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Analysis for the Volatile Secondary Metabolites of Mortierella alpina 被引量:9
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作者 刘欣 马小琛 +4 位作者 黄和 于文涛 纪晓俊 彭超 高振 《Agricultural Science & Technology》 CAS 2009年第4期12-14,21,共4页
[ Objective] The study was to investigate the volatile components of secondary metabolites from M. alpine producing arachidonic acid and explore the changes in its metabolic pathway. [ Method] The air above M. alpine ... [ Objective] The study was to investigate the volatile components of secondary metabolites from M. alpine producing arachidonic acid and explore the changes in its metabolic pathway. [ Method] The air above M. alpine broth was extracted by solid-phase microextraction(SPME) during the post-exponential phase of growth and analyzed by GC-MS. [Result] 13 compounds were identified, 12 of which were sesquiterpenes with C15H24 formula and accounting for 99.62% of the complete compounds. Thujopsene-( 12), α-Guaiene and Aristolene were three most sesquiterpenes accounting for 10.66%, 33.69% and 34.85% of total content respectively. It can be sufficiently certified that sesquiterpene metabolic pathway existing in M. alpine. [ Coclusion] Metabolic flux of sesquiterpene pathway increased to improve its mass accumulation, because one or several key enzyme genes mutation in isoprene or sesquiterpene pathway enhanced their activities during induction of mutation from initial strain. 展开更多
关键词 mortierella alpina SPME SESQUITERPENE Arachidonic acid
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23种生化因子对被孢霉Mortierella L sabeLina F-898生长代谢的影响 被引量:2
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作者 周晓兰 李斌 +2 位作者 施碧红 黄建忠 施巧琴 《福建师范大学学报(自然科学版)》 CAS CSCD 2001年第3期92-95,120,共5页
研究了 2 3种生化因子对 Mortierella Lsabe L ina F-989菌生长代谢的影响 .研究表明 :供试 2 3种生化因子对生长代谢均有不同程度的影响 ,其中 L-赖氨酸、Vit B6 、L-缬氨酸、LD-天冬氨酸、L-酪氨酸、L-丝氨酸、L -胱氨酸 7种生化因子... 研究了 2 3种生化因子对 Mortierella Lsabe L ina F-989菌生长代谢的影响 .研究表明 :供试 2 3种生化因子对生长代谢均有不同程度的影响 ,其中 L-赖氨酸、Vit B6 、L-缬氨酸、LD-天冬氨酸、L-酪氨酸、L-丝氨酸、L -胱氨酸 7种生化因子能显著提高孢子萌发率 ,而 LD-天冬氨酸、L -白氨酸、L -精氨酸、Vit B1、Vit B2 、L-甲硫氨酸、 L-谷氨酸、 L-羟膊氨酸、嘌呤等 ,对该菌分枝数、菌丝生长有一定的促进作用 .选择其中 6种生化因子进行多因子组合 ,研究表明 ,这 6种生化因子的组合对孢子萌发、菌丝生长、淀粉酶酶活性均比单因子效果更好 ,但对生物量提高不明显 ,且有 80 %~ 85 %的因子对蛋白酶有抑制作用 . 展开更多
关键词 被孢霉 生长代谢 生化因子 心血管病 多价不饱和脂肪酸
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Biosynthesis of Unsaturated Fatty Acids via Mortierella Isabellina Cultivated in a Medium Containing Butanol 被引量:3
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作者 XIAN Mo YAN Ji chang +4 位作者 CHENG Tie xin KANG Yi jian LI Wen xing BI Ying li ZHEN Kai ji 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第3期303-306,共4页
