草地学报 ›› 2024, Vol. 32 ›› Issue (1): 297-304.DOI: 10.11733/j.issn.1007-0435.2024.01.030

• 技术研发 • 上一篇    下一篇

超声波萃取苦荬菜叶中β-谷甾醇的工艺优化及其动态积累

闫雨婷1, 郝俊峰1, 荣荣2, 贾玉山1, 王志军1, 格根图1   

  1. 1. 内蒙古农业大学草原与资源环境学院, 农业农村部饲草栽培、加工与高效利用重点实验室, 草地资源教育部 重点实验室, 内蒙古 呼和浩特 010019;
    2. 兴安盟林业和草原局, 内蒙古 乌兰浩特 137400
  • 收稿日期:2023-07-19 修回日期:2023-10-06 出版日期:2024-01-15 发布日期:2024-01-30
  • 通讯作者: 格根图,E-mail:gegentu@163.com
  • 作者简介:闫雨婷(2000-),汉族,黑龙江牡丹江人,硕士研究生,主要从事牧草加工与利用研究,E-mail:15214628108@163.com
  • 基金资助:
    内蒙古自治区自然科学基金(2021MS03095);自治区级大学生创新创业训练计划(202110129017)资助

Process Optimization of Ultrasonic Extraction of β-sitosterol from Leaves of Lactuca indica L. and Its Dynamic Accumulation

YAN Yu-ting1, HAO Jun-feng1, RONG Rong2, JIA Yu-shan1, WANG Zhi-jun1, GE Gen-tu1   

  1. 1. College of Grassland and Resources and Environment, Inner Mongolia Agricultural University Key Laboratory of Forage Cultivation and the Processing and Highly Efficient Utilization of the Ministry of Agriculture, Key Laboratory of Grassland Resources of the Ministry of Education, Hohhot, Inner Mongolia 010019, China;
    2. Forestry and Grassland Bureau of Xing'anmeng League, Ulanhot, Inner Mongolia 137400, China
  • Received:2023-07-19 Revised:2023-10-06 Online:2024-01-15 Published:2024-01-30

摘要: 为优化超声波辅助提取蒙早苦荬菜(Lactuca indica L.cv. Mengzao)叶中β-谷甾醇的工艺条件,并探究不同生长期叶中β-谷甾醇的含量,本研究采用超声波辅助乙醇提取法,以料液比、超声频率、提取温度和提取时间为影响因素,以β-谷甾醇提取率为考核指标,采用单因素试验法和Box-Behnken方法优化了β-谷甾醇提取工艺,并测定了不同生育阶段蒙早苦荬菜叶的β-谷甾醇含量。结果表明:蒙早苦荬菜叶中β-谷甾醇的最佳提取工艺为提取时间20 min、温度60℃、频率80 KHz、料液比为1:30 g·mL-1。在此条件下,提取量达到最高,为12.08 mg·g-1。各因素对苦荬菜中β-谷甾醇提取量的影响大小顺序为:料液比>时间>频率>温度。对不同生育期(幼嫩期、营养生长期、开花初期、开花中期、开花末期、结实期)蒙早苦荬菜叶片的β-谷甾醇提取量进行分析发现,开花初期为最佳收获期,β-谷甾醇提取量最高,达13.22 mg·g-1。目前,β-谷甾醇多应用于医疗领域,但都处于探索阶段,仍需进行更为深入系统的研究。

关键词: 蒙早苦荬菜, β-谷甾醇, 超声波提取法, 生育期

Abstract: In order to optimize the process conditions for the ultrasound-assisted extraction of β-sitosterol from leaves of Lactuca indica L.cv. Mengzao, and to explore the content of β-sitosterol in leaves at different growth stages. The β-sitosterol extraction process was optimized by ultrasound-assisted ethanol extraction using the one-way test method and Box-Behnken method, with the material-liquid ratio, ultrasound frequency, extraction temperature and extraction time as the influencing factors, and the β-sitosterol extraction rate as the assessment index. The β-sitosterol content of L. indica leaves at different growth stages were also determined. The results showed that the optimal extraction process for β-sitosterol in L. indica leaves was 20 min extraction time, 60℃, 80 KHz frequency, and 1:30 g·mL-1 material-liquid ratio, under which the highest extraction amount of 12.08 mg·g-1 was achieved. And the order of the effect of each factor on the extraction amount of β-sitosterol in L. indica was as follows:material-liquid ratio>time>frequency>temperature. The amount of β-sitosterol extracted from L. indica leaves at different stages (young, nutritive, early flowering, mid-flowering, end-flowering, and fruiting) was analyzed, and the early flowering stage was the optimal harvesting stage, with the highest amount of β-sitosterol extracted, which was 13.22 mg·g-1. At present, β-sitosterol is mostly used in the medical field, but all of them are in the exploratory stage, and more in-depth and systematic researches are still needed.

Key words: Lactuca indica L.cv. Mengzao, β-sitosterol, Ultrasonic extraction, Growth stages

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