Characterization of six putative photosystem I mutants in barley

Roger G. Hiller, Birger Lindberg Møller, Gunilla Høyer-Hansen

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Six putative photosystem I mutants in five different nuclear genes of barley have been characterized with respect to their photosynthetic electron transport capabilities, P700, cytochromes, chlorophyll-proteins and other thylakoid polypeptides. Three of these mutants (viridis-n 34, -zb 63, and -h 15) have normal photosystem II activities but are wholly or partly deficient in photosystem I electron transport, P700, chlorophyll, a-protein 1 and its apoprotein. These three mutants also lack low molecular weight polypeptides which are believed to be integral photosystem I iron-sulfur centres. Of the remaining mutants, xantha-q 75 and -q 76, which are allelic, are mainly depleted in photosystem II and the other (viridis-q 42) had aout 75% of the wild-type activity in both photosystems. The data are discussed in relation to the fluorescence induction kinetics and low temperature fluorescence emission spectra of the mutants.

Original languageEnglish
Pages (from-to)315-328
Number of pages14
JournalCarlsberg Research Communications
Volume45
Issue number4
DOIs
Publication statusPublished - Jul 1980
Externally publishedYes

Keywords

  • cytochromes
  • difference spectra
  • Fluorescence induction kinetics
  • P700
  • SDS-polyacrylamide gel electrophoresis
  • viridis-h
  • viridis-n
  • viridis-q
  • viridis-zb
  • xantha-q

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