Lentinus Subnudus Research Articles

Changes in enzyme activities of Termitomyces robustus (Beli) Heim and Lentinus subnudus Berk during sporophore development

The activities of amylases, proteinase, cellulase, lipase, peroxidase, catalase, polyphenol oxidase and glucose-6-phosphatase in mature, young and very young stages of Termitomyces robustus (Beeli) Heim and Lentinus subnudus Berk were determined. Apart from β-amylase and glucose-6-phosphatase, the activities of the assayed enzymes increased from very young to mature fruitbody stages. Moreover, while the young fruitbody showed the highest glucose-6-phosphatase activity out of the three mushroom stages, there was no distinct trend with respect to the β-amylase activities. For cellulase, the activity in the stipe was greater than that of the pileus, while for the other enzymes, the reverse was the case. The mature fruit-bodies show the greatest loss of flavour, whiteness and food nutrients during storage. The findings are discussed in relation to past work.

Changes in nutrient contents of two Nigerian mushrooms, Termitomyces robustus (Beeli) Heim and Lentinus subnudus Berk, during sporophore development

AbstractSamples of mature, young and very young sporophores of Termitomyces robustus (Beeli) Heim and Lentinus subnudus Berk were analyzed for their nutrient contents. The amino acid, protein, glycogen, lipid, sugar, ascorbic acid and ash contents were found to increase from very young to mature sporophores. These food nutrients except the crude fibre were more abundant in the pilei than the stipes. In contrast, the mineral elements did not show any definite trend in the sporophores investigated. However potassium was the most abundant followed by phosphorus and magnesium in that decreasing order. Manganese was the least abundant in the sporophores. It is clear from this study that T. robustus and L. subnudus would compared favourably with other well‐known nutritious mushrooms.

Physiological studies on Indian edible mushrooms

Growth requirements of Agaricus campestris L. ex Fr., Lentinus subnudus Berk., Calocybe indica P. & C., Volvariella volvacea (Bull. ex Fr.) Sing. and Termitomyces eurhizus (Berk.) Heim were studied in detail. The optimal temperature and pH for growth varied between 25° and 30° and 4.0–6.5, respectively. Of 19 carbon compounds, mannitol, dextrin, glucose, fructose and sorbitol were best utilized by A. campestris, L. subnudus, C. indica, V. volvacea and T. eurhizus respectively. Among 16 amino acids and amides tested, glutamic acid was preferred by A. campestris and V. volvacea while histidine was favoured by L. subnudus and C. indica. T. eurhizus showed best growth in a medium containing alanine. The ratio of carbon and nitrogen (C:N) and trace elements (Cu 2+ , Fe 2+ , Zn 2+ and Mn 2+ ) affected the growth of the test species significantly. Most of the test mushrooms utilized potassium and thiamine for their mycelial growth.