Reference Report for rust_ref7
| Title: | Delimitation of Phakopsora, Physopella and Cerotelium and their species on Leguminosae |
| Authors: | Ono, Y., Buritica, P., Hennen, J.F. |
| Source: | Mycol. Res. 1992, 96(10):825-850 |
| Abstract: | Two species are established for the soybean rust fungi based on morphological differences between their anamorphs and teleomorphs: Phakopsora pachyrhizi includes the Austro-Asian populations whose telia are irregularly 2- to 7-spore layered, and whose teliopsores have walls that are pale yellowish brown to colourless, and equally ca 1 mu-m thick or slightly thickened apically to 3 mu-m in the outermost spores. Malupa sojae (syn.: Uredo sojae) is its uredinal anamorph. Phakopsora meibomiae includes the New World populaitons whose telia are irregularly 1- to 4(-5)-spore layered, and whose teliospores have walls that are cinnamon- to light chestnut-brown, and 1.5-2 mu-m thick but thickened apically to 6 mu-m in the outermost spores. Malupa vignae (syn: Uredo vignae) is its uredinital anamorph. Physopella is treated not as a teleomorph but as a anamorphic genus with connexions to Phakopora and Cerotelium. Angiopsora is a telemorphic genus for which Physopella was erroneously subsituted. But Angiopsora is placed in synonymy under Phakopsora because its supposed defining characteristics of teliospores in vertical rows is not consistent. Malupa is named as a new anamorphic genus with sori that are surrounded by a peridium composed of of one or more irregular layers of compressed and distorted hyphae ending in paraphyses. The spores are one-celled, usually echinulate, and usually sessile or almost so. The sort of Physopella are surrounded by numerous, well-defined paraphyses arising from the hymenial level, which are usually incurred over the sori. Cerotelium is separate from Phakopsora because its telial sori have a well-defined hymenium of teliosporogenous cells and hyaline, thin-walled teliospores, traits lacking in Phakopsora. In addition to two species on soybeans, four other species of Phalopsora and five species of Cerotelium parasitize legumes, each of which has eiterh a Malupa, Milesia or Physopella anamorph. Three new unconnected Milesia species are included. All of these taxa occur on the subfamily Faboideae except two which are on Bauhinia in the Caesalpinioideae |
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