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A Biosystematics Study of Microcystis (Cyanobacteria), A Bloom-Forming Cyanobacterium from Aras Reservoir (North-West Iran)

محل انتشار: مجله تحقیقات زیست شناسی، دوره: 1، شماره: 1
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 170

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https://civilica.com/doc/1267970

شناسه ملی سند علمی:

JR_PHYCLG-1-1_003

تاریخ نمایه سازی: 23 شهریور 1400

چکیده مقاله:

Today, harmful cyanobacerial bloom is consideredas a main problem in freshwater ecosystemsall over the world. The Microcystis is an importantgenus in cyanobacteria composed of about ۲۳species. This genusforms various shaped coloniesincluding spherical or oblong cells which wholecolony is surrounded by a mucilage sheath. Manypopulations and species of the genus produce severblooms and often toxins in eutrophic freshwaters.The genus Microcystis has been defined based onmorphological, morphometrical and genetical criteria,however, its classification under the genuslevel is still indistinct and presence of traditionalmorphological species within the genus is doubtful.Therefore, determining of the natural diversityunder the genus level in Microcystis has a crucialimportance. The purpose of this study was to determinethe species of Microcystis in Aras reservoir.The samples were collected from ۶ sampling siteson ۱۸ August ۲۰۱۳. Morphological and morphometricalstudies of Microcystis was carried out byNikon ۵۰i microscope equipped with Nikon DSFicamera and Nikon monitor with length measurmentsoftware. Principal Component Analysis(PCA) and two-way Unweighted Pair GroupMethod with Arithmetic Mean (UPGMA) byPAleontological STatistics (PAST) version ۳.۰۴were performed to determine biosystematics variationsbetween Microcystis populations. The resultsindicated that Microcystis from Aras reservoirwas composed of two distinct groups based on theshape and size of cells, colony form, presence andabsence of gelatinous sheath around the colonies,etc).These two groups may be considered as twomorphospecies of M. botrys which are separateddue to different ecological factors.

کلیدواژه ها:

Microcystis ، Morphology ، Morphometry ، Aras reservoir

نویسندگان

Fereydon Mohebbi

Assistant Prof., National Artemia research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Uramia, Iran

Ahmad Ghoroghi

Assistant Prof., National Artemia research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Uramia, Iran

sohrab RezvaniGilkolaei

Associate Prof., National Artemia research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Uramia, Iran

Hossein Riahi

Faculty of Biological Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran

Ali Nekoeifard

Associate Prof., National Artemia research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Uramia, Iran

Masoud Seidgar

Assistant Prof., National Artemia research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Uramia, Iran

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