Effect of Iron Supply on Growth, Chlorophyll, Tissue Iron and Activity of Certain Enzymes in Maize and Radish

Iron is a constitulenit of the hemiie of catalase, cvtochroniie oxidase and peroxidase and( iron deficiency is kinow-n to del)ress iron l)orphyriln enzymlies ( 1. 3. 9. 14, 22, 27. 35). There is hardly any informiiationi onl the effect of iron supply on enzymes for which iron is not a cofactor. The work presented here was primarily carried out to investigate the effect of graded levels of iron supply, ranging from acute deficienicy to excess, on nonheme enzymes, starch phosphorvlase. fructose-1,6-diP aldolase, acid phosphatase, transaminase and ribonuc'ease, in addition to that onl the hematin enzymes catalase and peroxidase. Investigation was also carried out to find out whether additional iron supply would restore chlorophyll and enzyme concentratioin in iron deficient plants to the levels found in plants receiving normal iron supply.