高二氧化碳结合低氧处理对杏鲍菇细胞壁的影响

doi:10.7668/hbnxb.2014.05.033

摘要/Abstract

摘要： 旨在研究高二氧化碳结合低氧处理对杏鲍菇细胞壁成分(蛋白质、多糖、几丁质)、咀嚼度及超微结构的影响。在温度(22±1)℃、相对湿度90% ~95%的条件下,以空气为对照(CK),采用气调(CA,2%O₂+30%CO₂)对杏鲍菇进行货架期试验。结果表明,货架期间CA的咀嚼度显著高于CK。CA可以有效延缓杏鲍菇细胞壁水溶性蛋白质和1 mol/L NaOH可溶性蛋白质的降解,维持了细胞壁总蛋白质含量及细胞壁结构完整。CA有效抑制杏鲍菇多糖含量的下降,其对水溶性多糖、10 mol/L NaOH可溶性多糖分解的抑制作用较为明显。此外,CA显著促进了水溶性几丁质、10 mol/L NaOH可溶性几丁质、HCl/1 mol/L NaOH可溶性几丁质的积累,延缓其分解,有效抑制了杏鲍菇细胞壁几丁质含量的下降,有助于维持其硬度及咀嚼度。杏鲍菇超微结构结果也表明,CA保持杏鲍菇细胞壁结构的完整性与稳定性,较好地维持杏鲍菇咀嚼度。综上所述,CA通过影响菇体细胞壁的代谢来保持杏鲍菇的食用品质。

关键词: 杏鲍菇, 气调, 细胞壁, 超微结构

Abstract: To investigate the change of cell wall composition,Pleurotus eryngii were stored in a controlled atmosphere(CA,2% O₂+30% CO₂)at(22±1)℃ and 90% -95% relative humidity for 5 d and cell wall composition(Proteins,polysaccharides,chitin),chewiness and ultrastructure were analyzed over the 5 d storage period.Results showed that the chewiness of CA mushroom was higher than that in CK.CA delayed the decomposition of water soluble and 1 mol/L NaOH soluble protein,maintaining the total protein of Pleurotus eryngii cellwall.CA exerted an inhibitory influence on decomposition of water soluble polysaccharide and 10 mol/L NaOH in Peurotus eryngii cellwall.CA promoted the accumulation of water soluble,10 mol/L NaOH soluble,HCl/1 mol/L NaOH soluble chitin and delayed the decomposition of them.CA surpressed the degradation of chitin and retained the hardness and chewiness of Pleurotus eryngii.The ultrastructure photograph also showed that CA kept the integrity and stability of Pleurotus eryngii cell wall.In conclusion,CA keep a good edible quality of Pleurotus eryngii through affecting mushroom cell wall composition.

Key words: Pleurotus eryngii, Controlled atmosphere, Cell wall, Ultrastructure

中图分类号:

TS255.3

张璇, 古荣鑫, 胡花丽, 王毓宁, 李鹏霞. 高二氧化碳结合低氧处理对杏鲍菇细胞壁的影响[J]. 华北农学报, 2014, 29(5): 193-199. doi: 10.7668/hbnxb.2014.05.033.

ZHANG Xuan, GU Rong-xin, HU Hua-li, WANG Yu-ning, LI Peng-xia. High Concentrations of CO₂ and Low O₂ Storage Effects on Cell Wall of Pleurotus eryngii[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(5): 193-199. doi: 10.7668/hbnxb.2014.05.033.

http://www.hbnxb.net/CN/Y2014/V29/I5/193

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