Ferricyanide restores nitrate reductase activity in leaf extracts of water stressed wheat seedlings

N. Munjal, S. K. Sawhney, V. Sawhney

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

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 languageEnglish (US)
Pages (from-to)577-579
Number of pages3
JournalJournal of Plant Physiology
Volume152
Issue number4-5
DOIs
StatePublished - 1998
Externally publishedYes

Keywords

  • In vitro nitrate reductase activation
  • Triticum aestivum
  • Water stress

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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