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蛹虫草液体培养条件优化及有效成分含量分析 总被引:9,自引:0,他引:9
为优化蛹虫草菌的液体培养条件,对蛹虫草菌丝体进行液体摇瓶培养。以干菌丝体得率为指标,对影响发酵产量的重要因子设计正交试验,得出最佳培养条件。在最优条件下扩大培养,检测此时菌丝体中虫草素及虫草多糖含量。结果表明:蛹虫草菌丝体液体发酵的最适条件为:接种量10 % (v/v) ,发酵初始pH7 0 ,发酵温度2 7℃,发酵时间96h。扩大培养后,测得菌丝体中虫草素的含量为5 1 785mg/10 0g ,虫草精多糖含量为1 92g/10 0g。 相似文献
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在培养基内添加不同量的锌,研究其对蛹虫草子实体的形成、子实体和菌丝体生物量、子实体多糖含量和葡萄糖含量的影响,以及蛹虫草子实体和菌丝体对锌的富集能力。结果表明锌对上述各项都有影响。液体培养条件下,锌浓度在453906mg/L范围内可以促进菌丝体生长,锌浓度超过4077mg/L时,菌丝生长受到抑制。培养基锌的浓度在4077mg/L以下时,蛹虫草菌丝体锌的富集量随着液体培养基锌浓度的提高而提高。固体培养条件下,锌含量在226453mg/kg范围内可以促进蛹虫草子实体生长,并且在此含量范围内,蛹虫草子实体中葡萄糖含量较高。培养基锌含量在680906mg/kg时,子实体多糖含量较高。培养基锌含量在2038mg/kg以下时,蛹虫草子实体中锌的富集量随着培养基锌含量的提高而提高,在培养基锌含量为2038mg/kg时,子实体中锌的含量达到28570mg/kg(干重)。 相似文献
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蝙蝠蛾拟青霉液体发酵工艺优化及菌丝体腺苷含量的检测 总被引:2,自引:0,他引:2
通过摇瓶液体培养的方法,以菌丝体生物量为主要考察指标,筛选蝙蝠蛾拟青霉PH-2菌株液体发酵的培养基成分和条件。进一步采用正交试验,以菌丝体生物量和腺苷含量为联合指标,确定PH-2菌株液体发酵高产菌丝体和腺苷的培养基配方。通过试验获得的最佳配方为:玉米淀粉40g/L,葡萄糖5g/L,玉米浆25g/L,硫酸镁·7H2O 1g/L,磷酸二氢钾1g/L,硫酸锌1.5g/L,维生素B1 25mg/L;培养条件为:初始pH 6.0,装液量150mL/500mL,接种量8%(V/V),温度26℃,转速120r/min,培养7d。在该工艺下,菌丝体生物量达到25.2g/L。应用高效液相色谱(HPLC)法,检测到菌丝体中腺苷含量为2.76mg/g。该方法简便、快速、准确,可作为蝙蝠蛾拟青霉菌丝体或其相关产品中腺苷的检测手段。本工艺的优化试验获得了较高的菌丝体收率,菌丝体质量良好。 相似文献
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药用真菌桑黄液体深层发酵条件的优化 总被引:3,自引:0,他引:3
以菌丝体生物量和多糖产量为主要指标,对桑黄(鲍氏层孔菌)的深层发酵条件进行了优化,通过单因素试验和四因素三水平正交试验筛选出了桑黄液体发酵的培养基,结果表明,最适培养基为:葡萄糖5g/L,玉米粉40g/L,豆饼粉20g/L,KH2PO41.5g/L,MgSO41g/L。进一步通过培养条件的优化,得到最适菌丝体生长的液体发酵条件为:培养温度28℃,摇床转速140r/min,pH值自然,接种量10%,装液量100mL(250mL三角瓶),发酵周期132h。 相似文献
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为了明确不同培养条件下杏鲍菇对外源硒的耐受性,分别在固体培养基、液体发酵培养基和栽培基质中添加不同量的亚硒酸钠,并检测杏鲍菇子实体中富集硒的存在形态。结果表明:固体培养条件下,硒浓度低于160 mg/L时,对菌丝的生长没有显著影响;液体培养条件下,4 mg/L的硒元素即可对杏鲍菇菌丝体的生长产生显著抑制;栽培模式下,基质中补充10~600 mg/kg的硒元素,不会影响杏鲍菇菌丝体的生长,且子实体中的硒含量会随基质中硒浓度的增加而增加。子实体硒形态分析表明,富集硒以硒代蛋氨酸、甲基硒代半胱氨酸、硒代胱氨酸和亚硒酸盐[Se(IV)]四种形式存在,其中硒代蛋氨酸是硒与氨基酸的主要结合形式。 相似文献
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通过对桑黄液体发酵培养基、培养条件优化实验研究,以获得具有与桑黄子实体相似功效成分的桑黄菌丝体液体发酵工艺。以菌丝体收率为主要考察指标,采用单因子及L9(34)正交实验的方法,对桑黄液体发酵培养基及培养条件进行优化,确定桑黄液体发酵工艺条件。桑黄液体发酵最佳培养基及培养条件:玉米粉2%,葡萄糖3%,酵母膏0.5%,蛋白胨0.5%,KH2PO40.3%,Mg SO4·7H2O 0.15%,VB120μg/100 m L,p H5.5,接种量8%,培养温度28℃,摇床转数180 r/min,培养周期82 h。优化条件下所获得桑黄菌丝体粉为土黄色,菌丝体平均得率为1.67%,菌丝体黄酮含量(0.84%)与桑黄子实体(0.88%)相当,菌丝体多糖含量(5.15%)是子实体(1.71%)的3倍。可见,该桑黄液体发酵工艺具有较大的推广应用价值。 相似文献
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为了优化富硒荷叶离褶伞菌丝体胞内粗多糖发酵条件,在单因素试验基础上,考察灭菌条件、培养时间、硒添加量和硒添加时间对富硒荷叶离褶伞菌丝体胞内粗多糖的影响,并通过Box-Benhnken实验设计和响应面分析法确定最优发酵条件。结果表明,在121℃、20min条件下对培养基和Na2SeO3溶液分别灭菌后混合,在发酵至第129h,发酵液中添加4µg/mL Na2SeO3,继续发酵至第244h,发酵产生的富硒荷叶离褶伞菌丝体胞内粗多糖含量为349.8mg/100mL。 相似文献
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不同培养条件对中国被毛孢胞内核苷类组分的影响 总被引:1,自引:0,他引:1
