Journal
ENVIRONMENTAL POLLUTION
Volume 179, Issue -, Pages 68-74Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.03.061
Keywords
Vicia sativa L.; Seed; Copper; Protein mobilization; TEM
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The effects of different copper concentrations on percentage germination, increase in fresh weight and radicle growth of Vicia saliva L seeds were studied. Physiological studies showed that the germination rate was not affected up to a concentration of 5 x 10(-3) M, but already at 10(-3) M the copper stopped root elongation. Structural and ultrastructural observations of embryo and cotyledon reserve mobilization showed that inhibition of radicle growth at 10(-3) M Cu concentration cannot be ascribed to nutrient shortage but probably to an effect of copper on radicle cell division and elongation. In seeds treated with 5 x 10(-3) M CuBr2, the copper completely inhibited cotyledon protein mobilization, so that embryo protein mobilization supported normal growth of the radicle up to 30 h after imbibition. The particular protein content of adjacent cotyledon cells is also discussed. (C) 2013 Elsevier Ltd. All rights reserved.
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