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Wei J.-G.,Guangxi University | Phan C.-K.,Guangxi University | Wang L.,Guangxi University | Xu T.,Zhejiang University | And 3 more authors.
Mycological Progress | Year: 2013

Pestalotiopsis is a common and important plant-associated pathogen and endophyte with wide geographical and host distribution. In an investigation of endophytic Pestalotiopsis species associated with Podocarpaceae in China, a new species Pestalotiopsis yunnanensis was isolated from Podocarpus macrophyllus in Kunming, southwestern China. This new species produced pycnidium-like conidiamata in culture, distinct from its morphologically similar species, P. funereoides, P. funerea and P. thujae, which produce acervuli in manual media and hosts. P. yunnanensis also possesses a greater conidium length/width ratio, and longer apical and basal appendages as its distinguishing morphology characters. Phylogenetic analysis of internal transcribed spacer (ITS) sequences showed that P. yunnanensis is a member of Pestalotiopsis, and is distinct from morphologically similar P. funereoides, P. funerea, and P. thujae, as well as other Pestalotiopsis species. A dichotomous key to 26 Pestalotiopsis species occurring on Podocarpus plants is also presented. © 2012 German Mycological Society and Springer-Verlag Berlin Heidelberg.


Long Y.-Y.,Guangxi University | Wei J.-G.,Guangxi University | Sun X.,CAS Institute of Microbiology | He Y.-Q.,Yunnan Agricultural University | And 2 more authors.
Mycological Progress | Year: 2012

In an investigation of Pythium species in lawn grassland of south China, two new species, Pythium breve and P. baisense, were identified based on morphological characteristics and DNA sequence data. These two new species differ morphologically from the other Pythium species by the oogonia encompassed by many antheridia and with 1-3 antheridia on the wavy and curved stalks. Furthermore, P. baisense with complexly lobed antheridial stalks differs from P. breve with antheridial stalks entwining the hyphae nearby the oogonia with several turns. Results of phylogenetic analyses showed that these two new species were clearly separated from morphologically similar Pythium species based on the internal transcribed spacer region (ITS1, 5. 8S, ITS2) and cytochrome c oxidase subunit I (COXI) gene sequences using maximum parsimony and Bayesian methods. These two new species are described and illustrated in detail. © 2011 German Mycological Society and Springer.

Loading Forest Pest and Disease Control Station of Guangxi collaborators
Loading Forest Pest and Disease Control Station of Guangxi collaborators