''Achlya'' is a genus of

oomycete Oomycota forms a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms, called oomycetes (). They are filamentous and heterotrophic, and can reproduce both sexually and asexually. Sexual reproduction of an oospore is the resul ...

(water mold). The genus includes several plant pathogens including '' Achlya conspicua'' and '' Achlya klebsiana''. Unlike many other microorganisms, cell expansion is governed by changes in cell wall strength rather than changes in osmotic pressure. The genome of '' Achlya hypogyna'' has been sequenced and can be accessed on public online databases, for example on the NCBI website (

National Center for Biotechnology Information The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. T ...

). The genus was first described in 1823 by

Christian Gottfried Daniel Nees von Esenbeck Christian Gottfried Daniel Nees von Esenbeck (14 February 1776 – 16 March 1858) was a prolific German botanist, physician, zoologist, and natural philosopher. He was a contemporary of Goethe and was born within the lifetime of Linnaeus. ...

. The type species is ''

Achlya prolifera ''Achlya'' is a genus of oomycete (water mold). The genus includes several plant pathogens including '' Achlya conspicua'' and '' Achlya klebsiana''. Unlike many other microorganisms, cell expansion is governed by changes in cell wall strength r ...

''. Several ''Achyla'' spp. are pathogens of rice

seedling A seedling is a young sporophyte developing out of a plant embryo from a seed. Seedling development starts with germination of the seed. A typical young seedling consists of three main parts: the radicle (embryonic root), the hypocotyl (emb ...

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