1. Isolation and identification of <italic>Sydowia polyspora</italic> and its pathogenicity on <italic>Pinus yunnanensis</italic> in Southwestern China.
- Author
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Pan, Yue, Ye, Hui, Lu, Jun, Chen, Peng, Zhou, Xu‐Dong, Qiao, Min, and Yu, Ze‐Fen
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MICROBIAL virulence , *PINUS kesiya , *TOMICUS , *ENDOPHYTIC fungi , *PHLOEM - Abstract
Abstract:
Sydowia polyspora occurs often as an epiphyte or endophyte of conifers and is widely distributed around the world. It is also reported as a fungus associated with bark beetles. In this study, based on ITS sequence data and morphological characteristics, 14 strains collected from the beetle bodies and galleries ofTomicus minor andTomicus yunnanensis infestingPinus yunnanensis in Southwestern China were identified asS. polyspora . To assess the virulence ofS. polyspora toP. yunnanensis , pathogenicity tests were conducted by inoculating the fungus in the stems and on needles ofP. yunnanensis . The results after 30 days showed that the lesion lengths in the phloem after inoculation withS. polyspora were significantly longer than for the control. In addition, the fungus caused partly distinct chlorisis or discolouration of needles 14 days after inoculation. This suggests thatS. polyspora is able to colonize stem phloem and pine needles ofP. yunnanensis and thus may cause secondary damages to this host after being spread with bark beetles. [ABSTRACT FROM AUTHOR]- Published
- 2018
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