This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Web of Science (25) Citing Articles via Google Scholar Google Scholar Articles by Peterson, C. A. Articles by Rauser, W. E. Search for Related Content PubMed PubMed Citation Articles by Peterson, C. A. Articles by Rauser, W. E. Agricola Articles by Peterson, C. A. Articles by Rauser, W. E.

Articles

Callose Deposition and Photoassimilate Export in Phaseolus vulgaris Exposed to Excess Cobalt, Nickel, and Zinc ¹

Wilfried E. Rauser^b

^a Department of Biology, University of Waterloo, Ontario N2L 3G1 Canada, Department of Botany and Genetics, University of Guelph, Ontario N1G 2W1 Canada

Callose accumulated on sieve plates of phloem of white bean seedlings exposed to excess Co, Ni, or Zn. The callose deposits ranged in thickness and were most pronounced in midribs of unifoliate leaves and their subtending petioles. Lesser callose deposits were found in stems. Although translocation of ¹⁴C was reduced drastically in seedlings exposed to excess metal, no correlation was found between translocated ¹⁴C and the amount of callose in the petioles. It is concluded that the inhibition of phloem translocation in seedlings exposed to excess metal is due to effects other than callose deposition.