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| Physiological Difference in Messerschmidia sibirica Grown in Inland and Coastal Sand Land in Nature Environment and under Sand Burial |
| Xie Weihai1, Zhou Ruilian1, Liang Huimin2, Qu Hao3, Dong Longwei1, Qiang Shengbin1 |
1. School of Life Science, Ludong University, Yantai 264025, Shandong, China;
2. The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Jiangsu AgricuLture and Forestry Profession Technology College, Jurong 212400, Jiangsu, China;
3. Cold and Arid Regions Environmentaland Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract Messerschmidia sibirica is a ground cover plant with higher resistance to salt, drought and sand-fixation, and is a dominant plant in coastal sand land(CSL) and also grow in inland sand land(ISL). In this paper, M.sibirica grown in Horqin Sandy Land(ISL) and coastal sand land in Yantai were used as material. The soil chemical properties and temperature and water content in both two sand lands, and malondialdehyde(MDA) content, the activities of antioxidative enzyme and osmoregulation substance contents in leaves of M.sibirica were measured in nature environment(NE) and under sand burial(SB). The results showed that:(1) The soil in CSL had higher in Na+ content by 5 times than that of ISL, but had lower surface temperature than ISL.(2)The leaves of M.sibirica from both sand lands kept lower MDA content in NE and under SB.(3)The leaves of M.sibirica grown in ISL with drought and higher temperature had higher contents in proline and soluble sugar than that of CSL in NE and under SB. For instance, in NE, the contents of proline and soluble sugar in leaves of M.sibirica from ISL were higher by 25%-50%, and 3.5 times than that from CSL.(4)The leaves of M.sibirica grown in CSL had higher activities of superoxide dismutase(SOD), peroxidase(POD), catalase(CAT) than that of ISL in NE and under SB for 5 days and 10 days, for instance, in NE, it had higher in the activities of SOD, POD, CAT by 14%, 140% and 118% than that from ISL.(4)Both M.sibirica grown in ISL and CSL had same response to SB. The content of proline and activities of SOD and CAT increased, and content of soluble sugar decreased in the leaves above sand with increasing of sand burial depth. It suggest that M.sibirica had a higher ability of physiological regulation by changing osmotic regulator in maintaining water metabolism balance, and increasing activities of antioxidative enzyme to inhibition of lipid peroxidation, which would be foundation of physiological plasticity for it to have a wider ecological amplitude.
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Received: 01 May 2015
Published: 20 November 2015
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2015, Vol. 35 
