 110 marine bacteria were isolated and tested for their ability to convert DDT to water-soluble products. Forty-seven were found to convert 5% to 10% of the 14C-DDT to water-soluble products, 38 solubilized less than 5% of the insecticide, and 29 were apparently inactive by the test methods employed. Mucor alternans, a fungus exceptionally active in producing water-soluble metabolites from DDT, was used as a model for determining the identities of the water-soluble metabolites. Although these compounds have not yet been identified, they are not DDT, DDA, DBH, DBP, PCPA, or 2-chlorosuccinic acid. Therefore, previously uncharacterized products are probably formed by M. alternans. The hypothesis that nutrient availability is limiting DDT degradation is now being tested. For this purpose natural microbial communities of sea water containing bottom sediments are being subjected to a large number of different treatments in an attempt either to enrich for DDT-degrading organisms or to provide the conditions necessary for rapid DDT decomposition. (Author)

Descriptors :   (*DDT, DEGRADATION), CHEMICAL ANALYSIS, BACTERIA, SAMPLING, METABOLISM, SEA WATER, MICROBIOLOGY, INSECTICIDES, WATER POLLUTION, COASTAL REGIONS

Subject Categories : Microbiology
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE