مطالعه ( Podosphaera section Sphaerotheca (Erysiphaceae در ايران

STUDY ON THE PODOSPHAERA SECTION SPHAEROTHECA (ERYSIPHACEAEI IN IRAN

In a taxonomic study on the genus Podospboera sect. Sphaerotheca. several newly collected specimens and all speeimens from fungus collection of the Ministry of Jihad-eAgriculture, were examined. A total of 13 taxa including Podosphaera aphanis var. aphonis, P. ophanis var. hyalina. P. balsanunae, P. diosacacearum. P. erodii, P. euphorbiae, P. [errugineu, P.fugax. P. [usca, P. mocutaris, P. plaruoginis. P. parmosa and P. xanmii were identified. Morphology of the thin-walled apieal portion of the asci (oculus) was examined among taxa. The results revealed the usefulness of this feature for identification of some taxa as shown by other researchers. On the basis of morphological charaeterisncs of P. aphanis var. hyalina, it was shown that taxon differrs from type variety in having short appendages, ascus size as well as wider oeuli. It seems there is enough evidenee to raise this variety as a separate species. Hence, it is necessary to investigate more characteristics especially ribosomal DNA or other genes sequencing to make an indisputable decision. Plant species viz. Hieracuon sp.. Potenntla hirt a and Scabiosa persica are recorded as new hosts for Erysiphaceae of Iran. A key for the Iranian taxa of this section is provided