Responses of the Ascorbate-Glutathione Cycle to Necrotic Virus Infections in Tobacco

G. Gullner, J. Fodor, A. Józsa, R. Gáborjányi, Z. Király

Research output: Contribution to journalArticle

3 Citations (Scopus)


Malondialdehyde (MDA) levels, and activities of ascorbate peroxidase (AP), dehydroascorbate reductase (DHAR), and glutathione reductase (GR) were determined in Nicotiana tabacum L. cv. Xanthi-nc infected by tobacco mosaic virus (TMV) and in Nicotiana benthamiana L. infected with tobacco necrosis virus. TMV infections led to considerably increased MDA levels in N. tabacum leaf tissues incubated under light, but less noticeably in darkness. In virus infected leaves AP activities increased substantially, while DHAR activities decreased in both plant-virus interactions. In TMV infected N. tabacum leaves elevated GR activities were also observed. It is supposed that antioxidative reactions influence necrotization and thereby symptom expression in virus infected tobacco plants.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalPhyton - Annales Rei Botanicae
Issue number3
Publication statusPublished - Jan 7 1997


  • Ascorbate peroxidase
  • Dehydroascorbate reductase
  • Glutathione reductase
  • Lipid peroxidation
  • Malondialdehyde

ASJC Scopus subject areas

  • Global and Planetary Change
  • Physiology
  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

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