Phytophthora austyocedrae sp nov., a new species associated with Austyocedrus chilensis mortality in Patagonia (Argentina)

Phytophthora austrocedrae is a new species isolated from necrotic lesions of stem and roots of Austrocedrus chilensis. it is a homothallic species characterized by semipapillate sporangia, oogonia with amphigynous antheridia, and very slow growth (1-2 mm d(-1) on V-8 agar at 17.5 degrees C optimum temperature). Phylogenetic analysis of ITS rDNA sequence indicates that its closest relative is Phytophthora syringae, another species frequently isolated from soil and streams in A. chilensis forests. (c) 2007 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.