Mortierella isabellina was found to accumulate large amounts of unsaturated fatty acids when it was grown in a medium containing butanol(5 g/L) and yeast extract(10 g/L) and cultivated at 25 ℃ for 5 d during which ad... Mortierella isabellina was found to accumulate large amounts of unsaturated fatty acids when it was grown in a medium containing butanol(5 g/L) and yeast extract(10 g/L) and cultivated at 25 ℃ for 5 d during which additional feeding butanol of 2 g/L was fed after being cultivated for 48 h . The resultant mycelial lipids accounted for 40 1% of the dry mycelia, while about 34% of butanol in the medium was converted. The mycelial lipids contained four kinds of unsaturated fatty acids, i.e ., palmitoleic(4 9%), oleic(54 1%), linoleic(10 4%) and linolenic(5 4%) acids. Those accounted for 74 8% of the total fatty acids. The effects of the culture conditions, such as cultivation temperature, initial pH of the medium and additional feeding butanol in the course of cultivation, on the production of mycelial lipids by M. isabellina were studied. 展开更多
关键词 mortierella isabellina BUTANOL Unsaturated fatty acid BIOSYNTHESIS
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Enhancement of Arachidonic Acid Production by Mortierella isabellina Through Protoplast Regeneration Mutagenesis 被引量:3
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作者 LI Lina YU Changqing HAN Yuxi 《Journal of Northeast Agricultural University(English Edition)》 CAS 2011年第2期65-72,共8页
A developed method was used for the enhancement of arachidonic acid production by M. isabellina. An orthogonal, rotatable and central composite design was applied to determine the optimum conditions for protoplast reg... A developed method was used for the enhancement of arachidonic acid production by M. isabellina. An orthogonal, rotatable and central composite design was applied to determine the optimum conditions for protoplast regeneration mutagenesis. The results showed that a commixture enzyme (cellulase and glusulase) at the concentration of 4%, enzymolysis temperature at 30℃ and enzymolysis time on 7.5 h were the optimal conditions, in which the lethality of M. isabellina spores was 78.4%. After mutagenesis and re-screenings, M. isabellina mutant Y-69 was obtained. GC analysis showed that the yield of arachidonic acid by Y-69 (2.92 g. L-1) was 3.56 times higher than that of the wild-type strain (0.82 g.L-1). Pass generation tests showed that the properties of Y-69 by mutation were readily inherited. 展开更多
关键词 arachidonic acid mortierella isabellina PROTOPLAST MUTATION
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Cloning and molecular characterization of△^(12)-fatty acid desaturase gene from Mortierella isabellina 被引量:5
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作者 Ming-Chun Li Hang Li Dong-Sheng Wei Lai-Jun Xing 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第21期3373-3379,共7页
AIM: To clone △^12 -fatty acid desaturase gene of Mortierella isabellina and to functionally characterize this gene in vitro and in vivo.METHODS: Reverse transcriptional polymerase chain reaction (RT-PCR) was use... AIM: To clone △^12 -fatty acid desaturase gene of Mortierella isabellina and to functionally characterize this gene in vitro and in vivo.METHODS: Reverse transcriptional polymerase chain reaction (RT-PCR) was used to clone the open reading frame of △^12-fatty acid desaturase gene (D12D) of Mortierella isabellina. Plasmids pEMICL12 and pYMICL12 were constructed with it. pEMICL12 was transformed into Escherichia coli(E.coli) strain BL21 using CaCl2 method for expression after induction with IPTG. pTMICL12 was transformed into Saccharomyces cerevisiae strain IN- VSc1 using lithium acetate method for expression under the induction of galactose. Northern blotting method was used to investigate the effect of temperature on the transcriptional level of this gene in S.cerevisiae strain IN- VSc1.RESULTS: Recombinant plasmids pEMICL12 and pTMICL12 were successfully constructed and transformed into E. coli and S.cerevisiae separately with appropriate method. After induction with IPTG and galactose, it was found that expression of △^12-fatty acid desaturase genes in E.coli and S. cerevisiae under appropriate conditions led to the production of active △^12-fatty acid desaturase, which could convert 17.876% and 17.604% of oleic acid respectively to linoleic acid by GC-MS detection in vitro and in vivo.CONCLUSION: Cloning and expression of M.isabellina D12D gene in E.coli and S.cerevisiae is successfully completed. 展开更多
关键词 mortierella isabellina △^12-fatty acid desaturase In vitro expression
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Mutagenesis of Arachidonic Acid-producing Mortierella Isabellina and Analyses of Δ~6-desaturase Role by qPCR 被引量:1
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作者 Yao Di Yu Chang-qing +1 位作者 Yang Jian Li Li-na 《Journal of Northeast Agricultural University(English Edition)》 CAS 2013年第3期63-70,共8页
Arachidonic acid (AA or ARA), an essential to-6 polyunsaturated fatty acid (PUFA), can be produced by Mortierella isabellina. Mutagenesis on Mortierella isabellina As3.3410 was induced to raise ARA production. The... Arachidonic acid (AA or ARA), an essential to-6 polyunsaturated fatty acid (PUFA), can be produced by Mortierella isabellina. Mutagenesis on Mortierella isabellina As3.3410 was induced to raise ARA production. The mutant strain of YZ-124 had the highest ARA of 4.72 g. L-1, which was 5.5 times higher than that of the original strain 3.3410. mRNA expression level of △ 6- desaturase was determined in five different kinds of ARA-producing Mortierella isabellina after cultured for 7 days, and in the mutant strain YZ-124 over a 3-8 day time-course. In addition, the desaturase activity and ARA content were measured at the selected time points. The lowest expression of △6-desaturase was observed in the original strain and the highest expression in the mutant strain YZ-124, which increased with increasing time in culture. Furthermore, a positive correlation was observed between the expression levels of △6-desaturase and ARA content. Based on this, △6-desaturase played a significant role in ARA synthesis pathway in Mortierella isabellina. 展开更多
关键词 mortierella isabellina △6-desaturases arachidonic acid real-time PCR
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Lipid characterization of an arachidonic acid-rich oil producing fungus Mortierella alpina 被引量:2
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作者 邬文嘉 颜佳铖 +5 位作者 纪晓俊 张鑫 商静生 孙丽娜 任路静 黄和 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第7期1183-1187,共5页
Mortierella alpina has been considered as the most effective producer of arachidonic acid(ARA)-rich oil. It was found that several methods could improve the percentage of ARA in total lipids successfully, as they acti... Mortierella alpina has been considered as the most effective producer of arachidonic acid(ARA)-rich oil. It was found that several methods could improve the percentage of ARA in total lipids successfully, as they activated the desaturation system on the endoplasmic reticulum. Additionally, in M. alpina the ARA exists in several forms, such as triacylglycerol(TAG), and diacylglycerol(DAG). These forms are caused by different acyltransferases and they determine the nutrient value of the microbial oil. However, few works revealed detailed fatty acid distribution among lipid classes, which to some extent impeded the accurate regulation in ARA accumulation. Herein, this paper gives information on the accumulation process of main lipid classes and the changes of fatty acid composition in these lipids during ARA accumulation period in M. alpina. The result demonstrates that TAG was the dominant component of the total lipids, and it is the main form for ARA storage. The ARA enrichment stage occurred during 168–192 h when the amount of total lipids maintained steady. Further analysis indicated that the newly formed ARA-TAG might come from the incorporation and modi fication of saturated and monounsaturated fatty acids in other lipid classes. This work could be helpful for further optimization of ARA-rich TAG production. 展开更多
关键词 Arachidonic acidLipid characterizationTriacylgiycerol mortierella alpina
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深黄被孢霉Mortierella isabelina粉对小鼠LPO、SOD和免疫器官的影响
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作者 林跃鑫 李三暑 +1 位作者 施巧琴 吴松刚 《福建师范大学学报(自然科学版)》 CAS CSCD 2002年第4期69-72,共4页
以昆明种小鼠为对象分别研究了深黄被孢霉粉对小鼠 LPO、SOD、抗疲劳、耐缺氧等生理指标以及对脾脏、胸腺等免疫器官的影响 .昆明种小鼠分组 ,分别灌服深黄被孢霉粉和等量生理盐水 ,每 d 1次 ,1 5d后测定各项生理指标 .结果表明 ,试验... 以昆明种小鼠为对象分别研究了深黄被孢霉粉对小鼠 LPO、SOD、抗疲劳、耐缺氧等生理指标以及对脾脏、胸腺等免疫器官的影响 .昆明种小鼠分组 ,分别灌服深黄被孢霉粉和等量生理盐水 ,每 d 1次 ,1 5d后测定各项生理指标 .结果表明 ,试验组动物血清 LPO含量比对照组下降 0 .8mmol/L ,SOD含量升高 1 87u/ml,抗疲劳时间延长 62 min,耐缺氧能力延长 6min,胸腺指数增加 1 .7%,脾指数增加 5 .6%.结果显示深黄被孢霉粉具有拮抗自由基、延缓衰老、抗疲劳、耐缺氧、抵抗不良环境和增强免疫功能的作用 . 展开更多
关键词 小鼠 LPO SOD 深黄被孢霉 过氧化脂质 超氧化物岐化酶 免疫器官 生理指标 免疫功能 真菌 中药
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深黄被孢霉Mortierella isabellina粉对小鼠抗辐射能力的影响
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作者 林跃鑫 李三暑 +1 位作者 施巧琴 吴松刚 《应用与环境生物学报》 CAS CSCD 2003年第1期89-91,共3页
以昆明种小鼠为对象 ,研究了深黄被孢霉粉对小鼠抗辐射能力的影响作用 .昆明种小鼠灌服深黄被孢霉粉 ,15d后以60 Co照射 ,测定各项指标 .结果表明 ,试验组动物染色体畸变率比对照组下降 7.3% ,细胞畸变率下降 5 .5 3% ,白细胞计数增加 2... 以昆明种小鼠为对象 ,研究了深黄被孢霉粉对小鼠抗辐射能力的影响作用 .昆明种小鼠灌服深黄被孢霉粉 ,15d后以60 Co照射 ,测定各项指标 .结果表明 ,试验组动物染色体畸变率比对照组下降 7.3% ,细胞畸变率下降 5 .5 3% ,白细胞计数增加 2 0 41个 ,生存期显著延长 .试验组动物血清LPO含量明显低于对照组 ,而SOD含量则明显高于对照组 .表 5参 展开更多
关键词 深黄被孢霉粉 抗辐射 畸变 生存期
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高效利用木糖产油的氮离子注入Mortierella alpina诱变选育研究
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作者 张腊梅 袁成凌 +3 位作者 李娟 王鹏 王丽 郑之明 《激光生物学报》 CAS CSCD 2009年第5期673-681,共9页
木糖的有效利用是木质纤维素全利用的基础。为了获得高效利用木糖产油的高山被孢霉菌株,通过多轮氮离子束诱变,筛选出一株有效利用木糖的产油高山被孢霉I502-8(Mortierella alpina I502-8,MAI502-8),并研究了以葡萄糖/木糖(W/W,5/3)组... 木糖的有效利用是木质纤维素全利用的基础。为了获得高效利用木糖产油的高山被孢霉菌株,通过多轮氮离子束诱变,筛选出一株有效利用木糖的产油高山被孢霉I502-8(Mortierella alpina I502-8,MAI502-8),并研究了以葡萄糖/木糖(W/W,5/3)组成的混合糖为碳源,突变株生长和油脂积累的特性。采用单因子和正交实验对培养基组成和发酵条件进行了优化,结果表明,诱变菌在温度28℃,pH 8.0,接种量8%,装液量30%,蛋白胨0.76%和豆粕1%,分批补糖的最优发酵条件下发酵9d,生物量和菌体油脂积累量分别达29.8g/L和11.7g/L,较出发菌提高了2.59倍和2.05倍,同时原料糖利用率达到99.4%。 展开更多
关键词 氮离子注入 高山被孢霉 混合糖 微生物油脂 补料分批发酵
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被孢霉在可持续农业生产中的应用研究进展
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作者 裘智杰 索萌 +1 位作者 王照贝 杨洪岩 《江苏农业学报》 CSCD 北大核心 2024年第4期762-768,共7页
被孢霉是典型的土壤腐生真菌,广泛存在于土壤及植物体内。近期大量研究结果表明,土壤中的被孢霉具有促进植物生长和帮助植物抑制病害的潜力。本文基于被孢霉的分类地位及共性特征,分别从被孢霉降解农业废弃物和有机污染物修复土壤,溶磷... 被孢霉是典型的土壤腐生真菌,广泛存在于土壤及植物体内。近期大量研究结果表明,土壤中的被孢霉具有促进植物生长和帮助植物抑制病害的潜力。本文基于被孢霉的分类地位及共性特征,分别从被孢霉降解农业废弃物和有机污染物修复土壤,溶磷、产铁载体促进土壤营养元素转化,分泌植物激素和脂肪酸类物质促进植物生长,分泌拮抗物质调控根际微生物种群丰度,诱导植物自身防御反应提高植物抗病性等方面总结了被孢霉的研究与应用进展。并且对今后被孢霉在可持续农业生产中的应用前景进行了展望,以期为研制安全、稳定、高效的农业生产中微生物菌剂提供方向,为优化植物促生及抑病策略奠定基础。 展开更多
关键词 被孢霉 土壤改良 促生 抗病 生物防治
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Regio- and stereo-selective hydroxylations of ingenane diterpenoids by Mortierella ramanniana and Gibberella fujikuroi
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作者 WU Yi-Qing CAO Yue +1 位作者 LIU Xin CHENG Zhi-Hong 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2016年第12期939-945,共7页
The regio- and stereo-selective hydroxylations of two ingenane diterpenoids, 20-deoxyingenol(1) and 13-oxyingenol dodecanoat(2), by the filamentous fungi Mortierella ramanniana and Gibberella fujikuroi were investigat... The regio- and stereo-selective hydroxylations of two ingenane diterpenoids, 20-deoxyingenol(1) and 13-oxyingenol dodecanoat(2), by the filamentous fungi Mortierella ramanniana and Gibberella fujikuroi were investigated in the present study. Four undescribed metabolites(3–6) of substrate 1 and two undescribed metabolites(7 and 8) of substrate 2 were isolated. All the lites were identified as hydroxylated ingenane derivatives by extensive NMR and HR-ESI-MS data analyses. All the biotransformed compounds and the substrates were evaluated for their cytotoxicities against three human cancer cell lines, including human colon cancer Caco-2, breast cancer MCF-7, and adriamycin(ADM)-resistant MCF-7/ADM cell lines. All ingenane alcohols(1, and 3–6) displayed no significant cytotoxic activities. The substrate 13-oxyingenol dodecanoat(2) showed moderate cytotoxicity with IC50 values being 35.59 ± 5.37 μmol·L^(-1)(Caco-2), 24.04 ± 4.70 μmol·L^(-1)(MCF-7), and 22.24 ± 5.19 μmol·L^(-1)(MCF-7/ADM). However, metabolites 7 and 8 displayed no significant cytotoxicity. These results indicated that the hydroxylation at the C^(-1)3 aliphatic acid ester of substrate 2 can significantly reduce the cytotoxic activity. 展开更多
关键词 Microbial transformation Mortierelta ramanniana Gibberellafujikuroi DITERPENOID Ingenane HYDROXYLATION
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高山被孢霉NADP^(+)依赖型异柠檬酸脱氢酶的异源表达与活性分析 被引量:1
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作者 王旭旭 孙晓琪 +3 位作者 陈海琴 赵建新 陈卫 唐鑫 《食品与发酵工业》 CAS CSCD 北大核心 2023年第2期13-19,共7页
产油真菌胞质中NADP^(+)依赖型异柠檬酸脱氢酶(isocitrate dehydrogenase,IDH)能够为脂肪酸合成提供还原力,前期研究表明高山被孢霉的异柠檬酸脱氢酶4(Mortierella alpina isocitrate dehydrogenase4,MaIDH4)对脂质积累有积极的影响。... 产油真菌胞质中NADP^(+)依赖型异柠檬酸脱氢酶(isocitrate dehydrogenase,IDH)能够为脂肪酸合成提供还原力,前期研究表明高山被孢霉的异柠檬酸脱氢酶4(Mortierella alpina isocitrate dehydrogenase4,MaIDH4)对脂质积累有积极的影响。为了深入研究MaIDH4的性质,该文将其在大肠杆菌和毕赤酵母系统中分别进行异源表达并纯化,均成功获得纯酶,并考察了不同表达系统对酶活性和产量的影响。首先克隆MaIDH4至表达载体pET28a(+)和pPink-HC-3CZHEK构建重组质粒,然后分别转化至Escherichia coli BL21(DE3)和PichiaPink TM Strain 2进行诱导表达,最后采用镍柱纯化获得携带10×His标签的MaIDH4重组酶,检测纯酶的比活力分别是34.10 U/mg和43.00 U/mg,酶产量分别为10.28 U/L和159.12 U/L。通过纯酶比活力和酶产量分析表明相比于大肠杆菌表达系统,毕赤酵母宿主更适合MaIDH4的异源表达。 展开更多
关键词 高山被孢霉 异柠檬酸脱氢酶 异源表达 酶活性 酶产量
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高山被孢霉低温应激条件下油脂代谢研究
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作者 刘雯茜 王海军 +3 位作者 陈吴西 李德茂 刘秀敏 李军 《粮食与油脂》 北大核心 2023年第8期46-51,共6页
对高山被孢霉在不同温度下的生物量、油脂产量和油脂组成等指标进行研究,并开展了比较代谢组学研究。结果表明:在低温处理(15℃)时,高山被孢霉的生物量和油脂含量均低于常温(25℃)处理。但是,在低温条件下高山被孢霉的极性脂含量提高到... 对高山被孢霉在不同温度下的生物量、油脂产量和油脂组成等指标进行研究,并开展了比较代谢组学研究。结果表明:在低温处理(15℃)时,高山被孢霉的生物量和油脂含量均低于常温(25℃)处理。但是,在低温条件下高山被孢霉的极性脂含量提高到了2.53倍,而且极性脂中的不饱和脂肪酸含量提高到了1.32倍,表明高山被孢霉的低温保护机制启动,大量合成极性脂和不饱和脂肪酸用于抵御低温应激。差异化合物筛选发现其中与油脂合成和降解有关的有10个化合物,与糖酵解(EMP)途径有关的有6个化合物,与氨基酸合成、降解和转运相关的化合物有5个。 展开更多
关键词 高山被孢霉 油脂 代谢组学 中性脂 极性脂
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高山被孢霉产多不饱和脂肪酸发酵条件优化
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作者 贾路遥 卢晓霆 宋遥遥 《中国酿造》 CAS 北大核心 2023年第11期224-229,共6页
以玉米糖为碳源,酵母膏为氮源,以生物量和油脂产量为评价指标,通过单因素试验和正交试验优化高山被孢霉(Mortierella alpina)3.12824发酵条件,并采用气相色谱(GC)分析高山被孢霉油脂的组成。结果表明,最佳发酵条件为玉米糖80.0 g/L、酵... 以玉米糖为碳源,酵母膏为氮源,以生物量和油脂产量为评价指标,通过单因素试验和正交试验优化高山被孢霉(Mortierella alpina)3.12824发酵条件,并采用气相色谱(GC)分析高山被孢霉油脂的组成。结果表明,最佳发酵条件为玉米糖80.0 g/L、酵母膏12.0 g/L、KH_(2)PO43.8 g/L、NaNO33.4 g/L、MgSO4·7H_(2)O 0.5 g/L、装液量200 mL/L、发酵时间7 d、发酵温度25℃、初始pH 6.5。在此优化条件下,高山被孢霉发酵后生物量及油脂产量分别达到26.23 g/L和8.98 g/L。经GC分析高山被孢霉产油脂组成为软脂酸(C_(16:0))、硬脂酸(C_(18:0))、油酸(C_(18:1))、亚油酸(C_(18:2))、十八碳三烯酸(C_(18:3))、花生三烯酸(C_(20:3))、花生四烯酸(C_(20:4))、二十二烷酸(C_(22:0)),其中不饱和脂肪酸C_(18:1)、C_(18:2)、C_(18:3)、C_(20:3)、C_(20:4)的含量分别为17.72%、5.73%、0.75%、5.83%、39.93%,其总含量超过69.00%,多不饱和脂肪酸(C_(18:2)、C_(18:3)、C_(20:3)、C_(20:4))的总含量超过52.00%。 展开更多
关键词 高山被孢霉 玉米糖 发酵条件优化 多不饱和脂肪酸
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半夏内生真菌的初步研究 被引量:5
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作者 苏昊 康冀川 +3 位作者 何劲 曹晋静 莫莉 文庭池 《菌物研究》 CAS 2009年第1期43-47,共5页
从健康无病害的半夏(Pinellia ternate)根、茎、叶和花组织中分离获得内生真菌共计61株,对其进行形态学鉴定后,针对不产孢的菌株,测定了ITSrDNA序列以进行分子鉴定。分离到的内生真菌分别来自11个属,以半知菌为主要群落,其中Hyphomycete... 从健康无病害的半夏(Pinellia ternate)根、茎、叶和花组织中分离获得内生真菌共计61株,对其进行形态学鉴定后,针对不产孢的菌株,测定了ITSrDNA序列以进行分子鉴定。分离到的内生真菌分别来自11个属,以半知菌为主要群落,其中Hyphomycetes,Zygomycetes和Coelomycetes的比例分别为62.2%,18.1%和8.2%;镰刀菌属(Fusarium spp.)是半夏植物中分离率最高(6%)的属,其余主要优势属为Alternaria,Mucor,Epicoccum,Mortierella和Plectosphaerella。研究表明:从半夏球茎组织中分离到的内生真菌数量多于其他组织。 展开更多
关键词 内生真菌 半夏 FUSARIUM ALTERNARIA MUCOR Epicoccum mortierella Plectosphaerella
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深黄被孢霉突变株A35-4产多不饱和脂肪酸发酵条件优化 被引量:2
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作者 刘尚杰 巴敏 +2 位作者 许本波 田志宏 谢伶俐 《湖北农业科学》 北大核心 2013年第8期1920-1923,共4页
以深黄被孢霉(Mortierella isabellina)突变株A35-4为材料,通过单因素试验及正交试验探讨了发酵条件对A35-4产多不饱和脂肪酸的影响。结果表明,突变株A35-4的最佳发酵培养基配方为60 g/L果糖、3 g/L牛肉膏、3 g/L磷酸二氢钾、0.6 g/L Mg... 以深黄被孢霉(Mortierella isabellina)突变株A35-4为材料,通过单因素试验及正交试验探讨了发酵条件对A35-4产多不饱和脂肪酸的影响。结果表明,突变株A35-4的最佳发酵培养基配方为60 g/L果糖、3 g/L牛肉膏、3 g/L磷酸二氢钾、0.6 g/L MgSO4、2.0 g/L柠檬酸钠、1.0 g/L菜子油,初始pH 6.0,先28℃培养4 d,然后20℃培养3 d。 展开更多
关键词 深黄被孢霉(mortierella isabellina) 多不饱和脂肪酸 优化 发酵
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A Research Overview on Arachidonic Acid:Fermentation Regulation and Purification
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作者 顾晓颖 张云娟 李凌飞 《Agricultural Science & Technology》 CAS 2017年第11期2026-2032,共7页
Arachidonic acid (ARA or AA), one of the most important polyunsaturated fatty acids (PUFAs), has various physiological activities and positive effects on human health. ARA production by Mortierella alpina has beco... Arachidonic acid (ARA or AA), one of the most important polyunsaturated fatty acids (PUFAs), has various physiological activities and positive effects on human health. ARA production by Mortierella alpina has become a hot topic in recent years, owing to that it is effective, safe and easy to control. How to improve ARA yield and purification efficiency is important to ARA production in M. alpina. Therefore, in this review, we summarized some methods to improve ARA yield: optimization of culture conditions, mycelium aging technologies and metabolic regulation, and the commonly used methods for ARA isolation and purification, to provide a theoretical basis for ARA production by M. alpina fermentation. 展开更多
关键词 mortierella alpina Arachidonic acid FERMENTATION Metabolic regulation Punhcation
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深黄被孢霉高产脂变株的选育及其发酵的研究 被引量:47
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作者 黄建忠 施巧琴 +3 位作者 周晓兰 林跃鑫 谢必峰 吴松刚 《微生物学通报》 CAS CSCD 北大核心 1998年第4期187-191,共5页
以深黄被孢霉(Mortierellaisabellina)AS3.3410为出发菌株,经紫外线,硫酸二乙酯和亚硝基胍复合诱变处理,选育成功高产脂深黄被抱霉M018变株,其摇瓶培养菌体油脂含量达65.6%,比出发菌株提高133%。60m3罐三级发酵培养菌体油脂... 以深黄被孢霉(Mortierellaisabellina)AS3.3410为出发菌株,经紫外线,硫酸二乙酯和亚硝基胍复合诱变处理,选育成功高产脂深黄被抱霉M018变株,其摇瓶培养菌体油脂含量达65.6%,比出发菌株提高133%。60m3罐三级发酵培养菌体油脂含量高达79.2%,生物量达37.8g/L.气相色谱分析表明变株M018r-亚麻酸的含量比出发菌株提高了53%。连续传代试验表明M018是一稳定的变株。该变株油脂合成的最佳碳源为葡萄糖,最佳氮源为酵母膏,最佳C/N为60:1,中温(25~30℃)适于菌丝生长,低温(15~20℃)适于细胞油脂合成。代谢曲线表明M018变株是在培养基残氮极低时,才开始将葡萄糖大量转化合成油脂。 展开更多
关键词 被孢霉 选育 油脂合成 发酵
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被孢霉对土壤养分有效性和秸秆降解的影响 被引量:65
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作者 宁琪 陈林 +4 位作者 李芳 张丛志 马东豪 蔡泽江 张佳宝 《土壤学报》 CAS CSCD 北大核心 2022年第1期206-217,共12页
腐生真菌被孢霉在富含有机质的土壤中丰度很高,为土壤碳及养分转化的关键微生物成员。然而目前关于土著被孢霉在秸秆分解过程中对土壤养分有效性影响的研究较少。采用常规平板稀释法从长期施用有机肥的红壤和砂姜黑土中分离真菌菌株,将... 腐生真菌被孢霉在富含有机质的土壤中丰度很高,为土壤碳及养分转化的关键微生物成员。然而目前关于土著被孢霉在秸秆分解过程中对土壤养分有效性影响的研究较少。采用常规平板稀释法从长期施用有机肥的红壤和砂姜黑土中分离真菌菌株,将分离得到的菌株序列与基因库(GenBank)中的序列进行比较,鉴定出了两株被孢霉菌株,即高山被孢霉(Mortierella alpina)和长孢被孢霉(Mortierella elongata)。通过设置盆栽试验,每盆土接种10 g菌剂,研究两株被孢霉对秸秆降解过程中土壤养分有效性和细菌群落的影响。结果表明,在红壤中,与未接种对照相比,接种高山被孢霉处理的土壤有效磷含量提高了29.0%,长孢被孢霉处理下土壤有效氮含量和β-葡萄糖苷酶活性分别提高了15.5%和81.3%。在砂姜黑土中,与对照相比,被孢霉菌株显著提高了土壤可溶性有机碳,速效氮和有效磷的含量以及β-葡萄糖苷酶和磷酸酶的活性。两株被孢霉在红壤中抑制了秸秆的降解,并显著改变细菌群落组成。而在砂姜黑土中,被孢霉菌株促进了秸秆降解,且对细菌群落结构影响不大。在红壤中,苍白杆菌属(Ochrobactrum)、无色杆菌属(Achromobacter)和链霉菌属(Streptomyces)是导致接种处理和对照之间细菌群落差异贡献最大的类群。本研究为土著被孢霉在农业土壤中秸秆分解和养分转化中的作用提供了理论依据。 展开更多
关键词 被孢霉 秸秆降解 土壤肥力 细菌群落 红壤 砂姜黑土
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