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First report of Newbya recurva (Saprolegniaceae) from India

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In the present report, Newbya recurva (Cornu) Dick and Spencer is isolated, described, illustrated and identified based on morphological characters and phylogenetic analysis of the ITSrDNA region. This formerly Achlya species is mainly recognized by the presence of achlyoid type of zoospore discharge, spherical oogonia with external ornamented wall provided with numerous, stout, symmetrically arranged conical truncate and thin-walled projections/ protrusions at the end (autapomorphic or hallmark feature); large centric or subcentric oospores, which occasionally failed to mature, generally ranging from 1–5 per oogonium, and predominantly androgynous antheridial branches. Apart from these morphological features, the identity of the specimens was further confirmed by ITS-rDNA sequence comparison. The result of phylogenetic analysis supported the prevailing idea that Achlya recurva and N. recurva should be considered a single species in the genus Newbya. A short description, comments, and illustration, accompanied with its comparison with other allied taxa of the genus as well as a molecular phylogeny of the ITS region are provided in this paper. This study also confirms the first report of N. recurva based on morphological as well as analysis of ITS-rDNA from India.
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Keywords: CHANDRA PRABHA WILDLIFE SANCTUARY; MORPHOLOGY; OOMYCOTA; PHYLOGENY; STRAMENOPILES; WATER-MOLD

Document Type: Research Article

Publication date: August 1, 2019

This article was made available online on May 20, 2019 as a Fast Track article with title: "First report of Newbya recurva (Saprolegniaceae) from India".

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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