Analysis of salt stress induced changes in Photosystem II heterogeneity by prompt fluorescence and delayed fluorescence in wheat (Triticum aestivum) leaves

Pooja Mehta, Vladimir Kreslavsky, Sudhakar Bharti, Suleyman I. Allakhverdiev, Anjana Jajoo

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

In order to investigate changes in the heterogeneity of PSII, prompt fluorescence induction curves (PFIC) and delayed fluorescence induction curves (DFIC) were measured in wheat leaves after salt treatment. From these data, antenna heterogeneity and reducing side heterogeneity were estimated. Results show that antenna size, which is further differentiated into α, β and γ PSII centers, is changed under salt stress conditions. At higher salt concentration, there is a decrease in the number of α PSII centers with simultaneous increase in the amount of β and γ PSII centers. Another aspect of antenna heterogeneity is explained in terms of connectivity (or grouping) between PSII centers which did not change significantly under salt stress. Reducing side heterogeneity was assessed by both DFIC and PFIC and results show that a significant increase in the conversion of Q B-reducing centers to QB-non-reducing centers is observed under salt stress.

Original languageEnglish
Pages (from-to)308-313
Number of pages6
JournalJournal of Photochemistry and Photobiology B: Biology
Volume104
Issue number1-2
DOIs
Publication statusPublished - Jul 1 2011

Keywords

  • Delayed fluorescence
  • Heterogeneity
  • Photosystem II
  • Prompt fluorescence
  • Salt stress
  • Wheat

ASJC Scopus subject areas

  • Radiation
  • Radiological and Ultrasound Technology
  • Biophysics
  • Radiology Nuclear Medicine and imaging

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