Plant Physiol. Drug Metab Dispos
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Plant Physiology 54:310-311 (1974)
© 1974 American Society of Plant Biologists

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Articles

Polarity of Thiamine Movement through Tomato Petioles 1,2

Stefan P. Kruszewski and William P. Jacobs

a Department of Biology, Princeton University, Princeton, New Jersey 08540

Thiamine-14C moved through petiolar sections of Lycopersicon esculentum Mill. var. Michigan State Forcing with striking similarity in kinetics to auxins and gibberellic acid moving through similar sections of other green plants. Thiamine moved with strong basipetal polarity, at a velocity of 3 to 5 mm per hour, and emerged unchanged into the basal receiver agar block, judging by chromatography. This lends support to the hypothesis that polar movement is a property of several classes of plant hormones, rather than being restricted to the auxins (as previously believed).

1 This research was supported by National Science Foundation grants to W.P.J. and by facilities made available to the Department of Biology by the Whitehall and John A. Hartford Foundations.

2 Dedicated to the memory of Solon A. Gordon, an esteemed colleague and beloved friend.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1974 by the American Society of Plant Biologists