Accession Number : AD0707127

Title :   BIOLOGY, BIOCHEMISTRY, AND PHYSIOLOGY OF THE PHOTOSYNTHETIC SULFUR BACTERIA.

Descriptive Note : Final technical rept. 1 Sep 62-1 Feb 69,

Corporate Author : STATE UNIV OF NEW YORK STONY BROOK DIV OF BIOLOGICAL SCIENCES

Personal Author(s) : Battley,Edwin H.

Report Date : 01 FEB 1969

Pagination or Media Count : 17

Abstract : Over one hundred different isolates of photosynthetic sulfur and non-sulfur bacteria were obtained through the technique of selecting for the growth of these organisms with a medium rich in organic compounds. However, attempts to identify these organisms as to species were met with little success, largely because of a lack of unambiguous criteria with which to make the identifications. For this reason, techniques were sought with which to physiologically characterize the organisms on the basis of temperature maxima, minima, and optima, pH maxima and minima, and the maximum osmotic pressure for growth. The research resulted in the development of a continuous thermal gradient technique with which to make the temperature characterizations, a discontinuous pH gradient technique with which to make the pH characterizations, and a discontinuous osmotic pressure gradient with which to make the osmotic pressure characterizations. Characterizations were carried out with Rhodopseudomonas capsulata, R. gelatinosa, R. palustris, and R. spheroides with respect to growth in a defined medium on several separate carbon sources. (Author)

Descriptors :   (*BACTERIA, *SULFUR), PHOTOSYNTHESIS, GROWTH(PHYSIOLOGY), CULTURE MEDIA, PH FACTOR, TEMPERATURE, CARBON, PHYSIOLOGY, PSEUDOMONADALES

Subject Categories : Microbiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE