Document Detail

Chloroplast ultrastructure and thylakoid polypeptide composition are affected by different salt concentrations in the halophytic plant Arthrocnemum macrostachyum.
MedLine Citation:
PMID:  22118876     Owner:  NLM     Status:  MEDLINE    
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.
Andrea Trotta; Susana Redondo-Gómez; Cristina Pagliano; Manuel Enrique Figueroa Clemente; Nicoletta Rascio; Nicoletta La Rocca; Alessia Antonacci; Flora Andreucci; Roberto Barbato
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-11-26
Journal Detail:
Title:  Journal of plant physiology     Volume:  169     ISSN:  1618-1328     ISO Abbreviation:  J. Plant Physiol.     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2011-12-26     Completed Date:  2012-06-08     Revised Date:  2014-10-03    
Medline Journal Info:
Nlm Unique ID:  9882059     Medline TA:  J Plant Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  111-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier GmbH. All rights reserved.
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MeSH Terms
Amaranthaceae / growth & development,  metabolism,  ultrastructure*
Chloroplasts / chemistry,  drug effects,  metabolism,  ultrastructure*
Cytochromes / metabolism
Membrane Proteins / metabolism*
Photosystem I Protein Complex / metabolism
Photosystem II Protein Complex / metabolism
Plant Growth Regulators / metabolism
Salt-Tolerant Plants / growth & development,  metabolism
Sodium Chloride / pharmacology*
Thylakoids / metabolism,  ultrastructure
Reg. No./Substance:
0/Cytochromes; 0/Membrane Proteins; 0/Photosystem I Protein Complex; 0/Photosystem II Protein Complex; 0/Plant Growth Regulators; 0/thylakoid polypeptides; 7647-14-5/Sodium Chloride

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