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Mycological Progress

, Volume 11, Issue 3, pp 689–698 | Cite as

Two new Pythium species from China based on the morphology and DNA sequence data

  • Yan-Yan Long
  • Ji-Guang Wei
  • Xiang Sun
  • Yue-Qiu He
  • Ji-Tong Luo
  • Liang-Dong GuoEmail author
Original Article

Abstract

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.

Keywords

Pythium breve Pythium baisense Morphology ITS COXI 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 30670012), the Guangxi Natural Science Foundation (No. 0640013) and the Plans for Construction of Scientific Topnotch and Innovation Team in Guangxi University.

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Copyright information

© German Mycological Society and Springer 2011

Authors and Affiliations

  • Yan-Yan Long
    • 1
  • Ji-Guang Wei
    • 1
  • Xiang Sun
    • 2
  • Yue-Qiu He
    • 3
  • Ji-Tong Luo
    • 4
  • Liang-Dong Guo
    • 2
    Email author
  1. 1.College of AgricultureGuangxi UniversityNanningPeople’s Republic of China
  2. 2.State Key Laboratory of Mycology, Institute of MicrobiologyChinese Academy of SciencesBeijingPeople’s Republic of China
  3. 3.Key Laboratory of Agricultural Biodiversity and Pests Control, Ministry of EducationYunnan Agricultural UniversityKunmingPeople’s Republic of China
  4. 4.Forest Pest and Disease Control Station of GuangxiNanningPeople’s Republic of China

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