Phytophthora species from declining Austrocedrus chilensis forests in Patagonia, Argentina

• Published in: Mycologia 2005, Vol.97 (1), p.218-228
• Main Authors: Greslebin, Alina G., Hansen, Everett M., Winton, Loretta M., Rajchenberg, Mario
• Format: Article
• Language: English
• Subjects: "mal del ciprés"; aquatic fungi; Argentina; Austrocedrus chilensis; Coniferophyta - growth & development; Coniferous forests; Deciduous forests; forest decline; Forest soils; Forest stands; forest trees; fungal anatomy; internal transcribed spacers; Libocedrus chilensis; Molecular Sequence Data; molecular systematics; Oomycota; phylogeny; Phytophthora; Phytophthora - classification; Phytophthora - genetics; Phytophthora - isolation & purification; Phytophthora cambivora; Phytophthora gonapodyides; Phytophthora syringae; Phytophthora taxon; Plant diseases; Plant Diseases - microbiology; Plant Pathogens; Plant roots; Pythiaceae; ribosomal DNA; Rivers - microbiology; sequence analysis; Sequence Analysis, DNA; soil fungi; Soil Microbiology; soil pathogens; Sporangia; Swelling; Taxa; Trees
• ISSN: 0027-5514; 1557-2536
• DOI: 10.1080/15572536.2006.11832855

A survey of Phytophthora spp. in declining and healthy Austrocedrus chilensis forest was conducted to obtain an overview of the species that inhabit these forests. Seventeen declining and three healthy stands plus 11 associated streams were surveyed. Five Phytophthora species were recovered. P. syringae was the most common species isolated from soil and/or streams at nine declining sites and one healthy site. P. gonapodyides was isolated from streams only, at five declining sites. P. cambivora was isolated from soil and the undescribed taxa 'P. taxon Pgchlamydo' and 22 'P. taxon Raspberry' were isolated from streams at one declining site each. The species were identified by ITS rDNA sequences and morphological features. Brief descriptions of each species and a discussion of their possible relationship with "mal del ciprés" are presented.