Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum

Popova OV, Ismailov SF, Popova TN, Dietz K-J, Golldack D (2002)
PLANTA 215(6): 906-913.

Zeitschriftenaufsatz | Veröffentlicht| Englisch
 
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Autor/in
Popova, OV; Ismailov, SF; Popova, TN; Dietz, Karl-JosefUniBi; Golldack, DortjeUniBi
Abstract / Bemerkung
NADP-specific isocitrate dehydrogenase is a key cytosolic enzyme that links C and N metabolism by supplying C skeletons for primary N assimilation in plants. We report the characterization of the transcript Mc-ICDH1 encoding an NADP-dependent isocitrate dehydrogenase (NADP-ICDH, EC 1.1.1.42) from the facultative halophyte Mesembryanthemum crystallinum L., focussing on salt-dependent regulation of the enzyme. The activity of NADP-ICDH in plants adapted to high salinity increased in leaves and decreased in roots. By transcript analyses and Western-type hybridizations, expression of Mc-ICDH1 was found to be stimulated in leaves in salt-adapted M. crystallinum. By immunocytological analyses, NADP-ICDH proteins were localized to most cell types with strongest expression in epidermal cells and in the vascular tissue. In leaves of salt-adapted plants, signal intensities increased in mesophyll cells. In contrast to Mc-ICDH1, the activity and transcript abundance of ferredoxin-dependent glutamate synthase (Fd-GOGAT, EC 1.4.7.1), which is the key enzyme of N assimilation and biosynthesis of amino acids, decreased in leaves in response to salt stress. The physiological roles of NADP-ICDH and Fd-GOGAT in the adaptation of plants to high salinity are discussed.
Stichworte
salt stress; expression; proline accumulation; isocitrate dehydrogenase; ferredoxin-dependent glutamate synthase; tissue-specific; Mesembryanthemum
Erscheinungsjahr
2002
Zeitschriftentitel
PLANTA
Band
215
Ausgabe
6
Seite(n)
906-913
ISSN
0032-0935
eISSN
1432-2048
Page URI
https://pub.uni-bielefeld.de/record/1613251

Zitieren

Popova OV, Ismailov SF, Popova TN, Dietz K-J, Golldack D. Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum. PLANTA. 2002;215(6):906-913.
Popova, O. V., Ismailov, S. F., Popova, T. N., Dietz, K. - J., & Golldack, D. (2002). Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum. PLANTA, 215(6), 906-913. doi:10.1007/s00425-002-0827-0
Popova, O. V., Ismailov, S. F., Popova, T. N., Dietz, K. - J., and Golldack, D. (2002). Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum. PLANTA 215, 906-913.
Popova, O.V., et al., 2002. Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum. PLANTA, 215(6), p 906-913.
O.V. Popova, et al., “Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum”, PLANTA, vol. 215, 2002, pp. 906-913.
Popova, O.V., Ismailov, S.F., Popova, T.N., Dietz, K.-J., Golldack, D.: Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum. PLANTA. 215, 906-913 (2002).
Popova, OV, Ismailov, SF, Popova, TN, Dietz, Karl-Josef, and Golldack, Dortje. “Salt-induced expression of NADP-dependent isocitrate dehydrogenase and ferredoxin-dependent glutamate synthase in Mesembryanthemum crystallinum”. PLANTA 215.6 (2002): 906-913.

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