title: Species of colletotrichum on agavaceae.
abstract: Species of Colletotrichum cause diseases on a wide range of hosts, frequently infecting plants in the Agavaceae (monocotyledons: Liliales). Three species of Colletotrichum restricted to the Agavaceae were detected through morphological studies of specimens and molecular sequence analyses of the LSU of the nu-rDNA and the ITS region of the nu-rDNA from cultures. Colletotrichum agaves on Agave is fully described and illustrated. Colletotrichum dracaenophilum is described as a new species for isolates having long conidia and occurring on Dracaena sanderiana from China. Colletotrichum phormii and Glomerella phormii are determined to be the correct scientific names for the asexual and sexual states, respectively, of a species commonly referred to as C. rhodocyclum and G. phacidiomorpha occurring mainly on Phormium. In addition, C. gloeosporioides and C. boninense were isolated from plants in the Agavaceae. All species of Colletotrichum described on Agavaceae were evaluated based on type specimens. A key to the five species of Colletotrichum on Agavaceae is included. This paper includes one new species, Colletotrichum dracaenophilum, and three new combinations, Colletotrichum phormii, Glomerella phormii, and Phaeosphaeriopsis phacidiomorpha.
authors.affiliation: Systematic Botany & Mycology Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, USA.
authors.forename: David F
authors.initials: DF
authors.lastname: Farr
authors.forename: M Catherine
authors.initials: MC
authors.lastname: Aime
authors.forename: Amy Y
authors.initials: AY
authors.lastname: Rossman
authors.forename: Mary E
authors.initials: ME
authors.lastname: Palm
mesh_terms: D000070357:Asparagaceae; D001483:Base Sequence; D020231:Colletotrichum / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000648:ultrastructure; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D014644:Genetic Variation; D008856:Microscopy, Fluorescence; D008969:Molecular Sequence Data; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D016133:Polymerase Chain Reaction; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal