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Yield potential and antioxidant activity of Indian Ganoderma strains

Vedukola PullaReddy, Dharmesh Gupta, Sudheer Kumar Annepu, Anupam Barh, Satish Kumar, Manisha Thakur & Joginder Pal

Sydowia 73: 209-215

Published online on February 26th, 2021

The cultivation of Reishi or Lingzhi mushroom using artificial bag log method has been optimized for four different strains viz., DMRO-44, DMRO-45, DMRO-90 and DMRO-207. Various lignocellulosic materials were tested as growing substrate, and the sawdust of Toona celiata supplemented with wheat bran resulted in maximum Biological Efficiency (BE) of 22.10±1.01 % for the strain DMRO-90. The free radical scavenging activity of the fruiting bodies were investigated by DPPH (1,1-diphenyl- 2-picrylhydrazyl), ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)] and reducing power assay. Acetonic extracts at a concentration of 1000 µg/ml showed significantly maximum radical scavenging activity for all the four strains. At the concentration of 1000 µg/ml, the strain DMRO-90 exhibited the highest DPPH scavenging activity of 67.05 % and ABTS scavenging activity was recorded as 66.05 %. Preliminary biochemical analysis identified the presence of alkaloids, carbohydrates, flavonoids, phenolic compounds, terpenoids and tannins in all the four strains. The quantitative estimation revealed that, strain DMRO-90 significantly contains higher total phenolics (50.02 mg GAE/g), ß-carotene (0.89 µg/g) and lycopene (0.36 µg/g). This study indicated the scope for mass production of Ganoderma mushroom on sawdust substrate and the fruiting bodies can act as a potential source for preparation of dietary supplements and mushroom fortified functional foods.

Keywords: Reishi, medicinal mushrooms, growing substrate, DPPH, ABTS, reducing power assay.

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