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Chemistry and Industry of Forest Products ›› 2020, Vol. 40 ›› Issue (1): 37-44.doi: 10.3969/j.issn.0253-2417.2020.01.006

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Monosaccharide Composition and Biological Activity of Polysaccharides from Pine Cones of Pinus pumila (Pall.) Regel

Zijiang LI1,2,Wei LIU1,Lei WU3,Dan WANG4,Chuanling SI1,*()   

  1. 1. Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
    2. Shandong Institute of Commerce and Technology, Jinan 250103, China
    3. Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang 330096, China
    4. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
  • Received:2019-08-03 Online:2020-02-28 Published:2020-03-06
  • Contact: Chuanling SI E-mail:sichli@tust.edu.cn
  • Supported by:
    江苏省生物质能源与材料重点实验室开放基金(JSBEM202007);天津市科技支撑计划重点项目(19YFZCSN00950);天津市企业科技特派员项目(19JCTPJC52800)

Abstract:

The pine cones of Pinus pumila (Pall.)Regel were extracted by ethanol. From the resulted residues, the polysaccharides of P.pumila cones (PPCP) were obtained by hot water extraction, spray drying and alcohol precipitation processes. The content of the polysaccharides was determined by phenol sulfuric acid method. The monosaccharide composition analysis of the polysaccharide conducted by gas chromatography revealed that it was a heteropolysaccharide and consisted of L-arabinose, D-mannose, D-glucose and D-galactose in the molar ratio of 2.33:1.00:2.20:1.94, which indicated typical IR characteristics of polysaccharides. The antioxidant activity of polysaccharides was evaluated by DPPH free radical (DPPH·) scavenging capacity, ABTS free radical (·ABTS+) scavenging capacity and reducing capacity. The results showed that pine cones polysaccharides of P.pumila exhibited significant scavenging effects on DPPH·, ·ABTS+ and strong reducing power in a concentration-dependent manner. The maximum scavenging rate of polysaccharides against DPPH·and·ABTS+ were 39.63% and 39.63%, and the maximum reducing capacity was 0.78 at the concentration of 2.0 g/L. In addition, polysaccharides of P.pumila cones could stimulate RAW 264.7 macrophages to produce a large amount of NO, but had no effect on cell proliferation.

Key words: Pinus pumila, pine cones polysaccharides, immunoregulatory activity, monosaccharide composition, antioxidant activity

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