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2012 | 34 | 5 |

Tytuł artykułu

Expression pattern of the psbO gene and its involvement in acclimation of the photosynthetic apparatus during abiotic stresses in Festuca arundinacea and F. pratensis

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Języki publikacji



PsbO, the manganese-stabilizing protein, plays a crucial role in oxygen-evolving complex functioning and stabilization, by maintaining optimal manganese, calcium and chloride concentrations at the active state of PSII. In this paper we present a study focused on recognizing the relationship between psbO gene activity and acclimation of the photosynthetic apparatus under abiotic stresses in the grasses Festuca arundinacea and F. pratensis. PsbO expression was compared between two distinct genotypes within each species which differed in their levels of stress tolerance (drought and frost, respectively) during drought treatment (F. arundinacea) and cold acclimation (F. pratensis). The research involved: (1) the analyses of psbO gene expression profiles using real-time PCR, and (2) the analyses of PsbO protein accumulation profiles using protein gel blot hybridization. The results indicate that PsbO plays a protective function with respect to the photosynthetic apparatus during abiotic stresses. In cold-treated F. pratensis plants the accumulation of PsbO seems to be responsible for differences in the PSII photochemical efficiency. Higher stability of PSII during drought, observed in the high-drought tolerant F. arundinacea genotype, is not associated with PsbO accumulation, although the degradation of this protein affects destabilization of the oxygen-evolving complex in drought.

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Opis fizyczny



  • Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479 Poznan, Poland
  • Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479 Poznan, Poland
  • Department of Plant Physiology, University of Agriculture in Krakow, Podluzna 3, 30-239 Krakow, Poland


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