Two novel species of Parastagonospora (Phaeosphaeriaceae, Pleosporales) on grasses from Italy and Russia

Name: Goonasekara ID

Address: 333 Moo1, Thasud, Muang, Chiang Rai 57100

Organization : Center of Excellence in Fungal Research, Mae Fah Luang University

Email : ask.library@mfu.ac.th

Name: Camporesi E

Name: Bulgakov TS

Name: Phookamsak R

Name: Jayawardena RS

Name: Saichana N

Name: McKenzie EHC

keyword: 2 new species – Dothideomycetes – multi-gene analysis – Poaceae – saprobes – taxonomy

ThaSH: Fungi

ThaSH: Fungi – Classification

ThaSH: Fungi – Spores

ThaSH: Fungi – Genetics

ThaSH: Fungi – Morphology

Abstract: Phaeosphaeriaceae comprises many fungal species occuring mainly on grasses and cereal crops as endophytes, saprobes and especially pathogens. Parastagonospora is an important genus in Phaeosphaeriaceae that includes pathogens causing leaf and glume blotch on cereal crops. In this study, a sexual morph species and an asexual morph species, occuring as saprobes on Poaceae are introduced based on morphology and a combined molecular analysis of the LSU, ITS and RPB2 gene sequence data. The sexual morph of a new Parastagonospora species, P. elymi was isolated from dead stems of Elymus repens in Russia. Parastagonospora elymi is similar to the sexual morph of P. avenae in having cylindrical asci, bearing eight, overlapping biseriate, fusiform ascospores but can be distinguished by its subglobose to conical-shaped, wider ascomata. In addition, no sheath was observed surrounding the ascospores. An asexual morph of Parastagonospora was isolated from dead stems of Dactylis glomerata in Italy and is introduced as P. macrouniseptata. Parastagonospora macrouniseptata is a coelomycete and bears a close resemblance to P. allouniseptata and P. uniseptata in having globose to subglobose, pycnidia and hyaline, cylindrical, 1-septate conidia. However, the new species is morphologically distinct in its conidiomata characteristics and phylogenetic affinity.

Mae Fah Luang University. Learning Resources and Educational Media Center

Address: CHIANG RAI

Email: library@mfu.ac.th

Modified: 2021-09-06

Issued: 2021-09-06

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BibliograpyCitation : Asian Journal of Mycology (AJOM). Vol.2, No.1 (January - June 2019): p.170-182

Asian Journal of Mycology 2(1): 170–182 (2019)

eng

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