期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 74, 期 7, 页码 2050-2056出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2011.07.013
关键词
Ionic toxicity; Salt stress; Gene expression; Antioxidant enzymes; Perennial ryegrass
资金
- The Chinese Academy of Sciences [KSCX2-YW-N-068]
- Special Fund for Public Welfare Industrial (Agriculture) Research of China [200903001]
Two-month old seedlings of perennial ryegrass (Lolium perenne L.) were subjected to four different levels of salinity for 7 days. The NaCl treatments reduced turf quality and normalized transpiration rates. Both chlorophyll (Chl) a and Chl b contents decreased in the grass exposed to 255 mM relative to the control. An increase in the lipid peroxidationin was observed. The activity of leaf superoxide dismutase increased while, peroxidase and catalase activities decreased in response to NaCl treatments. The expression of Chl Cu/ZnSOD, Cyt Cu/ZnSOD, FeSOD, CAT, POD, GPX and GR was up-regulated for NaCl-treated grass. Salt stress increased accumulation of Na+ and decreased K+/Na+ ratio, Mg2+ and P content in both shoots and roots of perennial ryegrass. The findings of this study suggest that salt stress may cause toxicity to perennial ryegrass through oxidative injury and damage to Chl and cell membrane integrity. (C) 2011 Elsevier Inc. All rights reserved.
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