Summary
Pea plants (Pisum sativum L., var. Lincoln) were grown in nutrient cultures at 4 levels of iron, 0.60 ppm (low), 0.96 ppm (low), 3.0 ppm (normal) and 30 ppm (excess) for 45 days.
Leaf extracts were assayed for chlorophyll, proteins, catalase and peroxidase activities. Catalase and chlorophyll were closely related to iron supply. An inverse relationship was observed between peroxidase and catalase activities. Peroxidase was increased both at dificiency and excess iron levels, but was depressed at normal iron supply. The peroxidase/catalase ratio varied with iron supply and showed a minimum value of about 39 at 15 and 30 days growth, at adequate iron supplies.
Measurement of catalase activity and the use of peroxidase/catalase ratios appear to be helpful in identifying iron deficiencies in peas.
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Del Rio, L.A., Gomez, M., Yañez, J. et al. Iron deficiency in pea plants effect on catalase, peroxidase, chlorophyll and proteins of leaves. Plant Soil 49, 343–353 (1978). https://doi.org/10.1007/BF02149743
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DOI: https://doi.org/10.1007/BF02149743