Distribution of Iron, Chlorophyll, and Heme Enzymes in the Life Span of Groundnut

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Abstract
The distribution of iron and chlorophyll and the activities of the heme enzymes cytochrome oxidase, catalase, and peroxidase were found to be uneven in basal, middle, and apical leaves studied at three different growth phases (vegetative growth and flowering; development of pegs and pods; mature phase associated with yellowing and senescence of basal leaves) in the life span of groundnut (peanut) var. TMV-2 plants grown under natural conditions. The maximum amount of chlorophyll and maximum activity of the three iron-porphyrin enzymes in the leaves were associated with the phase of development of pegs and pods. At all three growth phases the leaves on the middle portion of the stem accumulated relatively more iron, contained a higher chlorophyll content, and showed greater activity of the three heme enzymes than did the basal and apical leaves.

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