Chloroplast ultrastructure and thylakoid polypeptide composition are affected by different salt concentrations in the halophytic plant Arthrocnemum macrostachyum
| Autor: | Flora Andreucci, Nicoletta Rascio, Roberto Barbato, Alessia Antonacci, Nicoletta La Rocca, Cristina Pagliano, Manuel Enrique Figueroa Clemente, Susana Redondo-Gómez, Andrea Trotta |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
PSII
Thylakoids halophytes Chloroplasts Photosystem II Physiology macromolecular substances Plant Science Biology Sodium Chloride Photosystem I Plant Growth Regulators Halophyte polycyclic compounds Polyacrylamide gel electrophoresis Amaranthaceae Photosystem I Protein Complex food and beverages Membrane Proteins Photosystem II Protein Complex Salt-Tolerant Plants Chloroplast Biochemistry Spain Thylakoid Arthrocnemum macrostachyum Ultrastructure Cytochromes Agronomy and Crop Science |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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