A TAXONOMIC STUDY ON SOIL TAXA OF APOHETEROCYTIC CYANOPROKARYOTA FROM NOSTOCACEAE FAMILY IN IRAN

جهت بررسي نمونه هاي خاكزي خانواده Nostocaceae Kützing، تاكسون هاي موجود در خاك 20 ايستگاه از 7 استان داراي كشت برنج كشور مورد مطالعه قرار گرفت. طي اين تحقيق در مجموع تاكسون‌هايي متعلق به 6 جنس از اين خانواده شناسايي شد كه از ميان تاكسون-هاي شناسايي شده، 18 گونه و 1 واريته از 4 جنس Nostoc Vaucher ex Bornet & Flahault ، Trichormus (Ralfs ex Bornet & Flahault) Kom?rek & Anagnostidis ، Nodularia Mertens ex Bornet & Flahault و Aulosira Kirchner ex Bornet & Flahault داراي ساختار ترايكمي آپوهتروسيتيك و 20 تاكسون از 2 جنس Anabaena Bory ex Bornet & Flahault و Cylindrospermum Kützing ex Bornet & Flahault داراي ساختار پاراهتروسيتيك مي باشند. از ميان گونه هاي شناسايي شده از اين خانواده، چهار گونه زير براي نخستين بار از ايران گزارش مي‌شوند و كليد شناسايي، محدوده پراكنش و تصاوير كامرا لوسيداي گونه هاي شناسايي شده، به همراه شرح گونه هاي جديد با تاكيد بر تاكسون هاي داراي ساختار آپوهتروسيتيك ارايه مي گردد.

In a revision of the family Nostocaceae Kützing in terrestrial habitats of Iran, several taxa belonging to six genera were identified. Isolates were collected from 20 paddy field soils located in seven provinces of Iran. Among the identified taxa, 18 species and one variety belong to four genera, Nostoc Vaucher ex Bornet & Flahault, Trichormus (Ralfs ex Bornet & Flahault) Kom?rek & Anagnostidis, Nodularia Mertens ex Bornet & Flahault and Aulosira Kirchner ex Bornet & Flahault, known as apoheterocytic cyanoprokaryota and 20 taxa from two genera, Anabaena Bory ex Bornet & Flahault and Cylindrospermum Kützing ex Bornet & Flahault, known as paraheterocytic cyanoprokaryota. Among these taxa, Nostoc linckia var. arvense C. B. Rao Rao, Nostoc alatosporum Sant Anna & al., Nostoc spongiaeforme Agardh ex Born. & Flah. and Nostoc verrucosum Vaucher ex Born. & Flah. are reported as four new records from this family in Iran. An identification key, distribution area and camera lucida pictures of apoheterocytic species as well as description of new taxa are presented in this study.