The Effect of Different Iron and Manganese Nutrient Levels on the Catalase and Cytochrome Oxidase Activities of Green and Albino Sunflower Leaf Tissues.

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Abstract
Effects of different Fe and Mn nutrient levels on soluble, insoluble, and total tissue contents of Fe and Mn, on protein N content, and on catalase and cytochrome oxidase activities of leaf tissues were studied in solution culture. Grafted green and albino sunflower plants were used. Low Fe and high Mn treatments induced symptoms of Fe deficiency chlorosis, and resulted in low water-soluble Fe content and low protein N content of green leaf tissues. The same nutrient treatments induced low catalase and cytochrome oxidase activities in both green and albino leaf tissues. Catalase and cytochrome oxidase activities of albino tissues were usually lower than those of corresponding green tissues grown with the same nutrient treatment.