采用紫外分光光度法,对冬虫夏草Cordyceps sinensis无性型——中国被毛孢Hirsutella sinensis液体摇瓶培养时胞内核苷类组分的形成积累条件进行了研究。结果表明:菌丝体中核苷类成分形成积累的最适摇瓶培养条件是碳源为葡萄糖:氮源为酵母浸出粉:微量元素为MgSO_4·7H_2O和KH_2PO_4;起始pH值6.5:摇瓶装液量100mL/500mL:摇床转数180r/min:接种量10%。正交试验结果表明最佳培养基配方为葡萄糖2%,酵母浸出粉3%,奶粉1%,MgSO_4·7H_2O 0.1%,KH_2PO_40.2%。培养条件优化后,菌丝体中总核苷的含量可达6.5748mg/g,比优化前提高了33.6%。 相似文献
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黄伞菌丝蛋白质营养价值评价 总被引:3,自引:0,他引:3
本文测定了黄伞Pholiotaadiposa菌丝粗蛋白含量和氨基酸组成,采用国际上通用的营养价值评价方法,对其蛋白质的营养价值进行全面评价,并与营养价值较高的白灵侧耳Pleurotusnebrodensis、刺芹侧耳Pleurotuseryngii和金顶侧耳Pleurotrscitrinopileatus进行比较。分析结果表明,黄伞菌丝的必需氨基酸含量最高,占其氨基酸总量的43.9%,蛋白质的氨基酸评分(AAS)、化学评分(CS)、必需氨基酸指数(EAAI)、生物价(BV)、营养指数(NI)和氨基酸比值系数分(SRCAA)分别为92.0、71.3、88.5、84.8、40.4和78.8,六项指标均比参比食用菌高。结果说明黄伞菌丝具有很高的营养价值。 相似文献
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Hanai H Ishida S Saito C Maita T Kusano M Tamogami S Noma M 《Bioscience, biotechnology, and biochemistry》2005,69(1):123-127
When supplemented to the culture medium of mushroom Coprinus cinereus, rice husks soaked beforehand in methanol stimulated mycelia growth up to a concentration of 80 mg/ml dose-dependently, whereas the non-treated stimulated mycelia growth up to 20 mg/ml. This result suggests the existence of both stimulatory and inhibitory substances in rice husks. Since momilactone A (MLA) is recognized as one of the phytoalexins in rice husks, its biological activity against mycelia growth was tested. Momilactone A inhibited mycelia growth at 5 microg/disc, whereas the methanol extract of husks did so at 1 mg/disc, wherein 0.2 microg of MLA was estimated by LC/MS/MS. Thus the phytoalexins including MLA should inhibit mycelia growth. Rice husks stimulated mycelia growth in some edible mushroom species such as Grifola frondosa (maitake), Lentinus edodes (shiitake), Pleurotus eryngii (eringi), and P. ostreatus (hiratake). Our findings might lead to the development of new profitable cultivation methods for mushrooms using rice husks. 相似文献
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The initial moisture content, cultivation time, inoculum size and concentration of basal medium were optimized in solid state fermentation (SSF) for the production of xylanase by an Aspergillus niger mutant using statistical experimental designs. The cultivation time and concentration of basal medium were the most important factors affecting xylanase activity. An inoculum size of 5 x 10(5) spores/g, initial moisture content of 65%, cultivation time of 5 days and 10 times concentration of basal medium containing 50 times concentration of corn steep liquor were optimum for xylanase production in SSF. Under the optimized conditions, the activity and productivity of xylanase obtained after 5 days of fermentation were 5,071 IU/g of rice straw and 14,790 IU l(-1) h(-1), respectively. The xylanase activity predicted by a polynomial model was 5,484 IU/g of rice straw. 相似文献
