Cite this paper:
LIU Song, LI Bing, CHEN Xiaolin, QIN Yukun, LI Pengcheng. Effect of polysaccharide from Enteromorpha prolifera on maize seedlings under NaCl stress[J]. HaiyangYuHuZhao, 2019, 37(4): 1372-1381

Effect of polysaccharide from Enteromorpha prolifera on maize seedlings under NaCl stress

LIU Song1,2,3, LI Bing4, CHEN Xiaolin1,2,3, QIN Yukun1,2,3, LI Pengcheng1,2,3
1 CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China;
3 Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266000, China;
4 Marine Science and Engineering College, Qingdao Agriculture University, Qingdao 266000, China
In this study, a polysaccharide from Enteromorpha prolifera (EP) was extracted and its effect on maize seedlings under NaCl stress was investigated. Firstly, the components and structure of the EP were determined. We found that EP is a sulfated polysaccharide of high-molecular weight (Mw, 1 840 KDa) heteropolysaccharides and the main monosaccharide is rhamnose. The polysaccharide was applied to explore its effect on the growth of maize seedlings and its defense response under a salt stress. The results show that EP could promote the growth of maize seedlings under the salt stress. In addition, EP was shown able to significantly regulate membrane permeability and adjustment of osmotic substances such as soluble protein, soluble sugar, and proline, antioxidant enzymes containing superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase. Therefore, EP is an effective salt-resistant substance for the growth of maize seedlings under NaCl stress.
Key words:    polysaccharides|Enteromorpha prolifera|maize seedling|NaCl stress   
Received: 2018-05-18   Revised: 2018-08-22
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