Phytophthora species from declining Austrocedrus chilensis forests in Patagonia, Argentina

GRESLEBIN, A. G.; HANSEN, E.M.; WINTON, L. M.; RAJCHENBERG, M

MYCOLOGIA.

Año: 2005 vol. 97 p. 218 - 228

0027-5514

A survey of Phytophthora spp. in decliningand healthy Austrocedrus chilensis forest was conductedto obtain an overview of the species that inhabitthese forests. Seventeen declining and three healthystands plus 11 associated streams were surveyed. FivePhytophthora species were recovered. P. syringae wasthe most common species isolated from soil and/orstreams at nine declining sites and one healthy site.P. gonapodyides was isolated from streams only, at fivedeclining sites. P. cambivora was isolated from soiland the undescribed taxa ‘P. taxon Pgchlamydo’ and22 ‘P. taxon Raspberry’ were isolated from streams atone declining site each. The species were identifiedby ITS rDNA sequences and morphological features.Brief descriptions of each species and a discussion oftheir possible relationship with ‘‘mal del cipre´s’’ arepresented.Key words: forest decline, ‘‘mal del cipre´s’’, Oomycota,Pythiaceae, soil pathogens