Aluminum toxicity studies in Vaucheria longicaulis var. macounii (Xanthophyta, Tribophyceae). II. Effects on the F-actin array

Environmental and Experimental Botany
L Alessa, L Oliveira

Abstract

In this study, we test the hypothesis that exposure to environmentally significant concentrations of aluminum (Al, 80 µM) causes the microfilament array of Vaucheria longicaulis var. macounii vegetative filaments to become fragmented and disorganized. Changes in F-actin organization following treatment of vegetative filaments by Al are examined using vital staining with fluorescein phalloidin. In the cortical cytoplasm of the apical zone of pH 7.5 and pH 4.5 control cells, axially aligned bundles of F-actin lead to a region of diffuse, brightly stained material. Dimly stained focal masses are noted deeper in the cytoplasm of the apical zone whereas they are absent from the zone of vacuolation. The F-actin array is visualized in the cortical cytoplasm of the region of the cell, distal to the apical tip, which exhibits vigorous cytoplasmic streaming (zone of vacuolation) as long, axially aligned bundles with which chloroplasts and mitochondria associate. Thirty minutes following treatment with aluminum, and for the next 8-16 h, the F-actin array is progressively disorganized. The longitudinally aligned F-actin array becomes fragmented. Aggregates of F-actin, such as short rods, amorphous and stellate F-actin focal masses, curved ...Continue Reading

References

Feb 1, 1989·Current Opinion in Cell Biology·J Vandekerckhove
Apr 1, 1994·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·S G Kaminskyj, I B Heath
Feb 1, 1995·Current Opinion in Cell Biology·R J Cyr, B A Palevitz
Jan 1, 1994·Archives of Toxicology·A HaugV Vitorello
Nov 1, 1996·Plant Physiology·D. D. FisherR. J. Cyr
Jul 1, 1995·Plant Physiology·S. Grabski, M. Schindler
Feb 1, 1989·The Plant Cell·D. L. KropfR. S. Quatrano
Feb 1, 1992·Plant Physiology·Z Rengel, D C Elliott
Mar 1, 1989·The New Phytologist·Martin W Steer, Jill M Steer
Nov 1, 1994·The New Phytologist·Diedrik Menzel

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