▪ Abstract Nitrate reductase (NR; EC 1.6. 6.1-3) catalyzes NAD (P) H reduction of nitrate to
nitrite. NR serves plants, algae, and fungi as a central point for integration of metabolism by …

Recently nitric oxide (NO) has emerged as a key signalling molecule in plants. Here we
review the potential sources of endogenous NO, outline the biological processes likely to be …

The nitrate assimilatory pathway has been the matter of intensive genetic and molecular
analysis over the past decade. Mutants impaired in the expression of nitrate reductase have …

The ability to use nitrate as sole nitrogen source to sustain growth is a property shared by
some bacteria and fungi and by most algae and plants. The biochemical pathway …

The transition element molybdenum is essential for (nearly) all organisms and occurs in
more than 30 enzymes catalyzing diverse redox reactions; however, only three Mo-enzymes …

In order to study the regulation of NO 3 su− absorption, experiments were performed with
Brassica napus plants submitted to a localized supply of NO 3 su− by means of a split root …

Transformed Nicotiana plumbaginlfolla plants, con stitutively expressing a chimaerlc nitrate
reductase gene (nia2 gene transcript fused to the constitutive CaMV 35S promoter), were …

Background In the biological assimilation of nitrate in plants and microorganisms, nitrate is
reduced to ammonium by transfer of eight electrons in a two-step process. The first step of …

The refined crystal structures of the recombinant cytochromebreductase fragment of corn
(Zea mays) nitrate reductase, its ADP complex and the active-site mutant Cys242Ser are …

Evolving from a germinating seedling, dependent on a stored restricted energy supply, into
an active photosynthetic plant capturing the energy from sunlight is obviously a vulnerable …