Changes in morphological and anatomical structure of cabbage (Brassica oleracea) outer leaves and in ultrastructure of their chloroplasts caused by an in vitro excess of nickel
1997
Molas, J. (Agricultural Univ. of Lublin (Poland). Dept. of Plant Physiology)
Morphological, anatomical and ultrastructural changes, the quantity and quality of stomata, and the chlorophyll (Chl) content in primary outer leaves of cabbage plants cv . Slawa from Enkhouizen were examined. The plants were grown in agar with basic MS medium containing added nickel (as NiS04x7 H20) in concentrations of 0, 5, 10, and 20 g m-3 (Ni0, Ni5, Ni10, Ni20). Reduction of leaf blade area, of succulence and of leaf density, and growth of specific leaf area were noticed in plants treated with all concentrations of Ni. In Ni-treated plants the total number of stomata and open stomata decreased, and the number of defective stomata in both adaxial and abaxial side of leaves was higher. The volume of spongy and palisade mesophyll cells, was decreasing when the Ni concentration was increasing; the number of mesophyll cells on the same area of cross sections of leaves was increasing.
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