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ABSTRACT
Volvariella volvacea (Bull Ex. Fr) Singer, is an edible fungus, in the Basidiomycota division they are characterized with ability to tolerate high-temperature and few adverse conditions such as concentration of salts on the growth medium. Salt, also commonly named table salt, is an ionic compound made of chloride ions, Salt comes from two main sources: sea water and mines in land (also known as rock salt). From its underground beds salt may be extracted by mining. In this study the effect of salts (Nacl and CaCl) on the vegetative growth of V. volvaceae was studied and it was observed that salts concentration influences the vegetative growth of the fungus, high concentration of salts usually inhibit the vegetative growth and reduces other physico characteristics of the fungus. The mycelial growth rate and biomass initially increased and then decreased as the salt (NaCl) concentration increases on the tenth day the highest mycelial length measurements was (8.50 ±0.00)cm while treatment with high salt concentration (0.8-2.5g/ml) showed a lesser mycelial length elongation (7.10 ± 0.00)cm. These results signified that concentration of salts on the growth medium of V. volvacea influences the mycelial, biomass characteristics, optimal concentration of salts influenced the mycelial growth and biomass positively.
