تأثير الملوحة على تواجد الفطريات في تربة ساحل البحر الأحمر لمدينة القنفذه بالمملكة العربية السعودية

الملخص EN

Halophilic and halotolerant fungi were isolated from soil samples planted by (Zygophyllum simplex) and non planted soil samples.

Sodium chlorid cocentrations were added in 10, 20, 30 and 40 % to the soil samples at 28 ± 2 C.

The results showed that there was fungal population after one month of study and completely disappeared in the next months.

It was observed that decreased of total fungal population in the two soil samples with increased of sodium chloride concentrations.

Ten fungal species belonging to three genera Aspergillus, Nectria and Verticillium were isolated from planted soil.

The only genus of fungi that enabled to grow, when added several cocentrations of sodium chloride to the soil samples was Aspergillus .

Five genera were isolated from the none planted soil samples were Aspergillus, Fusarium, Nectria, Chrysosporium and Curvularia, the genus Aspergillus and Fusarium were enable to grow when added the several concentrations of NaCl.

Some fungi were recovered on control and not isolated when added Sodium Chloride concetrations such as: Chrysosporium and Nectria.

In contrast the frequency of occurrence of some species increased when added 20% Sodium Chloride concentrations to the planted soil samples such as: A.

candidus, A.

niger, A.

parasiticus, A.

ustus and A.

versicolor, whereas A.

flavus have been presented only in 30% NaCl.

In non planted soil A.

flavus and F.

chlamydosporum were presented in 20 , 10% of NaCl respectively.

There was no fungal population appeared in 40% NaCl in all soil samples.