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对新疆阿魏菇与杏鲍菇的氨基酸成分进行系统分析,结果显示新疆本地的阿魏菇和杏鲍菇中17种氨基酸含量丰富,种类齐全,阿魏菇中氨基酸总量为16.80%高于杏鲍菇中氨基酸总量(14.34%);两种菇中必需氨基酸含量(EAA)占总氨基酸含量的比例分别为34.72%和37.92%。新疆阿魏菇与杏鲍菇种富含人体必需的氨基酸,可作为饮食氨基酸来源的重要补充。 相似文献
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Effect of Pseudomonas sp. P7014 on the growth of edible mushroom Pleurotus eryngii in bottle culture for commercial production 总被引:1,自引:0,他引:1
Kim MK Math RK Cho KM Shin KJ Kim JO Ryu JS Lee YH Yun HD 《Bioresource technology》2008,99(8):3306-3308
Addition of bacterial culture strain P7014 and its supernatant to the mushroom growing media resulted in mushroom mycelia run faster. Mycelial growth rate of Pleurotus eryngii was increased up to 1.6 fold and primordial formation was induced one day earlier. Moreover, it was supposed that addition of bacteria had beneficial applications for commercial mushroom production, which appreciably reduced total number of days for cultivation of about 5+/-2 days compared with uninoculated, which took 55+/-2 days. 相似文献
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Identical masses of submerged Trichoderma viride mycelia of various ages were used as inoculum for a second submerged cultivation lasting for 24 h. It was found that the
growth yield of secondary culture was dependent on the age of inoculum. The growth yields increased when the age of primary
culture was less than 3 d, and decreased down to zero when older mycelia were inoculated. The mycelia were living even after
1 month of submerged cultivation, as they formed conidia after inoculating onto solid medium. In order to elucidate underlying
biochemical processes, developmental changes of specific activities of organellar marker enzymes were measured in the mitochondrial/vacuolar
and microsomal fractions of mycelia. These activities changed during the growth of mycelia in a biphasic manner and their
time courses were remarkably similar. Only the H+-ATPase activity decreased monophasically with the age of mycelia. Membrane-bound proteases of both membrane fractions changed
differently upon ageing. These results could not be explained as a consequence of nutrient starvation and indicate that the
prolonged submerged cultivation triggers coordinated series of biochemical events which leads to the loss of growth competence. 相似文献
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从小麦根际分离到1株对食用菌有较强促生作用的荧光假单胞菌,命名为假单胞菌P2-10(Pseudomonas sp.P2-10)。该菌株与平菇天达300(Pleurotus ostreatus Td 300)、杏鲍菇杏6(Pleurotus eryngii X6)或鸡腿菇瑞7(Coprinus comatus R7)混合培养,可显著提高这些食用菌菌丝生长速度及诱导并促进子实体的形成和发育。假单胞菌P2-10对食用菌的促生作用来自其代谢产物,可能是通过其1-氨基环丙烷-1-羧酸(ACC)脱氨酶降解食用菌产生的ACC、减少食用菌乙烯的合成及乙烯对菌丝生长和子实体发育的抑制作用。 相似文献