食品科学 ›› 2023, Vol. 44 ›› Issue (7): 123-131.doi: 10.7506/spkx1002-6630-20220310-122

• 食品工程 • 上一篇    

不同方法降解对鳞杯伞子实体多糖理化性质与活性的影响

郭蓉,常明昌,程艳芬,孟俊龙,冯翠萍,耿雪冉,徐丽婧,郭东东   

  1. (1.山西农业大学食品科学与工程学院,山西 太谷 030801;2.山西省食用菌工程技术研究中心,山西 太谷 030801;3.黄土高原食用菌山西省重点实验室,山西 太谷 030801)
  • 发布日期:2023-04-25
  • 基金资助:
    山西省基础研究计划(自由探索类)(20210302123384);山西省基础研究计划青年项目(20210302124071)

Effects of Different Degradation Methods on the Physicochemical Properties and Antioxidant Activity of Polysaccharides from Clitocybe squamulosa Fruiting Body

GUO Rong, CHANG Mingchang, CHENG Yanfen, MENG Junlong, FENG Cuiping, GENG Xueran, XU Lijing, GUO Dongdong   

  1. (1. College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; 2. Shanxi Engineering Research Center of Edible Fungi, Taigu 030801, China; 3. Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China)
  • Published:2023-04-25

摘要: 为研究超声辅助H2O2降解对鳞杯伞子实体多糖(Clitocybe squamulose fruiting body polysaccharide,CSFP)理化性质与活性的影响,通过H2O2降解法、超声波降解法、超声辅助H2O2降解法制备3 种降解CSFP,分别记为H-CSFP、U-CSFP、UH-CSFP。分子质量和单糖组成测定结果表明CSFP由I、II、III 3 个不同分子质量组分构成,与CSFP相比,H-CSFP、U-CSFP和UH-CSFP的组分I和III分子质量降低,占比升高,而组分II分子质量升高,占比降低;但是不同降解方法均不影响多糖的单糖组成。扫描电子显微镜观察发现降解后多糖表面孔隙密度增加或直径增大,表明降解使多糖结构更松散。零剪切黏度和平均粒径测定结果表明,与降解前相比,降解后多糖零剪切黏度和平均粒径均显著降低,表明经过不同方法处理,CSFP发生不同程度降解。傅里叶变换红外光谱分析结果表明降解没有破坏多糖的主要官能团。流变特性分析结果表明降解使多糖表观黏度和凝胶特性减弱。对CSFP、H-CSFP、U-CSFP和UH-CSFP总糖、糖醛酸、硫酸基质量分数和体外抗氧化活性检测结果表明,降解前后,除UH-CSFP以外,其余各组总糖质量分数无明显变化,各组糖醛酸和硫酸基质量分数降解后有所提高,体外抗氧化活性表现为UH-CSFP>U-CSFP>H-CSFP>CSFP,由Pearson相关性分析可知,CSFP硫酸基质量分数与•OH清除率和总还原力极显著相关(P<0.01),与2,2’-联氮-双-3-乙基苯并噻唑啉-6-磺酸阳离子自由基清除率显著相关(P<0.05),与1,1-二苯基-2-三硝基苯肼自由基清除率无显著相关性(P>0.05)。本研究可为CSFP在食品、药品、保健品等领域的应用提供理论参考。

关键词: 鳞杯伞;多糖;降解;理化性质;抗氧化性

Abstract: Polysaccharides from the fruiting body of Clitocybe squamulosaruiting (CSFP) were extracted by ultrasonic-assisted hot water extaction and were degraded by three different methods, i.e., H2O2 degradation, ultrasonic degradation and ultrasonic-assisted H2O2 degradation. The resulting products were named as H-CSFP, U-CSFP, and UH-CSFP, respectively. CSFP consisted of three fractions (I, II and III) with different molecular masses. The molecular masses of fractions I and III in H-CSFP, U-CSFP and UH-CSFP were lower than those in CSFP, and their proportions were higher in these degraded polysaccharides than in CSFP; however, the opposite was true for the molecular mass and proportion of fraction III. The monosaccharide composition of CSFP was not affected by each of the degradation methods. Scanning electron microscopy (SEM) showed that the density or diameter of pores on the surface of CSFP increased after degradation, indicating looser structure. The zero shear viscosity and average particle size of CSFP decreased significantly after degradation. Fourier transform infrared spectroscopy (FTIR) showed the major functional groups of CSFP were not damaged after degradation, while the apparent viscosity and gel properties were weakened. Compared with CSFP, all degraded polysaccharides except UH-CSFP showed no significant difference in total sugar content but an increase in the contents of sulfate and uronic acid. The decreasing order of the antioxidant activity in vitro was UH-CSFP > U-CSFP > H-CSFP > CSFP. Pearson correlation analysis showed that the content of sulfate group was largely significantly correlated with the hydrolxyl radical scavenging capacity and total reducing power (P < 0.01) as well as the scavenging capacity against 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical cation (P < 0.05), although it was not correlated with the scavenging capacity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical (P > 0.05). The results of this study provide a theoretical reference for the application of Clitocybe squamulosa polysaccharides in the fields of food, medicine and health products.

Key words: Clitocybe squamulosa; polysaccharide; degradation; phsicochemical properties; antioxidant activity

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