IMA Fungus 6(2): 477-482, doi: 10.5598/imafungus.2015.06.02.11
Microcyclic rusts of hollyhock (Alcea rosea)
Jill E. Demers‡, Megan K. Romberg§, Lisa A. Castlebury|‡ USDA-ARS, Systematic Mycology and Microbiology Laboratory, Beltsville§ USDA-APHIS-PPQ-National Identification Services, Beltsville| USDA-ARS, Mycology & Nematology Genetic Diversity and Biology Laboratory, Beltsville
© Jill Demers, Megan Romberg, Lisa Castlebury. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY-NC 4.0), which permits to copy and distribute the article for non-commercial purposes, provided that the article is not altered or modified and the original author and source are credited. Citation:
Demers JE, Romberg MK, Castlebury LA (2015) Microcyclic rusts of hollyhock (Alcea rosea). IMA Fungus 6(2): 477-482. https://doi.org/10.5598/imafungus.2015.06.02.11 |  |
Abstract
Rust fungi infecting hollyhock and other plants in Malveae are frequently intercepted at ports of entry to the USA, particularly Puccinia malvacearum and P. heterogenea. These two species can be difficult to distinguish and can be further confused with other, less common species of microcyclic rust fungi infecting hollyhock: P. heterospora, P. lobata, P. platyspora, and P. sherardiana. Molecular phylogenetic analysis revealed that P. malvacearum and P heterogenea are closely related, along with P. sherardiana and P. platyspora. A key to the six microcyclic Puccinia species infecting hollyhock is presented.
Keywords
Pucciniales, Puccinia, pathogen interceptions, identification, taxonomy