[关键词]
[摘要]
以新疆肉苁蓉(Cistanche deserticola Y. C. Ma)为试材,主动气调处理(6% CO2+4% O2+90% N2,体积分数)结合不同包装材料PE膜[透氧量为300 cm3/(m2•d)]、微孔膜M1[透氧量为6 000 cm3/(m2•d)]、微孔膜M2(透氧量为8 000 cm3/(m2•d))对鲜切肉苁蓉在低温(4±0.5)℃贮藏中活性成分变化和抗氧化性的影响。结果表明:贮藏7 d后,采用气调微孔膜(6% CO2+4% O2+90% N2+M1)处理组中PPO活性为2.07 U/g、褐变度为0.57 OD410/g,均低于CK组;维生素C、总酚、类黄酮、总多糖、松果菊苷和毛蕊花糖苷含量分别较CK组高13.00%、5.88%、11.24%、14.45%、1.20%、1.47%;DPPH、ABTS+自由基清除率及FRAP值分别较CK组高8.97%、1.99%、11.43%。可见6% CO2+4% O2+90% N2+M1微孔膜处理能显著减缓鲜切肉苁蓉中活性成分的下降(P<0.05),维持其较高的抗氧化能力,减缓衰老程度,较好的保持鲜切肉苁蓉的药食同源性,是一种较好的鲜切肉苁蓉贮藏保鲜方法。
[Key word]
[Abstract]
Cistanche deserticola planted in Xinjiang was used as the test material, and the effects of the active modified atmosphere treatment (6% CO2+4% O2+90% N2) combined with different packaging materials PE film (oxygen permeation 300 cm3/(m2•d)), microporous membrane M1 (oxygen permeation 6,000 cm3/(m2•d)) and microporous membrane M2 (oxygen permeation 8,000 cm3/(m2•d)) on the changes of active components and antioxidant activities of the fresh-cut Cistanche deserticola stored at a low temperature, (4±0.5)℃. The results showed that after 7 days of storage, the PPO activity and browning degree for the group treated with modified atmosphere microporous membrane (6% CO2+4% O2+90% N2+M1) were 2.07 U/g and 0.57 OD410/g, respectively, which were lower than those of the CK group. The contents of Vc, total phenolics, flavonoids, total polysaccharides, echinacoside and calycoside were 13.00%, 5.88%, 11.24%, 14.45%, 1.20% and 1.47%, respectively, higher than those of the CK group. The DPPH and ABTS+ free radical scavenging rates and FRAP value for the group treated with 6% CO2+4% O2+90% N2+M1 microporous membrane were 8.97%, 1.99% and 11.43%, respectively, higher than those of the CK group. Accordingly, the 6% CO2+4% O2+90% N2+M1 treatment could significantly retard the decrease of the active components of the fresh-cut C. deserticola, and maintain its high antioxidant capacity and slow down its senescence, thereby maintaining better the medicine and food homology of fresh-cut C. deserticola. This would be a good preservation method for fresh-cut C. deserticola.
[中图分类号]
[基金项目]
新疆自治区区域协同创新专项(2020E01048)