Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 10 April 1964:
Vol. 144. no. 3615, pp. 174 - 177
DOI: 10.1126/science.144.3615.174
Prev | Table of Contents | Next

Articles

Polar Transport of Calcium in The Primary Root of Zea mays

Evan C. Evans III 1

1 Biological and Medical Sciences Division, U. S. Naval Radiological Defense Laboratory, San Francisco, California 94135

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.

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)