Comparative Studies on the Induction and Inactivation of Nitrate Reductase in Corn Roots and Leaves 1
AUTOR(ES)
Aslam, Muhammad
RESUMO
A comparison of induction and inactivation of nitrate reductase and two of its component activities, namely FMNH2-nitrate reductase and NO3−-induced NADH-cytochrome c reductase, was made in roots and leaves of corn (Zea mays L. var. W64A × 182E). The three activities were induced in parallel in both tissues when NO3− was supplied. WO4= suppressed the induction of NADH- and FMNH2-nitrate reductase activities in root tips and leaves. The NO3−-induced NADH-cytochrome c reductase activity showed a normal increase in roots treated with WO4=. In leaves, on the other hand, there was a marked superinduction of the NO3−-induced NADH-cytochrome c reductase in the presence of WO4=.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=542075Documentos Relacionados
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