Journal
FUNGAL BIOLOGY
Volume 121, Issue 1, Pages 1-10Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.funbio.2016.08.008
Keywords
Lattice; Morphology; Nomenclature; Parasitism; Taxonomy; Zoospore
Categories
Funding
- National Science Foundation through MRI (The University of Alabama) [DEB-0500766, DEB-1455611, DEB-1354625]
- Sao Paulo Research Foundation FAPESP [2015/05596-4]
- JEL culture collection at the University of Maine
- Direct For Biological Sciences [1354625] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Division Of Environmental Biology [1455611] Funding Source: National Science Foundation
- Division Of Environmental Biology [1354625] Funding Source: National Science Foundation
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Rozella is a genus of unwalled endoparasites of a variety of hosts including Oomycota (Stramenopiles), Blastocladiomycota and Chytridiomycota (Fungi), and one green alga (Coleochaete, Chlorophyceae). It currently includes more than 20 formally described species, and no new species of Rozella have been described since 1987. We discovered a new Rozella species parasitizing Rhizoclosmatium globosum (Chytridiales, Chytridiomycota) and investigated its morphology, ultrastructure, and phylogenetic position. Herein named as Rozella rhizoclosmatii sp. nov., the organism induces hypertrophy of the host. Its zoospore is ultra structurally similar to that of Rozella allomycis, although it has a unique zoospore ultrastructural feature, a lattice of perpendicular rods about the nucleus. The 18S rDNA molecular sequence of R. rhizoclosmatii is similar to that of the previously sequenced 'Rozella ex Rhizoclosmatium'. This is the first study to inclusively characterize a new species of Rozella with morphological, ultrastructural and molecular data. As this is only the second Rozella species to be examined ultrastructurally, and because it is parasitic on a member of Chytridiomycota and not Blastocladiomycota, this research supports the conservative nature of zoospore ultrastructure to help define the genus. (C) 2016 British Mycological Society. Published by Elsevier Ltd. All rights reserved.
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