01643nas a2200169   4500008004100000022001400041245003600055210003600091260001200127300001400139490000700153520117500160100002301335700002001358700001801378856007701396       2012                        eng d  a0066-428600aPhytophthora beyond agriculture0 aPhytophthora beyond agriculture  c09/2012  a359 - 3780 v503 a<p>Little is known about indigenous <em>Phytophthora</em> species in natural ecosystems. Increasing evidence, however, suggests that a diverse, trophically complex <em>Phytophthora</em> community is important in many forests. The number of described species has steadily increased, with a dramatic spike in recent years as new species have been split from old and new species have been discovered through exploration of new habitats. Forest soil, streams, and the upper canopies of trees are now being explored for <em>Phytophthora</em> diversity, and a new appreciation for the ecological amplitude of the genus is emerging. Ten to twenty species are regularly identified in temperate forest surveys. Half or more of this <em>Phytophthora</em> diversity comes from species described since 2000. Taxa in internal transcribed spacer (ITS) Clade 6 are especially numerous in forest streams and may be saprophytic in this habitat. Three ecological assemblages of forest <em>Phytophthora</em> species are hypothesized: aquatic opportunists, foliar pathogens, and soilborne fine-root and canker pathogens. Aggressive invasive species are associated with all three groups.</p>1 aHansen, Everett, M1 aReeser, Paul, W1 aSutton, Wendy  uhttp://www.annualreviews.org/doi/pdf/10.1146/annurev-phyto-081211-17294600505nas a2200145   4500008004100000245008200041210006900123300000900192490000700201100002300208700002200231700001900253700002000272856006700292       2000                        eng d00aManaging Port-Orford-Cedar and the Introduced Pathogen Phytophthora lateralis0 aManaging PortOrfordCedar and the Introduced Pathogen Phytophthor  a4-140 v841 aHansen, Everett, M1 aGoheen, Donald, J1 aJules, Erik, S1 aUllian, Barbara  uhttp://apsjournals.apsnet.org/doi/abs/10.1094/PDIS.2000.84.1.401828nas a2200157   4500008004100000245011300041210006900154300001200223490000800235520128500243100002301528700002101551700002001572700001801592856006001610       2009                        eng d00aPhytophthora rosacearum and P. sansomeana, new species segregated from the Phytophthora megasperma "complex"0 aPhytophthora rosacearum and P sansomeana new species segregated   a129-1350 v1013 a<p>Phytophthora megasperma sensu lato was a conglomeration of morphologically similar but phylogenetically unrelated species. In this paper we continue the segregation of species from the old P. megasperma complex, formally naming two previously recognized isolate groups. Isolates recovered from rosaceous fruit trees (especially apple and cherry) are in ITS clade 6, related to but distinct from P. megasperma sensu strictu. They are named here Phytophthora rosacearum. They have been referred to previously as the "AC" or "high temperature small oospore" group of P. megasperma. A second group of isolates, earlier called "soybean race non-classifiable", recovered from soybeans in Indiana and other Midwestern states, are morphologically similar to P. megasperma sensu strictu but unrelated to that species, falling in ITS clade 8. They are named here P. sansomeana. Isolates recovered from Douglas-fir seedlings in nurseries in the Pacific Northwest and various weedy hosts in New York State, referred to in earlier work as "P. megasperma DF1", appear to be conspecific with the soybean isolates, although they include certain ITS DNA polymorphisms. Both new species are supported by a combination of new and previously published morphological, growth and molecular data.</p>1 aHansen, Everett, M1 aWilcox, Wayne, F1 aReeser, Paul, W1 aSutton, Wendy  uhttp://www.mycologia.org/cgi/content/abstract/101/1/129