Accession Number:

AD0639836

Title:

TRANSPORT OF CALCIUM AND STRONTIUM IN THE PRIMARY ROOT OF ZEA MAYS,

Descriptive Note:

Corporate Author:

NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s):

Report Date:

1966-02-28

Pagination or Media Count:

21.0

Abstract:

Root segments, 55 mm long, were exposed to nutrient containing Sr85 and Ca45 tracers. From 0.25 to 5.0 mM Ca, calcium transport was comparatively unaffected by concentration but from 0.05 to 0.25 mM, it fell off sharply. The maximum transport of strontium from nutrient containing 0.05 mM Ca was twice that from 2.5 mM Ca, and also twice the maximum calcium transported. Thus, under the condition simulating calcium depletion, i.e., 0.05 mM Ca, greater proportions of strontium were transported. In simultaneous determinations, the ratio of Sr to Ca moved was equal to the ratio of their concentrations in nutrient solution. Dinitrophenol inhibited Ca and Sr movement similarly. Author

Subject Categories:

  • Biology
  • Radiobiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE