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Effects of salinity on anatomical features and physiology of a semi-mangrove plant Myoporum bontioides.
- Source :
-
Marine pollution bulletin [Mar Pollut Bull] 2014 Aug 30; Vol. 85 (2), pp. 738-46. Date of Electronic Publication: 2014 Apr 24. - Publication Year :
- 2014
-
Abstract
- The effect of different concentrations of NaCl, 0, 100, 200, 300 and 400 mM, on the anatomical features and physiology of Myoporum bontioides was investigated. The photosynthetic rates (Pn) were significantly reduced by salt stress, with the lowest values at 400 mM NaCl. The content of malondialdehyde (MDA), proline and soluble sugar, as well as the activities of peroxidase (POD) and catalase (CAT) increased at the beginning, but became similar to the control as the experiment proceeded. The NaCl effect on superoxide dismutase (SOD) was different from the other parameters, with a significant reduction at 400 mM NaCl at Day 7. Salt glands were found in both upper and lower epidermis, and the ratios of the thickness of palisade to spongy mesophyll tissues increased with NaCl concentrations. The medullary ray was clearly damaged by NaCl at levels of 200 and 300 mM. These results demonstrated that M. bontioides could adapt to a relatively low salinity, and was not a halophilous species.<br /> (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Subjects :
- Catalase metabolism
China
Estuaries
Fresh Water
Malondialdehyde chemistry
Myoporum anatomy & histology
Osmosis drug effects
Peroxidase metabolism
Photosynthesis drug effects
Plant Stems drug effects
Proline chemistry
Salinity
Superoxide Dismutase metabolism
Antioxidants analysis
Myoporum physiology
Plant Leaves drug effects
Sodium Chloride chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1879-3363
- Volume :
- 85
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Marine pollution bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 24768170
- Full Text :
- https://doi.org/10.1016/j.marpolbul.2014.04.003