A new species of Phytophthora, previously referred to as the 'Dre I' taxon, is named Phytophthora irrigata. Isolates of P. irrigata morphologically and physiologically resemble Phytophthora drechsleri. They are heterothallic, produce nonpapillate sporangia, and grow well at 35 degrees C. The above two species differ significantly in uniformity of mycelium, presence of chlamydospores, DNA fingerprint, and sequences of multiple nuclear and mtDNA regions. Phytophthora irrigata produces smaller sporangia and a distinct DNA fingerprint. Sequence alignments in the ribosomal DNA internal transcribed spacer regions place Phytophthora fallax and Phytophthora captisoa as its closest relatives. The optimal temperature for culture growth is above 30 degrees C and the maximum temperature is 40 degrees C. This new species is abundant in irrigation reservoirs and natural waterways in Virginia and was also isolated in Pennsylvania.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1574-6968.2008.01226.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
spp. Associated with Appalachian Oak Forests and Waterways in Pennsylvania, with . as a Pathogen of Five Native Woody Plant Species.
Plant Dis
April 2022
Department of Plant Pathology & Environmental Microbiology, Pennsylvania State University, University Park, PA 16802.
To document the distribution of potentially harmful spp. within Pennsylvania, the Pennsylvania Department of Agriculture collected 89 plant, 137 soil, and 48 water samples from 64 forested sites during 2018 to 2020. In total, 231 strains were isolated using baiting assays and identified based on morphological characteristics and sequences of nuclear and mitochondrial loci.
View Article and Find Full Text PDFA high-temperature tolerant species in clade 9 of the genus Phytophthora: P. hydrogena sp. nov.
Mycologia
April 2014
Department of Plant Pathology, Physiology and Weed Science, Hampton Roads Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, Virginia Beach, Virginia 23455.
A previously unknown Phytophthora species was isolated from irrigation water in Virginia, USA. This novel species produces abundant noncaducous and nonpapillate sporangia in soil water extract solution. It sometimes produces chlamydospores and hyphal swellings in aged cultures and in Petri's solution.
View Article and Find Full Text PDFMovement of Phytophthora spp. in Maryland's Nursery Trade.
Plant Dis
January 2014
Plant Science & Landscape Architecture, University of Maryland, College Park 20742.
Phytophthora spp. cause major losses in the nursery industry worldwide. However, a clear demonstration of the route of movement has not been previously shown.
View Article and Find Full Text PDFOomycetes baited from streams in Tennessee 2010-2012.
Mycologia
January 2014
Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, Tennessee 37996.
Sixteen streams in middle and eastern Tennessee were surveyed for the sudden oak-death pathogen Phytophthora ramorum 2010-2012. Surveys were conducted in the spring and fall using healthy Rhododendron leaves, and a total of 354 oomycete isolates were recovered. Sequence analysis of the ITS region provisionally identified 151 Phytophthora, 200 Pythium, two Halophytophthora and one Phytopythium.
View Article and Find Full Text PDFPhytophthora aquimorbida sp. nov. and Phytophthora taxon 'aquatilis' recovered from irrigation reservoirs and a stream in Virginia, USA.
Mycologia
November 2012
Virginia Polytechnic Institute and State University, Hampton Roads Agricultural Research and Extension Center, Virginia Beach, VA 23455, USA.
Two distinct subgroups (L2 and A(-2)) were recovered from irrigation reservoirs and a stream in Virginia, USA. After molecular, morphological and physiological examinations, the L2 subgroup was named Phytophthora aquimorbida and the A(-2) designated as Phytophthora taxon 'aquatilis'. Both taxa are homothallic.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!