蛹虫草菌种退化的检测方法和影响因素

从蛹虫草菌种的退化表现、早期的检测方法、菌种退化的影响因素和退化菌种的复壮等方面对蛹虫草菌种退化进行总结,以期为蛹虫草菌种退化的研究提供新思路。     

虫草人工控制液体培养生态因子研究

通过人工控制液体培养虫草试验,研究了虫草人工控制液体栽培最佳碳、氮、无机盐、维生素种类、浓度及配比,以及最适pH和最适温度。结果表明:虫草液体培养的最适碳、氮组合为葡萄糖5.0 g/L、白糖3.0 g/L、蛋白胨2.0 g/L、牛肉膏1.0 g/L;最适无机盐和维生素是KH2PO41.0 g/L、MgSO4.7H2O0.5 g/L、CaCl2.2H2O0.5 g/L、VB10.1 g/L;最适pH5.5;最适温度是24℃。     

北虫草商品化栽培技术的研究

对4个北虫草菌株、5个培养基配方和3种栽培容器进行了北虫草栽培试验研究,并从经济效益方面对其进行了估算分析.结果表明:金地一号菌株优质、高产、商品性好、经济效益高,可作为今后北方地区室内栽培的当家优良菌株进行推广种植;小麦培养基栽培北虫草,不仅产量高、质量好,而且成本低,故采用小麦培养基更具有优势;塑料瓶栽培北虫草,具有重量轻、利于灭菌、可多次重复使用等特点,可作为今后商品化、规模化、工厂化栽培北虫草之首选容器.     

3株泰山虫草无性型的分子生物学研究

[目的]研究3株泰山虫草无性型的分子生物学特性。[方法]以野生泰山虫草子实体分离出的3个菌株为材料,通过对rDNAITS区的扩增、克隆和测序来鉴定虫草的无性型。[结果]3个菌株不是同1种,COA1为蛹草拟青霉,COA2为球孢白僵菌,COA3为细脚棒束孢,由此推断泰山虫草只是以地理位置得名。[结论]研究了3株泰山虫草无性型的分子生物学特性。     

青海省冬虫夏草寄主蝙蝠蛾幼虫肠道菌群变化分析

对青海全省分布的冬虫夏草寄主蝙蝠蛾幼虫、人工培养得到的幼虫,天然冬虫夏草寄生蝙蝠蛾幼虫的肠道菌群进行分离和培养,并进行对比分析实验。结果表明：从所有被检蝙蝠蛾幼虫的肠道中分离纯化出11个不同菌群,其中以葡萄菌属的数量较大,分离频率较高,为优势菌群,特别是可以确定LG03、LG04菌株是冬虫夏草寄生蝙蝠蛾幼虫肠道内的优势细菌。在人工培养的幼虫肠道内没有检出真菌,放线菌仅存在于自然采挖的冬虫夏草寄生的幼虫肠道内。     

Effects of edible-medicinal fungus crude extracts on vascular endothelial cells with high glucose-induced injury

AIM: To investigate the effects of crude extracts of Cordyceps gunnii (CGE), Lepista lentinus (LLE), Cordyceps sinensis (CSE) and Lentinus striguellus (LSE) on the proliferation of high glucose-treated human umbilical vein endothelial cells (HUVECs). METHODS: The cultured HUVECs were divided into normal control group (treated with M199 culture medium alone), high glucose group (treated with M199 culture medium containing 33 mmol/L glucose) and 4 crude extracts of edible-medicinal fungi (CGE, LLE, CSE and LSE) intervention groups (treated with the crude extract of edible-medicinal fungus at concentrations of 12.5, 25, 50, 100 mg/L in high glucose M199 culture medium). The cell proliferation was evaluated by MTT assay. The cell cycle and ROS level were measured by flow cytometry. RESULTS: Compared with normal control group, the MTT absorbance value and the percentage of G₀/G₁ stage of the HUVECs in high glucose group were significantly decreased (P<0.05), while the percentage of S+G₂/M and ROS level were significantly increased (P<0.05). Compared with high glucose group, treatment with the crude extracts of Lepista lentinus and Lentinus striguellus decreased the cell absorbance value (P<0.05), and the inhibitory effect was enhanced in a dose-dependent manner. However, Cordyceps gunnii had no effect (P>0.05). The crude extracts of Cordyceps sinensis (12.5~50 mg/L) significantly enhanced the proliferative activity of HUVECs, decreased the percentage of G₀/G₁ stage of HUVECs, increased the percentage of S+G₂/M of HUVECs, and reduced the intercellular ROS level (P<0.05). CONCLUSION: Only Cordyceps sinensis crude extract effectively protects the HUVECs in high glucose-induced injury, which might be due to promoting more cells to enter to the cell cycle and down-regulating oxidative stress.     

猴头菇饮料加工技术

介绍了猴头菇饮料的加工技术。该技术先进,工艺可靠,产品质量高营养成分损失少。     

蛹虫草饮料加工技术

介绍了蛹虫草饮料的加工技术。该技术先进,工艺可靠,产品质量高,营养成分损失少。     

三种多糖对小鼠免疫功能的影响

为探讨黄芪多糖、酵母胞壁多糖和虫草菌丝体多糖对动物免疫功能的影响,本试验分为对照组和黄芪多糖、酵母胞壁多糖、虫草菌丝体多糖,3种多糖等量复配4个试验组。每组选用昆明种小鼠40只,对照组小鼠每只灌胃1mL生理盐水,黄芪多糖、酵母胞壁多糖、虫草菌丝体多糖和3种多糖等量复配组小鼠每只灌胃量为140mg多糖/kg体重,每隔10d取样1次,分别检测增重率、免疫器官指数、血细胞数和外周血IgG含量。结果表明,黄芪多糖组、酵母胞壁多糖组和虫草菌丝体多糖组均可显著提高小鼠增重率、免疫器官指数、血细胞数目及外周血IgG含量(P<0.05),复合多糖组则与单多糖组相比差异显著(P<0.05)。说明3种多糖组及其混合多糖组均能提高小鼠免疫力,且最好的为混合多糖组。     

响应曲面法对蛹虫草多糖超声提取工艺的优化效果

为了优化蛹虫草多糖超声提取工艺,采用响应曲面法,根据中心旋转试验设计,研究超声提取时间、提取温度和液料比等工艺条件对提取率的影响。结果表明:蛹虫草多糖超声提取最佳工艺条件为超声提取时间65min、温度80℃、液固比32mL/g、提取2次,提取率可达3.89%。