Nitrite reductase (NIR; EC 1.7.7.1) is a central enzyme in nitrate assimilation and is localized in plastids. The present study concerns the regulation of the appearance of NIR in cotyledons of the mustard (Sinapis alba L.) seedling. It was shown that light exerts its positive control over the nitra
Signal storage in phytochrome action on nitrate-mediated induction of nitrate and nitrite reductases in mustard seedling cotyledons
✍ Scribed by C. Schuster; R. Oelmüller; H. Mohr
- Publisher
- Springer-Verlag
- Year
- 1987
- Tongue
- English
- Weight
- 837 KB
- Volume
- 171
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
Application of nitrate leads to an induction of nitrate reductase (NR; EC 1.6.6.1) and nitrite reductase (NIR; EC 1.7.7.1) in the cotyledons Professor Wilhelm Nultsch mit guten Wiinschen zum 60. Geburtstag
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Nitrate-induced and phytochrome-modulated appearance of nitrate reductase (NR; EC 1.6.6.1) and nitrite reductase (NIR; EC 1.7.7.1) in the cotyledons of the mustard (Sinapis alba L.) seedling is strongly affected by externally supplied ammonium (NH2). In short-term experiments between 60 and 78 h aft
In mustard (Sinapis alba L.) cotyledons, NADH-dependent glutamate synthase (NADH-GOGAT, EC 1.4.1.14) is only detectable during early seedling development with a peak of enzyme activity occurring between 2 and 2.5 d after sowing. With the beginning of plastidogenesis at approximately 2 d after sowing
In etiolated leaves of Phaseolus vulgaris L. cv. Prelude only low levels of NADH-nitrate oxidoreductase (E.C. 1.6.6.2; NAR) and reduced benzyl viologen-nitrite oxidoreductase (E.C. 1.6.6.4; NIR) could be detected, even in the presence of nitrate. When nitrate was available illumination of leaves of
which is cytosolic, as if it were a plastidic protein. The appearance of NR3 depends on the plastidic factor in principally the same way as that of NR~ and NR2 whereas NR 4 is totally independent of the plastidic factor. The data document particular kinds of interaction between controlling factors