momto2 Posted October 28, 2012 Share Posted October 28, 2012 (edited) Why doesn't cork cell show nucleus when stained with iodine? I am thinking because it is all dead cell. Please correct me if I am wrong. Edited October 28, 2012 by momto2 Quote Link to comment Share on other sites More sharing options...
NittanyJen Posted October 28, 2012 Share Posted October 28, 2012 Cork is not really a cell the way we normally think of it. Woody plants are surrounded by bark, which is where the Cork comes from. Cork is filled with a waxy, waterproof stuff called suberin, rather than cytoplasm, so organelles cannot operate; any organelles formerly in place will have long since disintegrated, hence no nucleus or anything other than cell walls (and cork's water resistant properties). In other light microscope work, remember there will be a practical limit of the wavelength of visible light-- anything smaller will not be visible. With some structures, it might be a matter of dye uptake. If you stain an onion slice, the nuclei should be nice and bright. Quote Link to comment Share on other sites More sharing options...
momto2 Posted October 28, 2012 Author Share Posted October 28, 2012 Thank you so much. We stained the onion cells and saw the nucleus. Then we did the same for cork cell and got a bit confused why there was no nucleus. Now we know. Thanks again. Quote Link to comment Share on other sites More sharing options...
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