KR20010057523A - Liquid Culture Method of Pine Mushroom Mycellium - Google Patents

Abstract

PURPOSE: Provided is a method for liquid-culturing mycelium of pine mushroom to grow mycelium faster with sustaining original flavor of pine mushroom than in solid media. CONSTITUTION: The method for liquid-culturing mycelium of pine mushroom is characterized by the next steps of: i) mixing extracts of broad-leaved tree with extracts of pine tree in a ratio of 3:7 and adding medium ingredients to the mixture to make medium of pH 5-8; ii) inoculating mycelium of pine mushroom into the medium and cultivating the mycelium for 2-10 days; iii) inoculating the mycelium into liquid medium including the same ingredients as those of the medium of the step (ii) and agitating the medium at 20-35 deg.C for 2-6 days in the dark; and iv) culturing the mycelium in medium including the same ingredients as those of the medium of step (iii) for 4-10 days.

Description

Liquid Culture Method of Pine Mushroom Mycellium

The present invention relates to a liquid culture method of pine mycelium, and more particularly, to a liquid culture method capable of rapidly mass-producing high quality pine mycelium having a unique flavor of wild pine.

Mushrooms are microorganisms belonging to basidiomycetes in botany. Mushrooms have been widely used in Korea as a food of Buljangjang, which has a unique aroma and taste. Among them, pine mushroom is an edible mushroom that is known as a high-nutrition food with a higher content of essential amino acids than the meat or vegetables.

In general, in order to artificially cultivate matsutake mushrooms, the mycelium, which is the secondary mycelia of the clusters corresponding to seeds, is used. The mycelium used for cultivation of mushrooms should be easily decomposed by mushroom mycelium so that the mycelial growth rate is fast and the adaptability to cultivation medium should be excellent. Most of the mycelia currently in use were developed at the early stage of the introduction of artificial cultivation technology, using solid media such as spawn and sawdust spawn. Seedlings are removed from wood where mushroom mycelia are infested and inserted into logs. Mushroom mycelia erode the logs, and when mushrooms are produced, they are collected and edible. To date, various additives have been used for mushroom cultivation. .

Sawdust spawn is the most commonly used spawn for mushroom cultivation, and is used as mushroom spawn by adding various nutrients to sawdust.

In addition, pulverulent spawn collected from wild and grown in compost medium box, manure of livestock mixed with block spawn inoculated with mycelium fragment, inoculated with mycelium fragment, and mycelia separated from fruiting body or mycelium of mushroom Pure cultured seedlings inoculated into bottles are known.

To date, the spawns used for the cultivation of mushrooms are generally a mixture of sawdust and bran, sterilized in a polypropylene pot as a spawn medium, inoculated with mycelium grown on an agar plate and over several days at the optimum temperature for growth. The mycelium was pulled and used for the cultivation of mushrooms.

However, the production of spawns in this way requires not only a huge spawn production facility, but also entails heat loss and other labor costs for the optimal temperature maintenance for long-term culture, and overhead costs for transportation. There was a risk of contamination.

In addition, the method of cultivating a solid spawn is to first isolate the tissue of the mushroom or mycelium first and incubate it in a test tube, then incubate in a medium to be used as an inoculum, and then inoculate into a spawn medium and use it as a spawn for mushroom cultivation. is average. That is, in order to obtain a solid spawn, at least four pass passages must be passed. In the process, the force of the fungus is weakened, and the productivity of the pine mushroom, the final product, is not very high.

In addition, in recent years, due to the long period of incubation of the fruiting body of the mushroom is limited production and requires a lot of space, the use of the mushroom mycelium, which is not inferior in nutrition and efficacy in comparison with the mushroom fruiting body, i. Therefore, a method of cultivating cluster mycelium in a liquid state has been attempted.

However, the mycelium mycelium produced by the liquid culture method of the conventional pine mycelium may have a high yield, but there is a disadvantage in that there is no inherent odor such as wild pine.

Therefore, the present inventors have completed the present invention by developing a method capable of cultivating a large number of rapidly growing pine mycelium while maintaining the inherent aroma of wild pine, as a result of studying to solve all problems of the conventional pine mycelium. It became.

Accordingly, an object of the present invention is to provide a liquid culturing method capable of producing cluster mycelium retaining the flavor of natural pine.

Another object of the present invention is to provide a liquid culturing method capable of rapidly obtaining a mass of mycelium mycelium having a natural pine odor.

In order to achieve the above object, the liquid culture method of the pine mycelium of the present invention is a high pressure by adjusting the pH to 5 to 8 after putting the synthetic medium component in the extract mixture of the mixed hardwood extract and pine extract in a ratio of 3: 7 Aseptically inoculating the cluster mycelium on sterile plate medium for 2 to 10 days incubation; Sterilely inoculating the precultured mycelium on a liquid medium of the same component as the preculture medium, followed by cancer culture while stirring and aeration for 2 to 6 days at 20 to 35 ° C .; And aeration culture for 4 to 10 days in the same medium as the cancer culture step.

In the liquid culture method of the pine mycelium according to the present invention, the hardwood extract may be an extract of a stem of one or more species which are generally available, such as oak and mulberry. The hardwood extract may be used as an extract using water as a solvent, but it is preferable to use an extract that is heated by cutting the hardwood stem to a constant size and heated with water vapor of 100 ° C. or more for about 10 minutes to 1 hour.

In the liquid culture method of pine mycelium according to the present invention, any pine extract can be used as an extract using water as a solvent, by cutting the pine trunk to a constant size or the leaves 10 minutes to 1 with water vapor of 100 ℃ or more It is preferable to use the extraction liquid which heated for about time and flowed out.

In the liquid culture method of pine mycelium according to the present invention, any synthetic medium used as a medium can be used as long as it is generally used as a liquid medium, for example, GPM, GA, Oyster-mushroom Culture , Oak-mushroom culture, PG, MYG and the like can be used, oyster-mushroom medium, oak-mushroom medium is preferred, and oak-mushroom medium is particularly preferred.

In the liquid culture method of the pine mushroom according to the present invention, it is preferable to add about 0.1 to 0.5% by weight of the silk peptide to the culture solution, in which case it was confirmed that the growth proceeds faster. Silk peptide is a powder of cocoon and contains a large amount of amino acid-based nutrients, and has been mainly used as a dietary agent for diabetics.

Silk peptides used in the preferred liquid culture method of the pine mushroom according to the present invention can be purchased commercially available.

The mycelium mycelium obtained according to the present invention can be used for cultivating the pine fruit body by spraying as it is in a liquid state or by spraying in a dry state from which the medium component is removed.

Pine mycelium obtained according to the present invention can be used for edible or medicinal mycelium itself or dried, it can be used to prepare a variety of food microbiological or food engineering.

The pine mushroom cultivated by spraying the pine mushroom mycelium obtained according to the present invention was confirmed by the test that the production is much higher than that of the conventional cultivated pine mushroom, as well as the natural scent in terms of quality and aroma. .

Hereinafter, the liquid culture method of Matsutake mushroom according to the present invention will be described in more detail with reference to the following examples.

Examples 1-9

(1) Preparation of Matsutake Mushroom Tissue: The isolates from fresh fresh tissue of Matsutake mushroom were used.

(2) Preparation of extract mixture: oak and mulberry stems were cut and put in the same amount into a high-pressure sterilizer and heated by steam at about 150 ° C. for about 40 minutes to collect the hardwood extract. In addition, the pine trunks were cut and put into an autoclave and heated with steam at about 150 ° C. for about 40 minutes to collect pine extracts. These two extracts were mixed at a ratio of 3: 7 to form an extract mixture.

(3) Media Preparation: 1 l of the extract mixture was added to the liquid medium of the composition shown in Table 1 to adjust the pH to about 5, and sterilized to prepare a liquid medium for liquid culture of the pine mushroom of the present invention. The plate medium to be used in the pre-cultivation step was prepared by sterilization by adjusting the pH to about 5 by adding the medium and agar of the composition of Table 1 to 1 l of the extract mixture.

(4) Pre-stage culture: Aseptically inoculated the cluster mycelium on a plate medium containing the extract mixture solution and incubated at about 22.5 ° C. for about 7 days to visually check the activity of the cluster mycelium. It was further cultured.

(5) Cancer culture step: The activated cluster mycelia were inoculated in the liquid medium according to the present invention prepared above, and stirred at about 22.5 ° C. and cultured for about 2 days with aeration at 1.5vvm.

(6) Main culture step: The cultured mycelium was incubated for about 6 days while ventilated at 1.5vvm at about 22.5 ℃ in the liquid medium.

The resultant of collecting the cluster mycelium thus obtained and measuring the dry weight is shown in Table 2 below.

Badge Name Liquid medium composition With agar additives on flat plate Example 1 Modified Hamada Glucose (10 g), Yeast (5 g), KH ₂ PO ₄ (1 g), MgSO ₄ 7H ₂ O (0.5 g) 20 g Example 2 GPM Glucose (20g), Peptone (1g), Malt Extract (20g) 20 g Example 3 GA Glucose (10 g), ammonium tartarate (1 g), KH ₂ PO ₄ (1 g), iron (II) citrate (5 mg), ZnSO ₄ 7H ₂ O (4.4 mg), MnSO ₄ 4H ₂ O (5 mg ), CaCl ₂ · 2H ₂ O (55.5 mg), vitamin B ₁ (10 mg), nicotinic acid (10 mg) 20 g Example 4 Oyster-mushroomCulture Sulfur Sugar (30g), Yeast Extract (3.0g), KH ₂ PO ₄ (1g), MgSO ₄ · 7H ₂ O (1g) 20 g Example 5 Czapex-dox Sucrose (30 g), NaNO ₃ (2.0 g), K ₂ HPO ₄ (1 g), MgSO ₄ 7H ₂ O (0.5 g), FeSO ₄ · 7H ₂ O (0.01 g) 20 g Example 6 MYG Malt extract (5g), yeast extract (5g), glucose (20g) 20 g Example 7 Oak-mushroom Culture Glucose (50 g), peptone (2.5 g), yeast extract (2.5 g), KH ₂ PO ₄ (1 g), MgSO ₄ 7H ₂ O (0.5 g), CaCl ₂ · 2H ₂ O (0.5 g), FeSO ₄ 6H ₂ O (10 mg), MnCl ₂ · 4H ₂ O (7.2 mg), ZnCl ₂ (4 mg), CuSO ₄ · 5H ₂ O (1 mg) 20 g Example 8 Lyophyllum-mushroom Culture Glucose (20 g), L-valine (1.1 g), KH ₂ PO ₄ (0.1 g), MgSO ₄ 7H ₂ O (0.1 g), ZnSO ₄ 7H ₂ O (1.0 mg), FeSO ₄ 7H ₂ O ( 1.0 mg), CuSO ₄ · 5H ₂ O (0.2 mg), MnCl ₂ · 5H ₂ O (0.2 mg), nicotinic acid (0.1 mg), thiamine (0.2 mg) 20 g Example 9 PG Glucose (30 g), Peptone (6 g), KH ₂ PO ₄ (0.5 g), MgSO ₄ · 7H ₂ O (0.5 g), CaCl ₂ · 2H ₂ O (0.1 g), FeSO ₄ · 6H ₂ O (10 mg) , MnCl ₂ · 4H ₂ O (3 mg), ZnCl ₂ (3 mg), CuSO ₄ · 5H ₂ O (1 mg), thiamine (10 mg), MoO ₃ · H ₂ O (3 mg) 20 g

(6) Sensory experiment on pine scent

A panel test was carried out against 20 investigators of the pineal mycelium obtained in Examples 1 to 9 above. In Table 3, the results of natural scent of pine was evaluated as a grade from 0 to 10 with a scent of 0 and no scent of pine. As a control, the experiment was carried out on the pine mycelium cultured in the same medium and growth conditions.

Examples 10 to 18

Medium conditions were the same composition as in Examples 1 to 9, but additionally added 1.5 g of silk peptide to the medium was tested under the same conditions. The dry weight of the resultant cluster mycelium is shown in Table 2 below.

Dry weight (mg / 40ml) Dry weight (mg / 40ml) Example 1 24.0 Example 10 27.7 Example 2 18.3 Example 11 28.3 Example 3 20.2 Example 12 23.8 Example 4 28.8 Example 13 37.0 Example 5 16.0 Example 14 19.4 Example 6 26.6 Example 15 29.0 Example 7 42.4 Example 16 49.8 Example 8 24.0 Example 17 33.8 Example 9 25.0 Example 18 35.8

Evaluation value (average value) Evaluation value (mean value) for the control group Example 1 9 0 Example 2 8 2 Example 3 9 0 Example 4 8 0 Example 5 8 0 Example 6 9 3 Example 7 7 0 Example 8 9 0 Example 9 8 0

According to the liquid cultivation method of pine mycelium according to the present invention, as confirmed from Table 2, it is possible to produce a large number of pine mycelium, especially oyster-mushroom medium, oak-mushroom medium is more robust growth of the pine mycelium It can be seen that. In addition, it can be confirmed that the growth of mycelia is more active when silk peptide is added.

From Table 3, it can be confirmed that the pine mycelium obtained according to the liquid culture method of pine mycelium according to the present invention has a natural pine scent as it is, unlike conventionally cultured pine mycelium.

As described above, the liquid culture method of pine mycelium according to the present invention is very vigorous mycelium growth compared to the method of culturing in a solid medium or a liquid medium, as well as to obtain a pine mycelium in large quantities quickly, It retains the scent of natural clusters.

Claims (6)

Synthetic medium component was added to the extract mixture mixture of hardwood and pine extracts in a ratio of 3: 7, and then the pH was adjusted to 5 to 8 to aseptically inoculate cluster mycelium on autoclaved plate medium for 2 to 10 days. Preculture; Sterilely inoculating the precultured mycelium on a liquid medium of the same component as the preculture medium, followed by cancer culture while stirring and aeration for 2 to 6 days at 20 to 35 ° C .; And aeration culture for 4 to 10 days in the same medium as the cancer culture step. The method of claim 1, The medium further comprises 0.1 to 0.5% by weight of the silk peptide. The method according to claim 1 or 2, The hardwood extract is characterized in that extracted from oak, mulberry or a mixture thereof. The method according to claim 1 or 2, The hardwood extract or pine extract is a method characterized in that the extract is extracted by heating the stem by cutting the stem to a predetermined size for 10 minutes to 1 hour or more with steam or more. The method according to claim 1 or 2, The synthetic medium is characterized in that the oyster-mushroom medium or oak-mushroom medium. The method according to claim 1 or 2, The synthetic medium is characterized in that the oak-mushroom medium.