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Salinity can interfere with nitrogen nutrition in a direct and indirect way, usually simultaneously at several points of the assimilation pathway of the inorganic nitrogen compounds. Dependent on the plant species, there are many similarities between general osmotic stress and salt stress, even drought, but uptake of chloride can, in the case of salinity, even alleviate the mere osmotic effects. Nitrate...
Abstract. Purified plasma membranes (PMs) of tobacco (Nicotiana tabacum L. cv. Samsun) roots exhibited a nitrite-reducing enzyme activity that resulted in nitric oxide (NO) formation. This enzyme activity was not detected in soluble protein fractions or in PM vesicles of leaves. At the pH optimum of pH6.0, nitrite was reduced to NO with reduced cytochrome c as electron donor at a rate comparable to...
. Plasma-membrane-bound nitrate reductase (PM-NR) is located in roots and leaves of tobacco (Nicotiana tabacum L. cv. Samsun) and reduces nitrate with NADH as electron donor. When plasma membranes were prepared under specific protecting conditions, a PM-NR of roots was detected that accepts electrons from succinate to reduce nitrate. Comparison between the succinate dehydrogenase of mitochondria and...
Abstract. Plasma-membrane-bound nitrate reductase (PM-NR) is located in roots and leaves of tobacco (Nicotiana tabacum L. cv. Samsun) and reduces nitrate with NADH as electron donor. When plasma membranes were prepared under specific protecting conditions, a PM-NR of roots was detected that accepts electrons from succinate to reduce nitrate. Comparison between the succinate dehydrogenase of mitochondria...
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