TY - JOUR T1 - Chloroplast ultrastructure and thylakoid polypeptide composition are affected by different salt concentrations in the halophytic plant Arthrocnemum macrostachyum. AU - Trotta,Andrea, AU - Redondo-Gómez,Susana, AU - Pagliano,Cristina, AU - Clemente,Manuel Enrique Figueroa, AU - Rascio,Nicoletta, AU - La Rocca,Nicoletta, AU - Antonacci,Alessia, AU - Andreucci,Flora, AU - Barbato,Roberto, Y1 - 2011/11/26/ PY - 2011/07/25/received PY - 2011/11/02/revised PY - 2011/11/03/accepted PY - 2011/11/29/entrez PY - 2011/11/29/pubmed PY - 2012/6/9/medline SP - 111 EP - 6 JF - Journal of plant physiology JO - J Plant Physiol VL - 169 IS - 2 N2 - 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. SN - 1618-1328 UR - https://www.unboundmedicine.com/medline/citation/22118876/Chloroplast_ultrastructure_and_thylakoid_polypeptide_composition_are_affected_by_different_salt_concentrations_in_the_halophytic_plant_Arthrocnemum_macrostachyum_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0176-1617(11)00450-0 DB - PRIME DP - Unbound Medicine ER -