Generation of volatile ammonia from urea fungicidal to Phellinus noxius in infested wood in soil under controlled conditions     

Chang  & Chang 《Plant pathology》1999,48(3):337-344

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桑黄子实体与菌丝体营养成分的比较分析   总被引：2，自引：0，他引：2  

回晶  李辉  朱春玉  李其久  胡凤庆 《特产研究》2009,31(2):59-61

对桑黄子实体与菌丝体的营养成分进行了分析比较。结果表明,一般营养成分中。除灰分两者相差不大。而菌丝体中粗蛋白、粗脂肪、多糖、还原糖、总糖的含量均明显高于子实体;在所测定的17种氨基酸中,菌丝体总氨基酸的含量明显高于子实体。两者必需氨基酸占氨基酸总量的质量分数比例基本一致;菌丝体总脂肪酸含量比子实体稍高,主要是饱和脂肪酸和多不饱和脂肪酸的含量稍高。  相似文献   

裂蹄木层孔菌发酵产物抑菌活性的研究   总被引：1，自引：1，他引：0  

邹莉谭昀  杨民宝 《中国农学通报》2013,29(21):78-82

为了研究裂蹄木层孔菌发酵产物对植物病原菌的抑菌活性。采用菌丝生长速率法测定裂蹄木层孔菌不同发酵时间的产物对7种供试病原菌的抑制作用,将裂蹄木层孔菌的发酵产物进行不同的处理,分级纯化抑菌活性多糖,比较其抑菌活性。结果表明：裂蹄木层孔菌发酵产物对7种病原菌均有抑制作用;发酵时间为20天的裂蹄木层孔菌发酵产物对杨树烂皮病的抑制率最高;裂蹄木层孔菌发酵产物的主要抑菌活性物质存在于发酵上清液醇提物中;醇沉级别为30%（浓度为50 mg/mL）醇提物中的多糖对病原菌的抑制率为供试醇沉级别中最高。说明裂蹄木层孔菌含有抑制病原菌的有效成分,具备成为新型生物农药的潜力。  相似文献   

野生桑黄菌固体培养基配方的优化试验   总被引：1，自引：0，他引：1  

吕英华  杜明  高凯  李玉平  苏利红  杨利利  宋新华 《蚕业科学》2010,36(4):676-679

桑黄菌是一种具有重要开发价值的药用真菌。以菌丝日均生长速度为指标,比较野生桑黄菌在玉米粉综合培养基、马铃薯综合培养基、木生菌标准培养基上的生长情况,结果表明野生桑黄菌在玉米粉综合培养基上的日均生长速度最快。在选择葡萄糖为碳源,玉米粉+蛋白胨为氮源的基础上,通过L9(34)正交试验设计优化野生桑黄菌固体培养基的配方为:20g/L葡萄糖,20g/L玉米粉,1g/L蛋白胨,0.3g/L MgSO4,2g/L KH2PO4,20g/L琼脂。  相似文献   

Characteristics of aspen infected with heartrot: Implications for cavity-nesting birds     

Chris Witt 《Forest Ecology and Management》2010

Phellinus tremulae is an important fungal decay agent common to aspen and a critical component to the cavity-nesting bird complex found in western aspen stands. Little information exists on the conditions that facilitate infection and spread of P. tremulae in aspen forests. I used Forest Inventory and Analysis (FIA) data to explore the relationships of several tree and stand characteristics to the presence and frequency of P. tremulae in aspen measured across several western states of the United States. Results suggest a strong relationship between tree age, tree diameter, and compacted crown ratio with infection frequency in trees while stand purity, canopy cover and stand age had a positive relationship with the occurrence of P. tremulae in forest stands containing aspen. Logistic regression modeling identified stand age as the only variable that increased the odds of predicting infection at the stand-level while all tree-level variables were included in the tree model. Data also show that infection rates in the study area were lower than in other parts of aspen's range, and that average size of infected trees was smaller in the study area than those reported elsewhere. These results have important implications to management of aspen for wildlife, especially for birds that use decayed aspen for nesting.  相似文献   

Composition and proposed structure of a water-soluble glycan from the Keumsa Sangwhang Mushroom (Phellinus linteus)   总被引：1，自引：0，他引：1  

