Journal of Bioenergetics and Biomembranes

, Volume 44, Issue 4, pp 411–419 | Cite as

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 JajooEmail author


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 PSIIβ and γ centres.


Heterogeneity High salt Ionic stress Osmotic stress Photosystem II Wheat (Triticum aestivum


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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Rupal Singh-Tomar
    • 1
  • Sonal Mathur
    • 1
  • Suleyman I. Allakhverdiev
    • 2
    • 3
  • Anjana Jajoo
    • 1
    Email author
  1. 1.School of Life ScienceDevi Ahilya UniversityIndoreIndia
  2. 2.Institute of Plant PhysiologyRussian Academy of SciencesMoscowRussia
  3. 3.Institute of Basic Biological ProblemsRussian Academy of SciencesPushchinoRussia

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