Leptographium wushanense sp. nov., associated with Tomicus armandii on Pinus armandii in Southwestern China
2020
Pan, Yue | Lu, Jun | Zhou, Xu-Dong | Chen, Peng | Zhang, Huihong | Ye, Hui
Leptographium wushanense sp. nov., which is associated with Tomicus armandii, is described based on molecular sequence data and morphological characters. The phylogenetic analyses based on ITS2-partial LSU rDNA region, β-tubulin and elongation factor 1-α genes showed that L. wushanense formed a well-supported clade and was closely related to L. conjunctum and L. yunnanense, and then nested within L. lundbergii complex. The species is characterized that its conidiophores were longer than those of L. yunnanense and shorter than those of L. conjunctum, while its conidia were larger than those of L. conjunctum and smaller than those of L. yunnanense. Furthermore, the colonial growth of L. wushanense is faster than those of L. conjunctum and L. yunnanense at 25 °C on 2% MEA. Both molecular data and morphological comparison confirmed the placement of the new species in genus of Leptographium.
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