Abstract
Nitrate reductase (EC 1.6.6.1) activity declined rapidly in leaves of wheat seedlings following polyethylene glycol-induced water stress. The decrease in NADH-nitrate reductase was accompanied by a concomitant loss of FMNH2- and reduced benzyl viologen-linked nitrate reductase activities. Incubation of dialysed leaf extracts with potassium ferricyanide restored the enzyme activity almost to the same level as that in non-stressed plants. The decline in nitrate reductase, at least during the initial stages of water stress, hence seems to be primarily due to redox-mediated inactivation rather than diminished synthesis of the enzyme.
Original language | English (US) |
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Pages (from-to) | 577-579 |
Number of pages | 3 |
Journal | Journal of Plant Physiology |
Volume | 152 |
Issue number | 4-5 |
DOIs | |
State | Published - 1998 |
Externally published | Yes |
Keywords
- In vitro nitrate reductase activation
- Triticum aestivum
- Water stress
ASJC Scopus subject areas
- Physiology
- Agronomy and Crop Science
- Plant Science