@ARTICLE{TreeBASE2Ref16392, author = {Saranya Limkaisang and James H. Cunnington and Kon Wui Liew and Baharuddin Salleh and Yukio Sato and Rangsi Divarangkoon and Wanwisa Fangfuk and Chaiwat To-anun and Susumu Takamatsu}, title = {Molecular phylogenetic analyses reveal a close relationship between powdery mildew fungi on some tropical trees and Erysiphe alphitoides, an oak powdery mildew}, year = {2006}, keywords = {}, doi = {10.1007/s10267-005-0238-8}, url = {}, pmid = {}, journal = {Mycoscience}, volume = {46}, number = {4}, pages = {220 -- 226}, abstract = {To investigate the phylogenetic relationships among the powdery mildew fungi of some economically important tropical trees belonging to Oidium subgenus Pseudoidium, we conducted molecular phylogenetic analyses using 30 DNA sequences of the rDNA internal transcribed spacer (ITS) regions and 26 sequences of the domains D1 and D2 of the 28S rDNA obtained from the powdery mildews on Hevea brasiliensis (para rubber tree), Anacardium occidentale (cashew), Bixa orellana, Citrus spp., Mangifera indica (mango), and Acacia spp. The results indicate that the powdery mildew fungi isolated from these tropical trees are closely related to one another. These powdery mildews are also closely related to E. alphitoides (including Erysiphe sp. on Quercus phillyraeoides). Due to the obligate biotrophic nature of the powdery mildew fungi, the relationship between powdery mildews and their host plants is conservative. But, the present study suggests that a particular powdery mildew species expanded its host ranges on a wide range of the tropical trees. This paper also suggests that a powdery mildew fungus distributed in temperate regions of the Northern Hemisphere expanded its host ranges onto tropical plants, and may be a good example of how geographic and host range expansion has occurred in the Erysiphales.} }

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