TY - JOUR
T1 - Effects of salinity on anatomical features and physiology of a semi-mangrove plant Myoporum bontioides
AU - Xu, H. M.
AU - Tam, N. F.Y.
AU - Zan, Q. J.
AU - Bai, M.
AU - Shin, P. K.S.
AU - Vrijmoed, L. L.P.
AU - Cheung, S. G.
AU - Liao, W. B.
N1 - Funding Information:
This work was partially funded by the public science and technology research funds projects of ocean ( 200905009-4 ), and the monitoring funds of Mangrove in Neilingding-Futian National Nature Reserve of Guangdong ( 33000-4206874 ), and Doctoral Station foundation project of the Ministry of Education (20110171110032). We are deeply grateful to Prof. Wu Hong of the South China Agricultural University for his good support. We also thank Yanqun Li, Yang Y, and Huanxiang Deng for their help with the Paraffin and Semi-thin section technology.
PY - 2014/8/30
Y1 - 2014/8/30
N2 - 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.
AB - 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.
KW - Anatomical features
KW - Myoporum bontioides
KW - Physiological traits
KW - Salt adaptability
UR - http://www.scopus.com/inward/record.url?scp=84906272720&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2014.04.003
DO - 10.1016/j.marpolbul.2014.04.003
M3 - Article
C2 - 24768170
AN - SCOPUS:84906272720
SN - 0025-326X
VL - 85
SP - 738
EP - 746
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 2
ER -