Influence of cadmium on certain biological activities in a cadmium-tolerant fungi |
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| Authors: | Shadia E Ramadan A A Razak H G Soliman |
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| Institution: | 1. Department of Botany, Faculty of Science, Al-Azhar University, Medinet Nasr, Cairo, Egypt
2. Department of Faculty of Science for Girls, Al-Azhar University, Medinet Nasr, Cairo, Egypt
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| Abstract: | Aspergillus carbonarius and a strain ofPenicillium are able to grow on Harrold's agar media amended with different concentrations of cadmium chloride up to 2.5% (w/v). Considerable
quantities of cadmium were absorbed by both fungi.A. carbonarius absorbed more cadmium than thePenicillium sp. did, under the same culturing conditions. In the presence of cadmium, the determined cellular contents of proteins, lipids,
and carbohydrates were extraordinary high, whereas the activities of certain enzymes, lipases, amylases, and proteases were
inhibited. The fungal rate of growth and sporulations were mostly suppressed. Conidiations were inhibited at lowest concentrations.
At 1% Cd Cl2,A. carbonarius produced malformed conidiophores, whereas thePenicillium sp. was less affected. At higher concentrations conidiophores production were entirely suppressed and several hyphal swellings
were produced. |
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| Keywords: | Index Entries" target="_blank">Index Entries Cadmium toxicity morphological distoritions cadmium-tolerant fungi amylases lipases proteases conidiogenesis Aspergillus carbonarius strain ofPenicillium |
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