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Plant Physiology 59:178-180 (1977)
© 1977 American Society of Plant Biologists

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Articles

Mechanism of Cyanide Inhibition of Phloem Translocation 1

Robert Giaquintaa,2

Donald R. Geigerb

a Department of Central Research and Development, Experimental Station, E. I. du Pont de Nemours & Co., Wilmington, Delaware 19898, Department of Biology, University of Dayton, Dayton, Ohio 45469

Petiolar application of potassium cyanide inhibited 14C-assimilate translocation without affecting source leaf photosynthesis or phloem loading of sucrose in Phaseolus vulgaris. The inhibition of transport was correlated with disruption of the structural integrity of the sieve tubes (sieve pore blockage) rather than impairment of a metabolic process in the translocation path driving translocation.

2 To whom reprint requests should be sent.

1 This work was submitted in partial fulfillment for the Ph.D. degree at the University of Dayton, Dayton, Ohio, 1972.






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Copyright © 1977 by the American Society of Plant Biologists