Abstract
The aim of this study was to evaluate the biological efficiency and main bioactive components of three G. lucidum strains, viz. GA1, GA2, and GA3, cultivated in Tam Dao town. The results demonstrated that all strains were capable of growing well on PDA medium supplemented with rice bran. The time required for complete colonization was 9 days. All tested strains of G. lucidum were able to adapt to climate conditions and produce fruiting bodies with satisfactory yield (13-17%), and therefore, they could be considered suitable candidates for commercial cultivation of G. lucidum in Tam Dao. No significant differences in polysaccharide content were observed among all strains. High concentrations of lucidenic N acid (0.33 mg g-1) and ganoderic acid (2.38 mg g-1) were determined in strain GA3. However, the highest ganodermanontriol content was detected in the strain GA1 with 0.3 mg g-1.
Highlights
Ganoderma lucidum (Fr.) Karst (Polyporaceae) has long been regarded as one of the most famous traditional medicinal herbs in the orient for more than 2000 years, and belongs to the family Polyporaceae of order Aphyllophorales (Gurung et al, 2012)
Strains GA1 and GA2 were white whereas strain GA3 exhibited white at the initial stage of growth, and changed to offwhite on the 7th day
All the strains cultivated in Tam Dao were found to grow, adapt, and produce the fruiting bodies with satisfactory yield (13-17%)
Summary
Ganoderma lucidum (Fr.) Karst (Polyporaceae) has long been regarded as one of the most famous traditional medicinal herbs in the orient for more than 2000 years, and belongs to the family Polyporaceae (or Ganodermaceae) of order Aphyllophorales (Gurung et al, 2012). G. lucidum, known as Lingzhi in China or Reishi in Japan (Wagner et al, 2003), has been reported as a source of medicinal compounds (Boh et al, 2007). Morphological characteristics, yield performance, and medicinal value of Lingzhi mushroom strains to treat and prevent more than 20 different illnesses such as hepatopathy, chronic hepatitis, nephritis, hypertension, hyperlipemia, arthritis, neurasthenia, insomnia, bronchitis, asthma, gastric ulcer, arteriosclerosis, leukopenia, diabetes, anorexia, and cancer (Stamets, 1993; Mizuno et al, 1995; Wagner et al, 2003). The two main groups of bioactive compounds isolated from G. lucidum are triterpenoids and polysaccharides (Chen et al, 2012). More than 150 triterpenoids as main bioactive components have been identified in Ganoderma spp. Fruiting bodies before maturity exhibit the highest amounts of total triterpenoids and total polysaccharides
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