Isolate ID
PD_01603 (Phytophthora foliorum )
Source(s) and alternative IDs
Host of origin
N/A
Substrate
Geographic origin
United States ( TN )
Pathogenic Race
Date of Isolation
May. 2004
Mating Type
Homothallic
Characteristics
Reference
Remarks
Holotype. Received from Kurt Lamour on 12 December 2005. Azalea 'Pink Ruffles' Location: Shelby, Tennessee. Mycological Research 110,11, November 2006, Pages 1309-1322. A previously unknown Phytophthora was recovered more than 60 times from evergreen hybrid azalea leaves collected during surveys for the sudden oak death pathogen Phytophthora ramorum in California and Tennessee. The novel Phytophthora was discovered when genomic DNA from this species cross-reacted with the ITS-based diagnostic PCR primers used to screen plants for the presence of P. ramorum. This species had caducous, semi-papillate sporangia, was homothallic with both paragynous and amphigynous antheridia, and was pathogenic on both wounded and intact azalea leaves. Nuclear and mitochondrial sequence data indicate that this species is related to, but distinct from, P. ramorum. AFLP analysis indicates that the isolates of this species have limited genotypic diversity and share no markers with P. ramorum. This paper presents the formal description of P. foliorum as a new species and underscores the need for caution when relying solely on DNA-based diagnostic tools.
Available marker sequences
