Polar Transport of Calcium in The Primary Root of Zea mays

Science  10 Apr 1964:
Vol. 144, Issue 3615, pp. 174-177
DOI: 10.1126/science.144.3615.174


Transport of calcium-45 in 20-mm root segments is basipetal and requires metabolic maintenance. Such transport reaches a maximum rate after immersion of the roots in tracer solution for approximately 12 hours and is still pronounced after 50 hours. Acropetal movement is slight, probably non-metabolic, and essentially constant. Amounts transported are linearly dependent on the absorbing area exposed to tracer solution.