Initiation of Basidioma Formation of Rare and Medicinal Macromycetes in Pure Culture

Unclear conditions for the formation of basidiomas as the reason for the small number of species of fungi that can be grown in industrial culture. Features of the initiation of the formation of basidiomas of medicinal macromycetes in a pure culture.

Рубрика Биология и естествознание
Вид статья
Язык английский
Дата добавления 16.04.2020
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Initiation of Basidioma Formation of Rare and Medicinal Macromycetes in Pure Culture

culture basidioma medicinal

More than 5000 species of Ascomycetes and Agaricales fungi are known nowadays. However, 30 species of them are intensively cultivated and have been used into the agriculture. One of the reasons of a small number of species that can be grown in industrial culture are unclear conditions for the basidiomes formation. Basidiomes and mycelium include various nutritional substances that are used in food, medicine, cosmetics, etc. Recently, the biosynthesis of fungal biologically active substances with immunomodulation, radioprotective, antitumor, antiviral and other properties is under investigation by many scientists. Only 15 % of all products of medical mushrooms are made from extracts of mycelium. Verification of conditions of mushroom cultivation will significantly expand the range of species that could serve as a potential object for biotechnology.

29 species of macromycetes from the pure Cultures Collection of Fungi (FCKU) of Educational and Scientific Centre «Institute of Biology and Medicine» Taras Shevchenko National University of Kyiv were used in our experiment. The initiation basidiomes formation of 29 macromycetes on different substrates in pure culture was studied. The optimal substrate for the studied species was husk of sunflower seeds. Most fungi formed basidiomes on it. If mushrooms did not formed basidiomes on this substrate, they fastest it overgrown or developed primordia or sclerotium-shaped structures. The shaping of the basidiomes, primordia or sclerotia- shaped structures was observed in 28 species. Three of these species were listed in the Red Book of Ukraine (Grifola frondosa, Leucoagaricus barsii, Sparassis crispa) and others rare species for Ukraine (Ceriporia viridans, Hericium cirrhatum, Sarcodontia crocea, Sparassis laminosa).

More than 5000 species of Ascomycetes and Agaricales fungi are known nowadays. Only approximately 2,000 species are considered edible (Lakhanpal, Rana, 2005). However, 30 species of them are intensively grown and have been entered into the culture (Akata et al., 2012; Buchalo, 1988; Krupodorova et al., 2012).

Basidiomes and mycelium include various nutritional substances that are used in food, medicine, cosmetics, etc. (Ikekawa et al., 2004; Gao et al., 2005; Carvaja et al.l, 2012). Medical properties were described for many macromycetes (Dovgiy et al., 2013; Krupodorova et al., 2012; Solomko, Lomberg, 2005; Wasser, 2010). Recently, the biosynthesis of fungal biologically active substances with immunomodulation, radioprotective, antitumor, antiviral and other properties is an investigation by many scientists (Engler, 1998; Takaku et al., 2001; Zjawiony 2004; Mariga et al., Vaz et al., 2010; Jeena et al., 2014). The medicinal mushrooms products derived from basidiomes have been commercially grown or pick up from the wild. Only 15 % of all products of medical mushrooms are made from extracts of mycelium (Lindequist et al., 2005). However, in our opinion, almost all mushrooms may be medical, but we don't know it precisely yet.

Now scientists are studying intensely fungi but their special interest is an investigation of mycorrhizal fungi (Sanmee et al., 2010; Akata et al., 2012; Endo et al., 2014). One of the reasons a small number of species that can be grown in industrial culture are unclear conditions for the basidioma formation. Verification of conditions mushrooms cultivation will significantly expand the range of species that could be a potential object for biotechnology. So, the study of the mushrooms basidiomes formation in culture is important in many aspects. The purpose of our work was the initiation of basidioma formation of rare and medical mushrooms in culture.

Materials and Methods

The 29 species of macromycetes from the pure Cultures Collection of Fungi (FCKU) of Educational and Scientific Centre Institute of «Biology and Medicine» Taras Shevchenko National University of Kyiv have used in our experiment (tab.1). Collection FCKU was registered in the World Federation of Cultures collections and includes 51 species: 19 species of them are edible, 5 - inedible, 1 - poisonous, 4 - included in the Red Data Book of Ukraine (2009) and 4 are rare species that need additional protection.

Species names were agreed according to the current names in the International Database of Mushrooms. The cultures are stored in test tubes with a potato-glucose agar medium (PGA) in an equipped room, 4-8 °C temperature. We used different nutrient media, substrates and substrates combinations for the basidiomes formation.

The nutrient media are potato-glucose agar medium (PGA) and liquid potato-glucose nutrient medium (PG).

The substrates are husks of pumpkin, husk of sunflower seeds, boiled wheat grains, pine sawdust, ground coffee beans.

The substrate combinations are mixtures of ground coffee beans and husk of sunflower seeds, a mix of pine sawdust with husk of sunflower seeds, a mix of a husk of sunflower seeds with sawdust of hardwoods.

50g substrates have put into 250 ml Erlenmeyer flask or flat-bottomed round flask. Each flask with substrates was filled with 50 ml of water. The moisture content of the solid media was adjusted to 65 % (w/w) on a wet basis. 50 g of the liquid potato-glucose nutrient medium have poured into 250 ml flat-bottomed round flask. All nutrient media, substrates and substrate combinations were prepared according to generally accepted methods and were autoclaved at 120°C for 30 min. (Buchalo, 1988; Ohta and Fujiwara, 2003).

Mycelia agar-plugs (3-5 mm diam.) cut from the periphery of the growing colony and were put to flasks with nutrient media, substrates and substrate combinations. After then, inoculated flasks were incubated in darkness at an optimal temperature for mycelium growing of these species. When the surface of the medium was covered by mycelium, incubation conditions were changed to daylight with temperature to 16-18°C for fruit body formation. Maximum light intensity was 1600-2000 lux daily.

The Thiamine (Vitamin B1) (0,25 mg added to each flask) or selenium (Se) (0,125 g in each flask) have put in some substrates for initiation basidiomes formation. The beginning of basidiomes formation was determined of primordium appearance.

Same basidiomes of studying mushrooms have formed spores that were checking by microscope. We used statistical analysis to test our data. The entire process was repeated with five replicates.

Results

The investigated species of fungi, their location source and the success of basidiomes formation in vitro are shown in table 1.

Table 1

Note. Edibility: E - edible species, N - inedible species, O - poisonous species; Rarity: R - rare species, RB - species listed in the Red Data Book of Ukraine; Successful fruit formation: SS - species that formed primordia or sklerotium-shaped structures, F- species, which formed basidiomes in a pure culture, N - species that did not form basidiomes.

Primarily, all of investigated species have and PG. The time (days) for overgrowth of the

basidiomes formation on the three type of substrate by mycelium, appearance of primordia

substrates such as husk of sunflower seeds, PGA and basidiomes of all species are shown in table 2.

Fouling Substrate and Basidiomes Formation of Studied Species (Days)

Table 2

Fig. 1. Primordium and Sclerotium-Shaped Structure of Macromycetes in Culture. Primordia of Lentinus Tigrinus (A), Polyporus Squamosus (E), Hypholoma Sublateritium (B). Sclerotium-Shaped Structure of Mutinus Caninus (C), Chondrostereum Purpureum (D), Oudemansiella Radicata (F), Morchella Steppicola (G) and Hyphae Sclerotium-Shaped Structure on a Scanning Electron Microscope (H)

Fig. 2. Basidiomes Formation of Lentinus Tigrinus (A), Sparassis Laminosa (B), Oudemansiella Longipes (C), Pycnoporus Cinnabarinus (D), Grifola Frondosa (E), and Sarcodontia Crocea (F) on Husk of Sunflower Seeds

Fig. 3. Generation of Sporocarps After Additional Coverage By Soil and Additional Moisture by Marasmius Scorodonius (A) and Leucoagaricus Barsii (C). Basidiomes Formation by Grifola Frondosa (B), Hericium Cirrhatum (D) on Liquid Medium (PG); Ascocoryne Sarcoides (E), Hericium Cirrhatum (F) on PGA

M. scorodonius formed brown basidiomes with a stem of 4-5 cm length and cap of 1 cm diameter (fig. 3 A). Also, this fungus had a garlic smell which inherent in these species. Some macromy- cetes generated sporocarps after additional cove¬rage by soil and added moistures (fig. 3 A and C). Several species developed basidiomes on liquid medium PG or PGA (fig. 3 B, D, E, F).

H. cirrhatum formed basidiomes on all type of tested media. The basidiomes look likes a white colour plate on a liquid nutrient medium and husk

I. of sunflower seeds substrate. Also, this plate was twisted at the ends and formed small spines in the center of the plate (fig. 3 D). basidiomes on PGA had the form elongated strands with white color spines (fig. 3 F).

J. The ten of twenty-nine studied species don't form basidiomes.

K. The basidiomes formation of rare macromycetes S. laminosa and G. frondosa was investigated in different substrates more details (table 3).

The coffee beans substrate was the fastest covered by mycelium of S. laminosa and G. frondosa through 4 and 12 days respectively. However, on this substrate, S. laminosa and G. frondosa did not form primordia and basidiomes. Although S. laminosa and G. frondosa slowly overgrown substrates, but basidiomes formed at the faster on husk of sunflower seeds.

The only suitable substrate for fruiting S. laminosa was a mix of pine sawdust and husk of sunflower seeds. However, the basisiomes formation takes a long time (80 days) on a mix of pine sawdust with husk of sunflower seeds.

The favorable substrates for basidiomes formation by G. frondosa were pumpkin seed husks and a mix of hardwood sawdust and husk of sunflower seeds. Its basidiomes were as small bushes that were initially white, later becoming brown at all types of substrate. The largest number of basidiomes of G. frondosa was formed on a mix of pine sawdust with husk of sunflower seeds, but they were very small. Large basidiomes are formed on a mix of milled coffee beans with husk of sunflower seeds.

The effect of Thiamine (Vitamin B1) on the basidiomes formation was tested on S. laminosa. Vitamin B1 accelerated fouling substrate mycelium (10 ± 1,5 days) and the mass of basidiomes. The term of basidiomes formation was 9 ± 1,3 days.

The added Selenium in each of the flasks with husk of sunflower seeds did not affect on the basidiomes formation of Mutinus caninus (Huds.) Fr., but speeded up fouling substrate by mycelium (average 9 ± 2,0 days).

Discussion

As a result screening of 29 macromycetes species on the ability to produce basidiomes in pure culture, the capacity of 28 of them was installed, including possibility to form primordia or sclerotium-shaped structures. Basidiomes were obtained in three species, which are included in the Red Data Book of Ukraine (G. frondosa, L. barsii, S. crispa) and four rare species (Ceriporia viridans (Berk. & Broome) Donk, H. cirrhatum, S. crocea, S. laminosa) in pure culture.

The good substrate for the studied species appeared husk of sunflower seeds. Most fungi formed basidiomes on it. If mushrooms are not formed basidiomes on this substrate, they fastest it overgrown or developed primordia or sclerotium- shaped structures.

There is the positive effect of Vitamin B1 on the indicators of the basidiomes formation for example S. laminosa. The species that formed primordia or sclerotium-shaped structures (Armillaria mellea (Vahl) P. Kumm.,

Chondrostereum purpureum (Pers.) Pouzar, Lentinus cyathiformis (Schaeff.) Bres., Morchella crassipes (Vent.) Pers., Morchella elata Fr., Morchella esculenta Fr., Morchella steppicola Zerova, Mutinus caninus, Pleurotus calyptratus (Lindblad ex Fr.) Sacc., Polyporus squamosus (Huds.) Fr. and Oudemansiella radicata (Relhan) Singer) are promising for further research the initiation basidiomes formation in a pure culture.

Reference

1.Akata, I.; Kalyoncu, F.; Solak, M. H.; Kalmis, E.Growth of mycelium of three ectomycorrhizal macrofungi, Infundibulicybe geotropa, Tricholoma anatolicum and Lactarius deliciosus in culture media containing various carbon sources. African Journal of Microbiology Research; 2012, 6(12), 3042-3046.

2.Buchalo, A. S. Higher Edible Basidiomycetes in Pure Culture; Naukova Dumka: Kiev; 1988.

3.Carvajal, A. E. S. S.; Koehnlein, E. A.; Soares, A.A.; Eler, G. J.; Nakashima, A. T. A.; Bracht, A.; Peralta, R. M. Bioactives of fruiting bodies and submerged culture mycelia of Agaricus brasiliensis (A. blazei) and their antioxidant properties. LWT - Food Science and Technology; 2012, 46, 493 -499.

4.Diduh, Ya. P. Red Book of Ukraine. Flora; Hlobalkonsaltynh: Kyiv, 2009.

5.Dovgiy, R. S.; Pozur, V. V.; Svyatetska, V. N.; Suhomlyn, M. N.; Livinska, O. P.; Makarenko, A. N. Immunobiological action of extracts and medicines, obtained from mushrooms Ganoderma lucidum, Cordyceps sinensis and Leucoagaricus macrorhizus. Bulletin of the problems of biology and medicine (In Ukraine); 2013, 2(2), 44-49.

6.Endo, N.; Kawamura, F.; Kitahara, R.; Sakuma, D.; Fukuda, M.; Yamada, A. Synthesis of Japanese Boletus edulis ectomycorrhizae with Japanese red pine. Mycoscience; 2014, 55(5), 405-416.

7.Engler, M.; Anke, T; Sterner, O. Production of antibiotics by Collybia nivalis, Omphalotus olearis, a Favolaschia and a Pterula species on natural substrates. Z Naturforsch; 1988, 53(5-6), 318-24.

8.Gao, Y.; Chan, E.; Zhou, S. Immunomodulating activities of Ganoderma, a mushroom with medicinal properties. Food Rev. Int.; 2004, 2(20), 123-161.

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