Puccinia hemerocallidis, Cause of Daylily Rust, a Newly Introduced Disease in the Americas

Abstract

A rust of daylilies was introduced recently into North and Central America. In order to confirm the identity of this rust as Puccinia hemerocallidis, numerous specimens from Costa Rica and the United States were examined morphologically and compared with specimens from China, Japan, Russia, and Taiwan. In addition, the internal transcribed spacer (ITS) region of the ribosomal DNA was sequenced from six representative fresh specimens from the Americas and Asia. We conclude that the rust introduced into the Americas is P. hemerocallidis, for which a modern description is provided with illustrations of the uredinial and telial stages.

Phylogeny and taxonomy of the Asian grapevine leaf rust fungus, Phakopsora euvitis, and its allies (Uredinales)

“…hemerocallidis Thümen, into North America (William-Woodward et al 2001). Peculiarly, ITS sequence differences at 13 base positions were detected between the Japanese and North American daylily rust collections (Hernándes et al 2002;Chatasiri et al 2006). No pertinent interpretation was possible for the genetic differences between them because neither spermogonialaecial nor uredinial-telial hosts of the fungus are indigenous in North America.…”

Phylogenetic relationships among Puccinia hemerocallidis, P. funkiae, and P. patriniae (Uredinales) inferred from ITS sequence data

“…All other positions are identical. Dashes represent alignment gaps a As shown in Hernández et al (2002;Fig. 3) of 0.625.…”

“…1,2). Puccinia hemerocallidis was first detected in Georgia (USA) in and in Costa Rica in 2001(Williams-Woodward et al 2001Hernández et al 2002), and the fungus has since become widespread in North America. Costa Rica is one of the Central American countries from which daylily nursery stocks are shipped.…”

“…: Liliaceae) are native to eastern Asia but are globally distributed as wild and horticulturally modified plants in botanical, horticultural, and residential gardens. Leaf rust is one of the few fungal diseases of daylilies (Hiratsuka et al 1992;Kishi 1998; The Phytopathological Society of Japan 2000), and can be serious under certain circumstances, as recently experienced in North America (Williams-Woodward et al 2001;Hernández et al 2002). Puccinia hemerocallidis Thümen is the causal fungus of the daylily leaf rust and was once believed to be the same species as the plantainlily leaf rust fungus because of similarities in their telial structure and teliospore morphology (Hiratsuka et al 1992;Kishi 1998; The Phytopathological Society of Japan 2000).…”

Morphological and molecular characterization of Endophyllum species on perennial asteraceous plants in South Africa

“…Sequences were assembled and added to sequences obtained from GenBank (http://www.ncbi.nlm.nih.gov; Berthier et al 1996, Roy et al 1998, Pfunder, Schu¨rch & Roy 2001, Herna´ndez, Palm & Castlebury 2002, Weber, Webster & Engel 2003 using Sequence Alignment Editor v2.0a11 (Rambaut 2002), and manual adjustments for improvement were made where necessary. Pucciniastrum goeppeltianum (L76509) was included as the outgroup.…”