The Phytophthora species assemblage and diversity in riparian alder ecosystems of western Oregon, USA.

Autor:	Sims LL; Oregon State University, Department of Botany and Plant Pathology, Corvallis, Oregon 97330, and University of California, Berkeley, Department of Environmental Science, Policy and Management, Berkeley, California 94704 simslaura@berkeley.edu., Sutton W; Oregon State University, Department of Botany and Plant Pathology, Corvallis, Oregon 97330., Reeser P; Oregon State University, Department of Botany and Plant Pathology, Corvallis, Oregon 97330., Hansen EM; Oregon State University, Department of Botany and Plant Pathology, Corvallis, Oregon 97330.
Jazyk:	angličtina
Zdroj:	Mycologia [Mycologia] 2015 Sep-Oct; Vol. 107 (5), pp. 889-902. Date of Electronic Publication: 2015 Aug 03.
DOI:	10.3852/14-255
Abstrakt:	Phytophthora species were systematically sampled, isolated, identified and compared for presence in streams, soil and roots of alder (Alnus species) dominated riparian ecosystems in western Oregon. We describe the species assemblage and evaluate Phytophthora diversity associated with alder. We recovered 1250 isolates of 20 Phytophthora species. Only three species were recovered from all substrates (streams, soil, alder roots): P. gonapodyides, the informally described "P. taxon Pgchlamydo", and P. siskiyouensis. P. alni ssp. uniformis along with five other species not previously recovered in Oregon forests are included in the assemblage: P.citricola s.l., P. gregata, P. gallica, P. nicotianae and P. parsiana. Phytophthora species diversity was greatest in downstream riparian locations. There was no significant difference in species diversity comparing soil and unwashed roots (the rhizosphere) to stream water. There was a difference between the predominating species from the rhizosphere compared to stream water. The most numerous species was the informally described "P. taxon Oaksoil", which was mainly recovered from, and most predominant in, stream water. The most common species from riparian forest soils and alder root systems was P. gonapodyides. (© 2015 by The Mycological Society of America.)
Databáze:	MEDLINE
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