Respiration of Leaves of Barley Infected with Powdery Mildew: Increased Engagement of the Alternative Oxidase

J. F. FARRAR, Francis Rayns

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Leaves of barley cv. Maris Otter, susceptible to powdery mildew, show a large increase in respiration rate when infected with this fungus. About half of the increase is due to increased electron flow through the cytochrome chain and half through the alternative pathway. The alternative pathway shows increased engagement following infection but no increase in capacity. Respiration is not limited either by substrate or supply of inorganic phosphate. While the increase in activity of the cytochrome path may be due to adenylate regulation, that of the alternative path is not understood. The more resistant cvs Athos and Atem do not show alternative path activity following infection with mildew.

Original languageEnglish
Pages (from-to)119-125
Number of pages7
JournalNew Phytologist
Volume107
Issue number1
DOIs
Publication statusPublished - Sep 1987
Externally publishedYes

Keywords

  • alternative oxidase
  • barley
  • cytochrome
  • Powdery mildew (Erysiphe graminis hordei)
  • respiration

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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