Changes in PS II heterogeneity in response to osmotic and ionic stress in wheat leaves (Triticum aestivum)

Rupal Singh-Tomar, Sonal Mathur, Suleyman I. Allakhverdiev, Anjana Jajoo

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

High salt stress involves ionic stress as well as osmotic stress. In this work we have tried to differentiate between the ionic and osmotic effects of salt stress on the basis of their ability to cause changes in PS II heterogeneity. PS II heterogeneity is found to vary with environmental conditions. Osmotic stress caused no change in the QB reducing side heterogeneity and a reversible change in antenna heterogeneity. The number of QB non-reducing centers increased under ionic stress but were unaffected by osmotic stress. On the other hand ionic stress led to a partially irreversible change in QB reducing side heterogeneity and a reversible change in antenna heterogeneity. In response to both ionic and osmotic effect, there is conversion of active PS IIα centres to inactive PSIIß and γ centres.

Original languageEnglish
Pages (from-to)411-419
Number of pages9
JournalJournal of Bioenergetics and Biomembranes
Volume44
Issue number4
DOIs
Publication statusPublished - Aug 1 2012

Keywords

  • Heterogeneity
  • High salt
  • Ionic stress
  • Photosystem II
  • Smotic stress
  • Wheat (Triticum aestivum)

ASJC Scopus subject areas

  • Physiology
  • Cell Biology

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