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Effects of salinity on anatomical features and physiology of a semi-mangrove plant Myoporum bontioides.

Authors :
Xu HM
Tam NF
Zan QJ
Bai M
Shin PK
Vrijmoed LL
Cheung SG
Liao WB
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.)

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