Accession Number : AD0673077

Title :   THE CO-MOVEMENT OF H(+) AND NA(+) AT THE ONSET OF PHOTOSYNTHESIS IN ULVA, IN RELATION TO OTHER IONS,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s) : Cummins,Joseph T. ; Strand,John A. , III ; Vaughan,Burton E.

Report Date : 17 MAY 1968

Pagination or Media Count : 23

Abstract : A rapid extrusion of sodium from Ulva, induced by light, also occurs with other cations as evidenced by 86Rb and 85Sr tracer studies; anion movement (36Cl, 35S-sulfate and 14C-acetate) is not affected by light. The sodium flux has a pH optimum of about pH 8, and has a time constant similar to that for co-movement of H(+) and HCO3(-) concerned in photosynthesis. Substitution experiments indicate that only HCO3(-) is necessary for the short term light induced ion movements. (Author)

Descriptors :   (*ALGAE, PHOTOSYNTHESIS), (*PHOTOSYNTHESIS, *ELECTROLYTES(PHYSIOLOGY)), HYDROGEN, SODIUM, TRANSPORT PROPERTIES, TRACER STUDIES, RADIOACTIVE ISOTOPES, ION EXCHANGE, PH FACTOR, BICARBONATES, RADIOACTIVE CONTAMINATION

Subject Categories : Biochemistry
      Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE