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Science 9 June 1967:
Vol. 156. no. 3780, pp. 1380 - 1381
DOI: 10.1126/science.156.3780.1380
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Articles

Acropetal Movement of Auxin: Dependence on Temperature

George W. Keitt Jr. 1 and Robert A. Baker 1

1 Department of Biological Science, Florida State University, Tallahassee 32306

The amounts of radioactive indole-3-acetic acid that moved, both basipetally and acropetally, through short sections of bean epicotyl were measured at 15° and 25°C in the presence and absence of 2,3,5-triiodobenzoic acid. Low temperature and this second compound each inhibited acropetal efflux of indole 3-acetic acid more than they did the influx. Results are interpreted as supporting a metabolically dependent component of the acropetal movement of auxin in bean epicotyls.

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