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Issue: Vol. 423 No. 3: 6 November 2019
Type: Article
Published: 2019-11-06
DOI: 10.11646/phytotaxa.423.3.7
Page range: 187–194
Abstract views: 32
PDF downloaded: 1

Taxonomy and phylogenetic position of Phragmidium altaicum, a newly described rust fungus on Rosa, based on molecular and morphological data

The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China
Faculty of Education, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512 Japan
The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan
Laboratory of Mycology, Institute of Botany, Academy of Sciences of the Republic of Uzbekistan, 232 Durmon Yuli Street, Tashkent 100125, Uzbekistan
Museum of Beijing Forestry University, Beijing Forestry University, Beijing 100083, China
China geographic distribution Phragmidiaceae rose rusts rDNA Fungi

Abstract

Phragmidium altaicum, a new causal fungus of a rose rust disease, is described and illustrated. The species, collected in Xinjiang Province, northwestern China, is well distinguished by its morphology and rDNA LSU and ITS sequences from the other Phragmidium species on Rosa. The new rust species is characterized primarily by 4–7-celled teliospores, bearing robust verrucae on the surface, aeciospore-surface structure of ‘Echinulate type 4,’ and urediniospore surface completely covered with echinulae with inapparent mushroom-shaped base. The sequence analysis showed that this species is closely allied to P. tuberculatum, but they differ in their morphological characteristics.