摘要
通过考察不同功率(0、150、250 W)和时间(0、30、90 s)条件下低温常压等离子体(cold atmospheric plasma,CAP)对树莓贮藏期间腐烂率、质量损失率、呼吸速率、总酚含量、花青素含量、丙二醛含量、过氧化氢含量等指标的影响,旨在探讨CAP对树莓采后保鲜的作用与机理。结果表明,在功率250 W、时间90 s条件下,CAP可将新鲜树莓室温贮藏期延长2~5 d,在贮藏第5天,与对照组相比,该条件下的CAP有效降低果实腐烂率至22.61%,降低果实质量损失率至35.97%,而且不影响果实的出汁率与可溶性固形物含量;可有效维持树莓可滴定酸质量分数(1.16%)、可溶性蛋白含量(204.5 mg/100 g)和花青素质量浓度(107.7 mg/L),同时提高了总酚含量(85.72 mg/100 g),抑制了呼吸速率(5.683 mg/(kg·h)),降低了果实中丙二醛含量(30.99 mmol/g)和过氧化氢浓度(6.858 mmol/L),并提高了超氧阴离子自由基的清除能力(4.21 U/g)。因此,CAP是一种有效延长树莓货架期并维持其品质的保鲜方法。
This study investigated the effect of cold atmospheric plasma(CAP)at different combinations of power(0,150,and 250 W)and time(0,30 and 90 s)on the decay incidence,percent mass loss,respiration rate,total phenolic content,anthocyanin content,malondialdehyde(MDA)content,and H2O2 content of raspberry fruits during postharvest storage.The aim was to explore the effect and mechanism of CAP on the postharvest preservation of raspberry fruits.The results showed that CAP at 250 W,90 s extended the storage life of raspberry fruits by 2–5 days.On the 5th day of storage,the decay incidence and percent mass loss of the treated fruit were 22.61%and 35.97%,which were both lower than those of the control group;however,there was no significant difference in juice yield or total soluble solid content between the two groups.Besides,the treatment maintained the titratable acid(1.16%),soluble protein(204.5 mg/100 g)and anthocyanin(107.7 mg/L)contents,increased the synthesis of total phenols(85.72 mg/100 g),inhibited the respiration rate(5.683 mg/(kg·h)),decreased the contents of malonaldehyde(30.99 mmol/g)and H2O2(6.858 mmol/L),and improved the superoxide anion free radical scavenging capacity(4.21 U/g).Therefore,CAP is effective in extending the shelf life of raspberry fruits while maintaining its quality.
作者
李毅
杨帅
柳佳清
刘鑫茹
董露露
龙海涛
蒲陆梅
段建玲
LI Yi;YANG Shuai;LIU Jiaqing;LIU Xinru;DONG Lulu;LONG Haitao;PU Lumei;DUAN Jianling(College of Science,Gansu Agricultural University,Lanzhou 730070,China;Gansu Lintao Haoguozi Ecological Agriculture Technology Development Co.Ltd.,Dingxi 730500,China)
出处
《食品科学》
北大核心
2025年第4期227-236,共10页
Food Science
基金
国家自然科学基金地区科学基金项目(31860472)。
关键词
低温常压等离子体
树莓
采后
贮藏品质
cold atmospheric plasma
raspberry
postharvest
storage quality
