Article
Tobacco mutants with a decreased number of functional nia genes compensate by modifying the diurnal regulation of transcription, post-translational modification and turnover of nitrate reductase.
Planta - 1 Jan 1997
Scheible W R, González-Fontes A, Morcuende R, Lauerer M, Geiger M, Glaab J, Gojon A, Schulze E D, Stitt M
Abstract excerpt
Although nitrate reductase (NR. EC 1.6.6.1) is thought to control the rate of nitrate assimilation, mutants with 40-45% of wildtype (WT) NR activity (NRA) grow as fast as the WT. We have investigated how tobacco (Nicotiana tabacum L. cv. Gatersleben) mutants with one or two instead of four functional nia genes compensate. (i) The nia transcript was higher in the leaves of the mutants. However, the diurnal rhythm...
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