Cd-induced system of defence in the garlic root meristematic cells

Studies on cadmium effects in the root meristematic cells of Allium sativum were carried out using electron microscopy in order to explain the possible mechanisms of garlic seedlings' tolerance to Cd stress. Seedlings were treated with 0.01, 0.10 and 1.00 mM CdCl2 solutions for 0.5, 1, 2, 4, 8,...

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Veröffentlicht in:	Biologia plantarum 2009-06, Vol.53 (2), p.369-372
Hauptverfasser:	Jiang, W.S.,Tianjin Normal Univ. (China). Library, Liu, D.H.,Tianjin Normal Univ. (China). Dept. of Biology, Xu, P.,Tianjin Normal Univ. (China). Dept. of Biology
Format:	Artikel
Sprache:	eng
Schlagworte:	ALLIUM SATIVUM Biomedical and Life Sciences Brief Communication CADMIO CADMIUM CELL MEMBRANES CELL WALLS CELLS CELLULE CELULAS CYTOPLASMIC ORGANELLES DAMAGE DANOS DEGAT DESINTOXICACION DETOXIFICATION DICTIOSOMA DICTYOSOME DICTYOSOMES FITOTOXICIDAD HEAVY METALS http://www.fao.org/aos/agrovoc#c_1178 http://www.fao.org/aos/agrovoc#c_1415 http://www.fao.org/aos/agrovoc#c_1418 http://www.fao.org/aos/agrovoc#c_2095 http://www.fao.org/aos/agrovoc#c_2219 http://www.fao.org/aos/agrovoc#c_2223 http://www.fao.org/aos/agrovoc#c_2258 http://www.fao.org/aos/agrovoc#c_26768 http://www.fao.org/aos/agrovoc#c_290 http://www.fao.org/aos/agrovoc#c_4754 http://www.fao.org/aos/agrovoc#c_4810 http://www.fao.org/aos/agrovoc#c_4869 http://www.fao.org/aos/agrovoc#c_5260 http://www.fao.org/aos/agrovoc#c_5848 http://www.fao.org/aos/agrovoc#c_6520 http://www.fao.org/aos/agrovoc#c_6651 http://www.fao.org/aos/agrovoc#c_7825 http://www.fao.org/aos/agrovoc#c_8045 http://www.fao.org/aos/agrovoc#c_9693 Life Sciences MEMBRANAS CELULARES MEMBRANE CELLULAIRE MERISTEMAS MERISTEME MERISTEMS METAL LOURD METALES PESADOS MICROSCOPIA MICROSCOPIE MICROSCOPY MITOCHONDRIA MITOCHONDRIE MITOCONDRIA NOYAU CELLULAIRE NUCLEO NUCLEUS ORGANITE CELLULAIRE ORGANULOS CITOPLASMICOS PARED CELULAR PAROI CELLULAIRE PHYTOTOXICITE PHYTOTOXICITY Plant Sciences RACINE RAICES RESISTANCE AUX FACTEURS NUISIBLES RESISTANCE TO INJURIOUS FACTORS RESISTENCIA A AGENTES DANINOS ROOTS SUBSTANCE TOXIQUE SUSTANCIAS TOXICAS TOXIC SUBSTANCES ULTAESTRUCTURA ULTRASTRUCTURE
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Zusammenfassung:	Studies on cadmium effects in the root meristematic cells of Allium sativum were carried out using electron microscopy in order to explain the possible mechanisms of garlic seedlings' tolerance to Cd stress. Seedlings were treated with 0.01, 0.10 and 1.00 mM CdCl2 solutions for 0.5, 1, 2, 4, 8, 10, 12, 24 and 48 h, respectively. The results indicated that cell walls, plasma membrane and main organelles actively participated in Cd detoxification and tolerance at low Cd concentrations. Once excessive Cd ions entered the cytosol, a defence mechanism becomes activated, protecting the cells against Cd toxicity. However, under high Cd concentration in cells, the cell structure was damaged, even leading to cells death.
ISSN:	0006-3134 1573-8264
DOI:	10.1007/s10535-009-0069-0