Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 19, Issue 3, 2017; Page No.(540-544)

STUDY OF THE EFFECT OF DIFFERENT FACTORS ON GROWTH OF ASPERGILLUS TERREUS AND PENICILLIUM FUNGI THAT ISOLATED FROM APPLE FRUITS

HASSAN A. BAYDAA

Abstract

The work was conducted in the laboratories of Biology Department, Faculty of Science, University of Kufa, it dealt with the study of the effect of different factors on growth of Aspergillus terreus and Penicillium fungi isolated from apple fruits. The laboratory experiments demonstrated the optimal pH for Aspergillus terreus and Penicillium were pH=3 with 0.57 g and pH=9 with 0.46 g respectively, but no growth about two fungi in pH=7. This study showed that ability of the two fungi to grow in different temperature ranges, the optimal temperature for Aspergillus terreus and Penicillium were 30°C with 1.76 g and 40 °C with 1.57 g respectively, but the growth of Aspergillus terreus in (20 and 40) °C with (0.26 and 0.64) g respectively, the growth of Penicillium in (20 and 30) °C with (0.21 and 0.83) g respectively. Also the laboratory experiments proved that efficiency of A. terreus and Penicillium in growth in different NaCl concentrations, the highest growth for Aspergillus terreus and Penicillium when the concentration of 15 g/ L with (0.82 and 0.74 ) g respectively while the amount of growth of two fungi in 5 and 10 g/L with ( 0.27, 0.54) g , (0.22 , 0.41 ) g respectively. This study showed that efficiency from the two fungi growth in different of culture media but the best media for Aspergillus terreus and Penicillium was the potota dextrose broth with (1.46, 1.41) g respectively but the growth about two fungi in soybean dextrose broth and yeast extract broth with (0.52, 0.24)g respectively for Aspergillus terreus and (0.36 ,0.18) g respectively for Penicillium.

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