Mustafa Nadhim Owaid – författare

Academic Paper from the year 2017 in the subject Biology - Miscellaneous, , language: English, abstract: The aim of this study is to investigate the antifungal activity of mycelia of Pleurotus ostreatus (white oyster mushroom) and licorice (Glycyrrhiza glabra) root extract against three undesirable fungi. They are Trichoderma spp., Trichoderma harzianum I and Trichoderma harzianum II which was tested on PSA (potato sucrose agar) medium enriched with licorice (Glycyrrhiza glabra) root extract (PSA-G media) using three concentrations (0.05, 0.10 and 0.20 g/L) in alone and dual cultures. Trichoderma spp. showed less mycelial growth of 8.75, 9.17 and 9.50 mm/day on PSA-G0.05, PSA-G0.1 and PSA-G0.2 respectively compared with 10.25 mm/day on fresh PSA (control) in dual culture. The best mycelial growth inhibition was recorded on PSA-G0.2 (14.97%) by T. harzianum II in alone culture opposite 63.72% in dual ones. The lower mycelial growth rate of T. harzianum I was 17.75 mm/day on PSA-G0.1 (0.10 g/L). In dual culture, overgrowth time of T. harzianum I had 5 days compared as approx. 6 days in alone culture. Generally, when the concentration of licorice extract increased, the mycelial growth rate of the undesirable fungi decreased. Also, all PSA-G media, especially PSA-G0.2, indicated low growth averages compared with the control (fresh PSA) against the pathogen while this concentration encourages growth of oyster mushroom. Also, this concentration reduced the density of sporulation of green molds; therefore, this concentration can be applied to reduce influence this pathogen in cultivation farm [...]

Academic Paper from the year 2017 in the subject Biology - Miscellaneous, , language: English, abstract: This work was achieved to determine the nutritional value (total protein, crude fiber, phenolic compounds, total carbohydrate, ash, dry matter, moisture content and pH) of four oyster mushrooms species namely; P. ostreatus (grey), P. ostreatus (white), P. cornucopiae var. citrinopileatus (yellow) and P. salmoneostramineus (pink), were investigated on three agro-substrates mixtures; S1 (wheat straw), S2 (70% wheat straw, 20% sawdust and 10% date palm fiber) and S3 (50% wheat straw, 30% sawdust and 20% date palm fiber) media. The variety of oyster mushroom showed significant (P<0.05) differences of nutritional value of oyster mushroom on various substrates. The mixture which composed from one substrate was poorer in mineral value than others which composed from more one. Generally, the higher protein content showed in P. cornucopiae (32.21%) compared with P. ostreatus (grey) (23.83%) as a lower value. P. ostreatus (grey) recorded total phenol, total carbohydrates and crude fibers 2.82 g/kg, 40.72% and 9.97%, while P. salmoneostramineus recorded 1.35 g/kg, 48.02% and 23.75% respectively. P. ostreatus (white) showed higher value of ash and dry matter (11.3% and 12.81%) than P. ostreatus (grey) and P. salmoneostramineus in values 7.0% and 9.93%, respectively.

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