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.
Highlights
Plants and plant products imported into the USA are inspected at ports of entry for pests including insects, mollusks, nematodes, bacteria, and fungi (McCullough et al 2006)
Maximum likelihood trees were inferred using RAxML BlackBox (Stamatakis et al 2008). Both Puccinia malvacearum and P. heterogenea were commonly intercepted at ports of entry into the USA between 1950 and 2015
Other rust fungi intercepted on A. rosea were P. heterospora, P. lobata, and P. sherardiana
Summary
Plants and plant products imported into the USA are inspected at ports of entry for pests including insects, mollusks, nematodes, bacteria, and fungi (McCullough et al 2006). Six species of Puccinia have been reported to produce telia on A. rosea: P. heterogenea, P. heterospora, P. lobata, P. malvacearum, P. platyspora, and P. sherardiana (Arthur 1922, Lindquist 1982, Farr & Rossman 2015) All of these species are microcyclic and do not produce uredinia or aecia, have no known alternate hosts, and produce both one-celled and two-celled teliospores with different spore morphologies predominating in different species (Arthur 1922, Lindquist 1982). Another two species of Puccinia, P. interveniens and P. schedonnardi, are reported to produce aecia on A. rosea, and A. rosea is reported to be infected by two other rust fungi, Endophyllum tuberculatum and Kuehneola malvicola
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
