Accession Number : AD0634835

Title :   SODIUM TRANSPORT IN ULVA,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

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

Report Date : 05 JUL 1966

Pagination or Media Count : 19

Abstract : The transport of sodium through the marine algae Ulva lobata and Ulva expansa has been studied by a tracer analytical method. Sodium was transported across Ulva at a rate of 0.15%/min in the dark; this rate was slowed by ouabain and increased by formaldehyde. Dinitrophenol DCMU, and ammonium ion had no effect on the dark rate. Light caused a transient, rapid light extrusion of sodium from the algae equal to approximately twice the amount of sodium expected during a two minute dark period. All the inhibitors adversely affected the efflux of sodium due to light. Comparison of the ability of choline and sucrose to elute sodium from Ulva showed that a high portion of the sodium can be released, but only by a process similar to ion exchange. (Author)

Descriptors :   (*MARINE BIOLOGY, PHOTOSYNTHESIS), (*PHOTOSYNTHESIS, *ALGAE), SODIUM, TRANSPORT PROPERTIES, PERMEABILITY, TRACER STUDIES, RADIOACTIVE ISOTOPES, FORMALDEHYDE, CARDIAC GLYCOSIDES, NITROPHENOLS, IONS, CHOLINES, SUCROSE, ION EXCHANGE, INHIBITION

Subject Categories : Biochemistry
      Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE