67 results about "Mortierella bainieri" patented technology

The invention provides a technology for preparing grease containing rich polyunsaturated fatty acid by taking lignocellulose type agricultural and forest wastes as raw materials through fermenting mortierella alpine, aiming at the problems in the prior art. The technology comprises the steps of pre-treating, saccharifying, carrying out mortierella alpine fermentation, extracting the grease and thelike. According to the technology provided by the invention, a fermentation phase of the mortierella alpine adopts a temperature gradual reduction method and the yield of ARA (Arachidonic Acid) can be remarkably improved; the ratio of the ARA in the total grease can reach 48 percent. Compared with the prior art, the technology adopts a cellulose preparation based on fiber-production globule bacteria to realize the saccharifying of lignocellulose, so that the cost of a carbon source and the enzyme utilization cost of a saccharifying phase are remarkably reduced; the cellulose saccharifying efficiency is 80 to 90 percent. Furthermore, a culture medium at a lignocellulose saccharifying phase and a fermentation culture medium in the technology can be circularly utilized, so that water can beremarkably reduced and the dosage of chemicals also can be remarkably reduced; the technology has remarkable effects of reducing wastewater emission and reducing the cost.

The invention relates to a new separated bacterial strain of mortierella alpine (Mortierella Alpina) and an application thereof. Particularly, the invention relates to CGMCC No.6254, offspring thereof, culture and/or mutant strain and a method and application in preparing arachidonic acid by using the bacterial strain, offspring thereof, culture and/or mutant strain. The separated bacterial strain is a natural bacterial strain, and can stably produce arachidonic acid with a yield as high as 14.32g/L.

The invention relates to a method for promoting production of mortierella alpina and oil yield of arachidonic acid. The method comprises the following steps that fermented clear liquid of the mortierella alpina is collected, and through extraction and concentration of hydrophilic organic solvent, an accelerating agent which can adjust and control the production of the mortierella alpine and the oil yield of the arachidonic aicd is obtained by screening; and in the 0-48 hours at the early stage of fermentation, the accelerating agent is added to a normal medium according to the ratio of 0.1-0.5%, and a conditioned medium is prepared to inoculate and cultured at the temperature of 28 DEG C. After the fermentation, in fermentation results of some embodiments, biomass is 43.2 g/L, oil content is 61.3%, ARA content is 60.7%, ARA yield is 16.1 g/L, and the fermentation period is shortened from 192 hours to 168 hours. The method for promoting the production of the mortierella alpina and the oil yield of the arachidonic acid is simple and effective, promotes the production of the mortierella alpine, improves the oil yield of the arachidonic acid, and is of great significance to industrial application.

The invention provides a mortierella alpina 0901, and an application and microbial inoculums thereof, and belongs to the technical field of microbial inocula. The Latin name of the mortierella alpina0901 is Mortierella alpina, the mortierella alpina is preserved in China General Microbiological Culture Collection Center, and the preservation number is CGMCC No.17791. The mortierella alpina can obviously improve conversion of soil nitrogen, promote nitrogen absorption of plants and improve biomass of plants. The content of indoleacetic acid in maize root systems at a seedling stage is increased by 70% and the biomass of overground parts of maize is increased by 33%, which indicated that mortierella alpina directly promotes crop growth. The content of abscisic acid in root systems is closely related to drought resistance, salt resistance and the like of crops, and the content of the abscisic acid is increased by 36%. Elongation of root systems is promoted, nutrient absorption of the root systems is promoted, the content of nitrogen, phosphorus and potassium in plants is improved, and the yield of crops is increased by 23%.

The invention relates to a recombinant Mortierella alpine strain GPD-1 overexpressing G3PD1 and a construction method. According to the invention, uracil-auxotrophic Mortierella alpine MAU1 is used as a material, Agrobacterium tumefaciens is used for mediation, and a G3PD1-overexpressing recombinant strain with obviously increased lipid content is obtained. Compared with wild Mortierella alpine, the total lipid content of the strain provided in the invention is increased by about 50%, and the transcription amount of G3PD1 is increased by about 2 times; so theoretical and application foundations are laid for subsequent industrial application.

The invention discloses a Mortierella alpina mutant strain capable of producing high-yield arachidonic acid, and a fermentation method and application thereof. The naturally screened Mortierella alpina is mutagenized to obtain a Mortierella alpina mutant strain 200012201-12-2-2, CCTCC NO:M2013392 capable of producing high-yield arachidonic acid. After the strain is subjected to long-term transformation, the hereditary characters are stable and are not mutated, the biological characteristics are typical, and the growth traits are good in a microscopy and fermentation tank, and the strain has the advantages of high C and N utilization ratio, high biomass, high oil production level, high ARA yield and good quality, and can easily extract grease and required fatty acids; and by using the fermentation method, the yield of arachidonic acid is 15.1g/L fermentation liquid.

The invention relates to a method for producing ARA grease rich in chrome. Glucose and yeast powder rich in chrome are taken as the raw materials, the method comprises steps of fermenting mortierella alpina so as to obtain the ARA fermentation liquid rich in chrome, filtering and separating so as to obtain ARA wet thallus rich in chrome, drying then extracting through organic solvent so as to obtain crude oil, hydrating, alkali refining, decoloring and deodorizing the obtained crude oil so as to obtain the ARA grease rich in chrome. The nutrient grease can be used for lowering blood fat and preventing diabetic complication, and is good news for diabetics.

The invention relates to the technical field of microorganisms, and discloses microbial oil rich in Sn-2-site ARA as well as a preparation method and application of the microbial oil. The proportion of ARA at the Sn-2 site of triglyceride in the microbial oil is not lower than 23%. The preparation method of the microbial oil comprises the step of inoculating a fermentation medium with a mortierella alpina strain for fermentation to obtain the microbial oil, wherein the mortierella alpina strain has preservation number of GDMCC No.60734. The proportion of the ARA at the Sn-2 site of the triglyceride in the microbial oil is remarkably higher than that of the ARA at the Sn-1 site and the Sn-3 site of the triglyceride, so that the human body absorption rate of the ARA in the microbial oil is remarkably higher than that of the ARA produced by a conventional strain, and absorption and utilization of the functional fatty acid ARA by a human body are promoted.

The invention relates to a method for extracting grease contained in mortierella alpine. The method comprises the following steps: (1), inoculating mortierella alpine strains into a liquid culture medium for fermentation to obtain fermentation liquor; (2), performing filtering to obtain mortierella alpine wet cells, dissolving the mortierella alpine wet cells in a sodium chloride solution to obtain a mortierella alpine cell solution, then performing emulsifying and shearing, and adjusting the temperature to 40-60 DEG C; (3), adjusting the pH value of the mortierella alpine cell solution to 6.5-7.5, adding an autolysis inducer, continuously performing stirring, and autolyzing mortierella alpine cells for 8-12 hours in a vacuum oxygen-free environment to obtain a mortierella alpine autolysis solution; (4), carrying out centrifugal separation, and collecting upper-layer grease; (5), collecting lower-layer solid obtained by centrifugal separation in the step (4), uniformly mixing the lower-layer solid with purified water, performing centrifugal separation, and collecting upper-layer grease; and (6), mixing the upper-layer grease collected in the steps (4) and (5). The method can effectively extract the grease in mortierella alpine cells, has the advantages of simple technique and low energy consumption, and is beneficial to implementing large-scale production.

The invention discloses a preparation method for mortierella alpina protoplast. An enzymatic hydrolysate consists of active enzyme, an osmotic pressure stabilizing agent and water, wherein the active enzyme comprises the following components according to mixing ratio: 300-375 U/ml cellulase, 15-20 mg/ml helicase and 2500-5000 U/ml lysozyme. The preparation method comprises the following steps: inoculating activated mortierella alpina into a liquid medium, shaking culturing, collecting mycelium, and washing to be clean; adding the sterile enzymatic hydrolysate into mycelium, conducting full enzymolysis, removing mycelium scraps, collecting, and washing, so as to obtain the protoplast. The enzymatic hydrolysate can efficiently conduct enzymolysis on the cell wall of the mycelium of the mortierella alpina, so that the high-quality mortierella alpina protoplast can be prepared, and the yield of the protoplast can reach 5.5*10<7> per millilitre.

The invention discloses a cane sugar non-fermentation type protein kinase regulatory subunit and an application thereof, and belongs to the technical fields of genetic engineering and microorganism engineering. The cane sugar non-fermentation type protein kinase regulatory subunit of which the amino acid sequence is shown as SEQID No.1 has the function of responding extracellular nutrient level and adjusting and controlling lipid metabolism, and participates in response of thalli to extracellular glucose level. The gene has the negative regulation functions on growth and lipid accumulation, and can supply energy for the thalli by restraining growth of mountain mortierella and strengthening catabolism of fatty acids under the action of limitation by glucose.

The invention provides a method for producing arachidonic acid by fermentation of mortierella alpine, which uses rapeseed meal or rapeseed meal hydrolysate as a main component of a fermentation mediumto ferment and culture the mortierella alpine. According to the fermentation method, the production cost of arachidonic acid is reduced, and the yield of arachidonic acid is increased.