Halophytophthora fluviatilis sp. nov. from freshwater in Virginia

Authors

  • Xiao Yang,

    Corresponding author
    1. Department of Plant Pathology, Physiology, and Weed Science, Hampton Roads Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, Virginia Beach, VA, USA
    • Correspondence: Xiao Yang, Hampton Roads Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, 1444 Diamond Springs Road, Virginia Beach, Virginia 23455, USA.

      Tel.: +1 757 363 3941;

      fax: +1 757 363 3950;

      e-mail: yxiao9@vt.edu

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  • Chuanxue Hong

    1. Department of Plant Pathology, Physiology, and Weed Science, Hampton Roads Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, Virginia Beach, VA, USA
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Abstract

Halophytophthora fluviatilis, a novel species from inland freshwater in Virginia, is characterized and described in this study. This homothallic species produced ovoid to globose sporangia, which release zoospores directly through exit pores. It grew well in a relatively wide range of salinity from 1.8 to 19.0 parts per thousand. Sequence analysis of the rRNA internal transcribed spacer region placed this new species in the Halophytophthora sensu stricto clade. Description of this new species expanded the habitat to include geographically distinct inland freshwater ecosystems for the genus Halophytophthora, challenging the notion that this genus is marine or brackish. The need to construct a molecular-based taxonomy for the genus Halophytophthora is also discussed.

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