Journal
JOURNAL OF ARID ENVIRONMENTS
Volume 58, Issue 4, Pages 463-481Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jaridenv.2003.12.003
Keywords
Plantago crassifolia; halophytes; seed germination; plant growth; osmolytes; proline; sorbitol; ion exchange HPLC
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General responses to salt stress have been investigated in the halophyte Plantago crassifolia. Seed germination was strongly inhibited by NaCl, although seed viability and germination capacity were not affected by salt pre-treatments. A concentration-dependent inhibition of plant growth was observed in the presence of NaCl, which was accompanied by the accumulation of Na+ ions in the leaves, as determined by cation exchange HPLC. A 20-fold increase of proline content in leaves was observed when plants were treated with 500 mm NaCl, suggesting a protective role against high salinity stress for this amino acid, whose possible mechanism of action is discussed. (C) 2003 Elsevier Ltd. All rights reserved.
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