Baker JR  Kim JS  Park SY 《Fitoterapia》2008,79(5):345-350

Phellinus linteus is a mushroom which has been prized in Korea for its medicinal properties since ancient times. A glycan preparation from this source has shown promise in experimental anti-tumour and metastasis studies, but the glycan has not been well characterized. In the present work, the glycan fraction of a hot water extract from P. linteus (Keumsa Sangwhang Mushroom, Korea) has been isolated following ammonium sulfate precipitation, dialysis/concentration and anion exchange chromatographic steps. Analyses for monosaccharide composition showed glucose and mannose to be the major constituents. Digestion of the glycan fraction with specific glycosidases and by linkage analysis allowed us to propose a core beta(1-3) linked glucan heavily substituted via (1-6) links with beta(1-3) linked mannose chains. Significant levels of galactose and xylose, present in the glycan fraction, may be associated with this glucomannan or not. These findings are consistent with the view that a core beta(1-3)-linked glucan chain with beta(1-6) branch points is a common feature of mushroom glycans possessing anti-tumour activity.  相似文献   

桑黄子实体多糖提取工艺及单糖组成研究   总被引：1，自引：0，他引：1  

秦俊哲  刘华 《中国食用菌》2008,27(6)

通过单因素试验和正交试验,从提取温度、料液比、提取次数、提取时间4个方面研究桑黄子实体多糖提取条件,得出最佳条件为:提取温度95℃,料液比1∶50,提取次数2次,提取时间2h。运用薄层色谱和气相色谱分析单糖组成,日本桑黄子实体多糖的单糖组成为鼠李糖、阿拉伯糖、葡萄糖、甘露糖和半乳糖;韩国桑黄子实体多糖的单糖组成为鼠李糖、阿拉伯糖、木糖、葡萄糖、甘露糖和半乳糖。  相似文献   

桑黄多糖抗疲劳及耐缺氧实验研究     

郭俊平  赵述淼  马姝萍  梁运祥 《中国食用菌》2012,31(3):42-46

研究采用水提醇沉法得到桑黄菌丝多糖(大分子量粗多糖),通过小鼠抗疲劳、耐缺氧能力实验,研究桑黄菌丝多糖的生理活性。以小鼠游泳力竭时间、游泳前后血乳酸、肝糖原以及血清尿素氮含量的变化为指标,考察桑黄多糖抗疲劳能力,以小鼠在缺氧和亚硝酸钠中毒环境下的存活时间为指标,考察桑黄多糖耐缺氧能力。结果表明,灌胃桑黄多糖可以显著延长小鼠游泳时间达70.62%,降低游泳后乳酸曲线下面积22.89%,提高肝糖原储备33.36%,减少游泳后血清尿素氮含量23.17%,延长小鼠在缺氧环境下42.08%和亚硝酸钠中毒环境下35.29%的存活时间。因此,桑黄多糖具有提高小鼠抗疲劳和耐缺氧能力的作用,且在一定剂量范围内,实验效果与灌胃剂量呈正效应关系。  相似文献   

桑黄多糖的研究进展   总被引：2，自引：0，他引：2  

张林芳  邹莉 《中国食用菌》2012,(4):1-4

桑黄(Phellinus)是国际公认抗癌效果较好的大型药用真菌之一,桑黄代谢产生的多糖具有明显的抑制肿瘤和提高机体免疫力的功效,为当前新型抗癌药物研究领域的热点。就桑黄多糖的化学结构、提取纯化方式及其药理作用进行了综述,并总结了桑黄多糖的产品开发情况,旨在为开发桑黄功能保健品和药品提供理论依据。  相似文献   

桑黄菌丝固体培养基及培养条件研究   总被引：1，自引：0，他引：1  

刘红锦  张苏珍  蒋宁  陈忠立  孙道权 《江西农业学报》2012,(11):123-124,128

首先利用单因素试验对桑黄菌丝培养基基本成分进行确定,然后利用正交设计对其配比及生长条件加以优化,得出最佳配比及条件:葡萄糖20 g,蛋白胨2.2 g,磷酸二氢钾0.46 g,磷酸氢二钾1.0 g,硫酸镁0.5 g,琼脂20.0 g,水1000 mL,pH为7,培养温度为28℃。  相似文献