Aquaporin-deficient mutant of Synechocystis is sensitive to salt and high-light stress

Maria A. Sinetova, Kirill S. Mironov, Laszlo Mustardy, Alexey Shapiguzov, Dmitry Bachin, Suleyman I. Allakhverdiev, Dmitry A. Los

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Cyanobacterial aquaporins play an important role in the regulation of various physiological functions: cell volume control, osmotic stress responses, gas exchange. We employed the AqpZ-deficient mutant of Synechocystis to study the role of aquaporins in responses to salt (NaCl) and high light stress. Electron microscopy and paramagnetic resonance revealed that AqpZ-deficient cells are unable to efficiently regulate the cytoplasmic volume under salt stress. Both photosystems (PSII and, especially, PSI) of these cells are more sensitive to NaCl and to high light. Thus, AqpZ of Synechocystis participates in regulation of the photosynthetic activity of PSI and PSII under salt and high-light stress. Our results demonstrate that AqpZ might be necessary for the repair of PSII and PSI after photodamage.

Original languageEnglish
Pages (from-to)377-382
Number of pages6
JournalJournal of Photochemistry and Photobiology B: Biology
Volume152
DOIs
Publication statusPublished - Nov 1 2015

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Keywords

  • Aquaporin
  • Cyanobacteria
  • High-light stress
  • Photosynthesis
  • Salt stress
  • Synechocystis

ASJC Scopus subject areas

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

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