Abstract
Ferredoxin-dependent glutamate synthase (Fd-Gogat; EC 1.4.7.1) in leaf and root plastids is the last enzyme involved in the pathway of nitrate assimilation in higher plants. Arabidopsis thaliana expresses two different genes: the first, light regulated, specific of green tissues and the second expressed in other tissues. In this work, we investigated whether in our clone, OsGog2 AC Y12595, this gene is up-regulated by light or it is expressed under darkness. Fd-Gogat specific activity, protein and mRNA increased after light treatment in rice shoots. In roots, the activity and the protein content remained constant, whereas the mRNA is repressed by light treatment. The results obtained using a specific probe, situated in the 3′ untranslated region of the OsGog2 cDNA, indicated that OsGog2 gene is up-regulated by light and that its expression is tissue specific and suggested that a dark expressed Fd-Gogat gene could be present in rice similarly as in Arabidopsis.
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Abbreviations
- Fd:
-
ferredoxin
- GS:
-
glutamine synthetase
- Gogat:
-
glutamate synthase
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Mattana, M., Biazzi, E., Bertani, A. et al. Characterization of the Ferredoxin-Gogat gene (OsGog2 clone) expression in rice. Biol Plant 50, 187–192 (2006). https://doi.org/10.1007/s10535-006-0005-5
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DOI: https://doi.org/10.1007/s10535-006-0005-5