A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Chloroplast ultrastructure and thylakoid polypeptide composition are affected by different salt concentrations in the halophytic plant Arthrocnemum macrostachyum
Tekijät: Andrea Trotta, Susana Redondo-Gómez, Cristina Pagliano, Manuel Enrique Figueroa Clemente, Nicoletta Rascio, Nicoletta La Rocca, Alessia Antonacci, Flora Andreucci, Roberto Barbato
Kustantaja: Elsevier
Julkaisuvuosi: 2012
Journal: Journal of Plant Physiology
Vuosikerta: 169
Numero: 2
Sivujen määrä: 6
ISSN: 0176-1617
DOI: https://doi.org/10.1016/j.jplph.2011.11.001
Verkko-osoite: http://www.sciencedirect.com/science/article/pii/S0176161711004500
The effect of different external salt concentrations, from 0 mM to 1030 mM NaCl, on photosynthetic complexes and chloroplast ultrastructure in the halophyte Arthrocnemum macrostachyum
was studied. Photosystem II, but not Photosystem I or cytochrome b6/f,
was affected by salt treatment. We found that the PsbQ protein was never
expressed, whereas the amounts of PsbP and PsbO were influenced by salt
in a complex way. Analyses of Photosystem II intrinsic proteins showed
an uneven degradation of subunits with a loss of about 50% of centres in
the 0 mM NaCl treated sample. Also the shape of chloroplasts, as well
as the organization of thylakoid membranes were affected by NaCl
concentration, with many grana containing few thylakoids at 1030 mM NaCl and thicker grana and numerous swollen thylakoids at 0 mM NaCl. The PsbQ protein was found to be depleted also in thylakoids from other halophytes.
