Abstract
WE have reported that air ions of either charge accelerate the development of iron chlorosis in barley seedlings (Hordeum vulgaris var. California ‘Mariout’) cultivated in an iron-free nutrient solution1–3. During the course of experiments undertaken to explore the mechanisms involved in this phenomenon, we observed that the addition of iron in the form of iron–potassium–ethylene-tetraacetate (Fe-EDTA) to cell-free extracts prepared from barley seedlings which had developed chlorosis as the result of growth in an iron-free culture medium in a normal atmosphere produced a marked increase in the catalase activity of the extracts. The results presented here indicate that the pattern of increase in catalase activity is related to the extent of chlorosis.
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References
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KOTAKA, S., KRUEGER, A. & ANDRIESE, P. Catalase Activity of a Crude Enzyme Preparation from Iron-chlorotic Barley (Hordeum vulgaris) Seedlings. Nature 204, 1198–1199 (1964). https://doi.org/10.1038/2041198a0
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DOI: https://doi.org/10.1038/2041198a0
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