Nothophytophthora gen. nov., a new sister genus of Phytophthora from natural and semi-natural ecosystems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F17%3A43911611" target="_blank" >RIV/62156489:43410/17:43911611 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3767/persoonia.2017.39.07" target="_blank" >https://doi.org/10.3767/persoonia.2017.39.07</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3767/persoonia.2017.39.07" target="_blank" >10.3767/persoonia.2017.39.07</a>

Result language

angličtina

Original language name

Nothophytophthora gen. nov., a new sister genus of Phytophthora from natural and semi-natural ecosystems

Original language description

During surveys of Phytophthora diversity in Europe, Chile and Vietnam slow growing oomycete isolates were obtained from rhizosphere soil samples and small streams in forest stands. Phylogenetic analyses of sequences from the nuclear ITS, LSU, β-tubulin and HSP90 loci and the mitochondrial cox1 and NADH1 genes revealed they belong to a new genus, described here as Nothophytophthora gen. nov., clustered as sister group to Phytophthora. Nothophytophthora shares numerous morphological characters with Phytophthora: persistent (all Nothophytophthora spp.) and caducous (N. caduca, N. chlamydospora, N. valdiviana, N. vietnamensis) sporangia with variable shapes, internal differentiation of zoospores and internal, nested and extended (N. caduca, N. chlamydospora) and external (all Nothophytophthora spp.) sporangial proliferation; smooth-walled oogonia with amphigynous (N. amphigynosa) and paragynous (N. amphigynosa, N. intricata, N. vietnamensis) attachment of the antheridia; chlamydospores (N. chlamydospora) and hyphal swellings. Main differing features of the new genus are the presence of a conspicuous, opaque plug inside the sporangiophore close to the base of most mature sporangia in all known Nothophytophthora species and intraspecific co-occurrence of caducity and non-papillate sporangia with internal nested and extended proliferation in several Nothophytophthora species. Production of caducous sporangia by N. caduca, N. chlamydospora and N. valdiviana from Valdivian rainforests and N. vietnamensis from a mountain forest in Vietnam suggests a partially aerial lifestyle as adaptation to these humid habitats. Presence of tree dieback in all forests from which Nothophytophthora is recovered and partial sporangial caducity of several species indicate a pathogenic rather than a saprophytic lifestyle. Isolation tests from symptomatic plant tissues in these forests and pathogenicity tests are urgently required to clarify the lifestyle of the six Nothophytophthora species.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10612 - Mycology

Project

<a href="/en/project/EF15_003%2F0000453" target="_blank" >EF15_003/0000453: Phytophthora Research Centre</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Persoonia

ISSN

0031-5850

e-ISSN

—

Volume of the periodical

39

Issue of the periodical within the volume

7 August

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

32

Pages from-to

143-174

UT code for WoS article

000419997300007

EID of the result in the Scopus database

2-s2.0-85033792372