دراسة انتشار انواع الفطر Saprolegnia spp. في مياه مدينة الديوانية وتوصيفها جزيئيا == Studying The Spreading of Fungus Saprolegnia SPP. In Waters of Diwaniyah City And Characterization The Molecularly
Author name:
معتز محمد عزوز الزاملي
Supervisor name:
ماجد كاظم عبود الشبلي
General topic:
Biology
Specific topic:
Microbiology
Degree:
Master
University:
University of Al-Qadisiyah - Faculty Of Education - Department Of Biology
Language:
Arabic
University location:
Qadisiyah
First pages:
24T2687 - p.pdf
Abstract:
شملت الدراسة الحالية عزل وتشخيص بعض الفطريات المائية ومنها انواع الفطر Saprolegnia spp. في مياه مدينة الديوانية وتوصيفها جزيئيا. عزلت الانواع التابعة لهذا الفطر وهما Saprolegnia parasitica وSaprolegnia ferax من الانهار والبحيرات والاسماك, وتم قياس الخصائ | The present study is concerned with isolation and identification of some aquatic fungi, including species of Saprolegnia spp. in waters of Al - Diwaniyah city and molecular characterization. Two species, Saprolegnia parasitica and Saprolegnia ferax, have been isolated from rivers, lakes and fishes. The physical and chemical environmental characteristics have been measured. The types above have been examined to extract the DNA. The (PCR) technique has been used to examine the presence of protease enzyme. The results of isolation and identification showed that the percentage of the two species were 64% in rivers areas 40% in the lakes areas and 50% in fishes. The rates represented the examined samples which were 60 samples. AS well as isolates was in rivers 16 isolation and in Lakes 10 isolates either in fish was 5 isolation and thus the total isolates 31 isolation, The S. parasitica species is more apparently found during (February, 2014), the number of samples was 12, the less presence of this species in (April, 2014), where the number of sample, was 3. The S. ferax species is more apparently presented in (February, 2014), the number of samples was 10. The less presence was in (April, 2014), the number of samples was 2. The results showed that the number of isolation of Saprolegnia spp. study area as it was S.parasitica species in were 6 in rivers, 2 in lakes, and 3 in fishes. The second species, S. ferax showed number of isolations which were 10 in rivers, 8 in lakes, and 2 in fishes. The PCR examination has used to detect the rDNA gene which responsible for proteases gene and whether it is found in the two species of fungi. The express way has been used to extract DNA and according to the instructions of manufacturer company. The concentrations of DNA in first species were 121.8 - 73.0 mcg/microliter and purity 1.87 - 1.80.In the second species the concentrations of DNA were 2360.4 - 166.9 mcg/microliter and purity 2 - 1.75. The results, by using PCR technique, showed that the percentage of protease in first species was 25% in rivers. In lakes and fish was 100%.Concerning the second species, the percentage of enzyme was 42% in rivers, 40%in lakes, and 50% in fishes. It can be concluded that there is a diversity in fungi species with respect to study areas and enzyme secretion in the stages of fungi infection. The enzyme is more apparently found in S.parasitica species compared with S.ferax species.
