The content of zinc and copper in coleoptiles of etiolated wheat (Triticum aestivum L.) seedlings was measured after seed germination. The content of these metals changed differently during coleoptile development and aging: the content of zinc increased substantially from the 8th to 14th day of seedling development, whereas the content of copper slightly increased on day 8 and later slightly decreased. These changes coincided with the period of increased proteolytic activity and the signs of coleoptile cell apoptotic death. Zinc accumulation and copper amount reduction in the aging coleoptile were most pronounced in the oldest apical segment of the coleoptile, which was most enriched in apoptotic cells. The modulations in the zinc and copper amounts observed might be related to the induction and continuation of terminal stages of apoptosis.
Russian Journal of Plant Physiology – Springer Journals
Published: Jul 7, 2006
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