Study on action and potential of biological accumulation of chromium on the enzymatic phase of Tremella spp. by nuclear technique

The fermentation of 8 species Jelly fungi Tremella spp., traditionally utilized in folk medicine as precious material supplemented with chromium in cation form (Cr2(SO4)3) over a wide range of 50 -1000 ppm to show very low toxicity of Cr. The LG 50 value (limit of growth by 50%) was determined to be ca. 1000 ppm Cr. Under 100 ppm, Cr was not toxic for the yeast to grow. In the liquid medium with 50 ppm Cr added, yeasts of T. encephala grow well and accumulated Cr at considerably high levels (808, 520 and 480 ppm in dry biomass harvested after 5, 10, 15 days of stationary fermentation, respectively), as determined by Instrumental Neutron Activation Analysis in the Nuclear Reactor of Dalat, Vietnam. The fermented biomass of Tremella fungi, enriched with Cr would be promising new preparations for treatments of diabetes

Fill up to the antineoplastic fungi group in Vietnam: Schizophyllum commune

Schizophyllum commune (Fr:Fr.) rick were collected from various regions in Vietnam, thoroughly described and isolated for fruitful cultivations and mycelial fermentations to supply precious material for antitumor preparations

Field mushroom of Cao Bang province - A special taxon of the branch Lentinula Pegler

A minireview on current status in systematics of the genus Lentinula Pegler was presented addition of distinct collection of Cao Bang stain of shiitake from Vietnam, that were described as a new geographical race with morphologically specific characters intermediating between L. edodes and L. lateritia. Furthermore, non fertile hybrids (basidiosporeless lines) obtained by nonospore-crossing between Cao Bang strain and strains of l. edodes from Japan support so distinct differentiations, that Cao Bang shiitake would be suggested even at the rank of biologically distinct species

Fill up to the group of antineoplastic fungi in Viet Nam: Fungus donko (fungus shiitake) (Lentinula edodes (Berk.) Pegler = Lentinus edodes (Berk.) Sing

A minireview on pharmacology of Shiitake lentinula edodes (Berk.) Pegler = Lentinus edodes (Berk.) Sing. and a revision on its nomenclature for taxonomy were given to reveal the importance of biotechnology of Shiitake cultivations at large scales in VietNam to supply the precious material and foods.

Discovery of old colossal Linh Chi mushroom at Da Lat (Ganoderma dalatense Tham sp. nov.)

A giant Lingzhi mushroom newly found in DaLat, Central Highland of South of Vietnam (alt. 1330m) was determined as a new species: Ganoderma dalatense Th¸m sp. nov., with laccate crust developed irregularly on the lower surface of the pilei (as chimeras on the hymenium surfaces) as a distinguished macrocharacter from other know Ganoderma species, with extraordinary sizes: 106 cm in length, up to 31 cm in thickness, 31kg in weight. This holotype specimen would be largest in Ganoderma in the world, recorded up to date. Detailed diagnosis was given and thoroughly discussed with related other taxa.

Study on possibility of inorganic nitrogen utilization in Amauroderma elmerianum by labeling method with stable isotope 15N

The Black mannentake Amauroderma elmerianum Murr. has been newly found and cultivated in §µ L¹t, ViÖt Nam on mixed substrates, supplemented with inorganic nitrogen (ammonium sulfate), traced with 15N (4% excess). The efficiency of utilization of inorganic N fertilizer is determined about 70%, while organic N derived form various components in substrates (branch and bean powder) is only 7%. The amount of N in inorganic fertilizer added is less than 15% of total N amount in the substrates. The application of N fertilizer in combination with organic components, rich in N in substrates for cultivation of Lingzhi fungi as a material medica with improved quality has been discussed, based on using newly suggested 15N tracer techniques

Study on the species of mushroom Auricularia delicata f. purpurea and f. alba recently discovered at Da Lat

The mushroom “wood ear” Auricularia delicata (Fr) Henn.f. purpurea Y. Kobayyasi and f.alba Y. Kobayaasi have been found for the first time in §µ L¹t, Central Highland of ViÖt Nam and cultivated fruitfully as delicious foods and pharmaceutical material.

Addition to the group of antineoplastic fungi in Vietnam: The fungus Van Chi: Trametes versicolor(L.:Fr) Pilat

The Kawaratake (Van Chi) Trametes versicolor (L.:Fr) Pilat was for the first time isolated and fruitfully cultivated on mixed substrates in §a Lat, Vietnam for preservation of fungal gene resources and for supply of antitumor materia medica in comparing with the type strain from Takaski, Japan

In addition to the group of antineoplastic fungi in Vietnam, a rare species of mushroom Maitake Grifola frondosa (Dicks. Fr.) S.F.Gray

Grifola frondosa (Dicks. Fr.) S.F.Gray. was for the first time isolated and fruifully cultivated on mixed substrate in §µ L¹t, Vietnam for preservation of fungal gene resources and for suppling of nutritional foods and pharmaceutical material

Study on cultivation of the mushroom (yamabushitake) Hericium Erinaceum (Bull. Fr) pers

Houtou fungus Hericium Erinaceum (Bull. Fr) pers. is cultivated fruitly in §µ l¹t, ViÖt Nam on mixed substrates of lignocellulosic wastes, with high biological efficiency(35- 50%), during 33-39 days after inoculation

The mushroom Pleurotus pulmonarius in Vietnam

For the first time, the natural specimens of Abalone Oyster mushroom Pleurotus pulmonarius (Fr.) Quel. were collected and comparatively identified in Central Highland, South Vietnam. Pure isolation and fruitful cultivation of this mushroom were conducted for preservation of fungal gene resources and supply of precious foods and pharmaceutical material

Fill up to the group of antineoplastic mushrooms in Vietnam a very rare species: Agaricus blazei Murrill

The squamule button mushroom Agaricus blazei Murrill was fruifully cultivated in Da Lat, VietNam, under similar procedure at large scales with white button mushroom A. bisporus, giving lower biological efficiency (biomass of fresh fruibodies harvested per unit of dry composts used). The prefectful development of fruibodies was described and a minireview on their medicine - food value was discussed