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

doi:10.1007/s10863-012-9444-1

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 journal › Article › peer-review

30 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 Q_B reducing side heterogeneity and a reversible change in antenna heterogeneity. The number of Q_B 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 Q_B 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 language	English
Pages (from-to)	411-419
Number of pages	9
Journal	Journal of Bioenergetics and Biomembranes
Volume	44
Issue number	4
DOIs	https://doi.org/10.1007/s10863-012-9444-1
Publication status	Published - Aug 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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10.1007/s10863-012-9444-1

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

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 PSII{\ss} and γ centres.",

keywords = "Heterogeneity, High salt, Ionic stress, Photosystem II, Smotic stress, Wheat (Triticum aestivum)",

author = "Rupal Singh-Tomar and Sonal Mathur and Allakhverdiev, {Suleyman I.} and Anjana Jajoo",

note = "Funding Information: Acknowledgments AJ thanks Department of Science and Technology (DST) for the Project (INT/RFBR/P-98). SM thanks Council of Scientific and Industrial Research (CSIR), India for the Senior Research Fellowship [09/301/ (0119)/2010/EMR-I]. This work was also supported by grants from the Russian Foundation for Basic Research (Nos. 11-04-01389a and 11-04-92690a), the Russian Ministry of Science and Education (No. 2010–1.2.1.-102-022-033; 16.740.11.0176), and the Molecular and Cell Biology Programs of the Russian Academy of Sciences.",

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AU - Jajoo, Anjana

N1 - Funding Information: Acknowledgments AJ thanks Department of Science and Technology (DST) for the Project (INT/RFBR/P-98). SM thanks Council of Scientific and Industrial Research (CSIR), India for the Senior Research Fellowship [09/301/ (0119)/2010/EMR-I]. This work was also supported by grants from the Russian Foundation for Basic Research (Nos. 11-04-01389a and 11-04-92690a), the Russian Ministry of Science and Education (No. 2010–1.2.1.-102-022-033; 16.740.11.0176), and the Molecular and Cell Biology Programs of the Russian Academy of Sciences.

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N2 - 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.

AB - 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.

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KW - Photosystem II

KW - Smotic stress

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

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