Abstract
Glucose-6-phosphate and NADP+ as well as malic acid and NADP<sup>+</sup> present in the incubation mixture enhanced nitrite reductase (EC 1.6.6.4) activity in <em>Pisum arvense</em> roots. This was manifested by a depression of the nitrite level in the tissues and an increased reduction of nitrites by plastids isolated from <em>P. arvense</em> roots. A marked stimulation of plastid malate dehydrogenase was also observed under the influence of nitrates present in the medium. These results suggest that pyridin nucleotides utilised by NiR during nitrite reduction may be formed not only in processes of glucose-6-phosphate oxidation in the pentosephosphate cycle, but also of malic acid by NADP<sup>+</sup>-dependent malate dehydrogenase.
Highlights
Summary
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
