400 research outputs found
Revising the Schizoparmaceae : Coniella and its synonyms Pilidiella and Schizoparme
The asexual genera Coniella (1918) and Pilidiella (1927), including their sexual morphs in Schizoparme (1923), have a cosmopolitan distribution and are
associated with foliar, fruit, leaf, stem and root diseases on a wide variety of hosts. Species of these genera sometimes occur as secondary invaders of plant tissues
infected by other organisms or that are injured by other causes. Several studies published over the last few decades had conflicting ideas as to whether Coniella,
Pilidiella and Schizoparme should be regarded as synonymous or as separate genera. The present study aims to resolve the generic classification of these genera
through phylogenetic analyses of the concatenated alignment of partial LSU nrDNA, rpb2, ITS nrDNA and tef1 sequence data of 117 isolates, combined with their
morphology. Results revealed that all strains cluster in a single well-supported clade. Conidial colour, traditionally the distinguishing character between Coniella and
Pilidiella, evolved multiple times throughout the clade, and is not a good character at generic level in Schizoparmaceae. The three genera should therefore be regarded
as synonymous, with the older name Coniella having priority. Furthermore, this study delineated 13 new species, and new combinations were proposed for a further 15
species.Lourdes V. Alvarez wishes to thank the Department of Science and Technology,
Philippine Council for Industry, Energy and Emerging Technology
Research and Development, Department of Science and Technology (DOSTPCIEERD),
Bicutan, Taguig City, Philippines through the BCDA Fund for the
financial grant awarded to her through the “DOST Administrative Order No.
002, Series of 2014” to undertake this research at the CBS-KNAW Fungal
Biodiversity Centre, Utrecht, The Netherlands.http://www.studiesinmycology.orgam2017Forestry and Agricultural Biotechnology Institute (FABI)Microbiology and Plant Patholog
Pestalotioid fungi from Restionaceae in the Cape Floral Kingdom
Eight pestalotioid fungi were isolated from the Restionaceae
growing in the Cape Floral Kingdom of South Africa. Sarcostroma
restionis, Truncatella megaspora, T.
restionacearum and T. spadicea are newly described.
New records include Pestalotiopsis matildae, Sarcostroma
lomatiae, Truncatella betulae and T. hartigii.
To resolve generic affiliations, phylogenetic analyses were performed on ITS
(ITS1, 5.8S, ITS2) and part of 28S rDNA. DNA data support the original generic
concept of Truncatella, which encompasses Pestalotiopsis
species having 3-septate conidia. The genus Sarcostroma is retained
as separate from Seimatosporium
Phylogenetic reassessment of Mycosphaerella spp. and their anamorphs occurring on Eucalyptus. II.
Species of Eucalyptus are widely planted as exotics in the tropics
and Southern Hemisphere and to some extent in southern Europe, for timber and
fibre production. Species of Mycosphaerella are commonly associated
with leaves and twigs of Eucalyptus and can result in defoliation,
dieback, and even tree death. In the present study, numerous isolates of
Mycosphaerella species were collected from leaf litter, living leaves
exhibiting leaf spot symptoms or severe Mycosphaerella leaf blotch symptoms.
Isolates were compared based on DNA sequence data for the internal transcribed
spacer region (ITS1 & ITS2) and the 5.8S gene. These data, together with
characteristics of the fungal growth on three different media, morphology of
the anamorph and teleomorph structures as well as ascospore germination
patterns were used to describe 21 new species
Eucalyptus microfungi known from culture. 1. Cladoriella and Fulvoflamma genera nova, with notes on some other poorly known taxa
A study of microfungi associated with living Eucalyptus leaves and
leaf litter revealed several novel and interesting taxa. Cladoriella
eucalypti gen. et sp. nov. is described as a Cladosporium-like
genus associated with litter collected in South Africa, while Fulvoflamma
eucalypti gen. et. sp. nov. is newly described from leaf litter collected
in Spain. Beta-conidia are newly reported for species of
Pestalotiopsis, namely Pestalotiopsis disseminata in New
Zealand, and a Pestalotiopsis sp. from Colombia. Satchmopsis
brasiliensis is reported from litter in Colombia and Indonesia, while
Torrendiella eucalypti is reported from leaf litter in Indonesia, and
shown to have a Sporothrix-like anamorph. Leptospora rubella
is reported from living Eucalyptus leaves in Colombia, where it is
associated with leaf spots of Mycosphaerella longibasalis, while
Macrohilum eucalypti is reported from leaf spots of
Eucalyptus in New Zealand
«Phaeomoniella chlamydospora» Gen. et Comb. Nov., a Causal Organism of Petri Grapevine Decline and Esca
Phaeomoniella is proposed as a new hyphomycete genus to accommodate Phaeoacremonium
chlamydosporum, the most important fungal organism associated to Petri grapevine decline. Morphologically the
genus is similar to Phaeoacremonium, but is distinguished from the latter based on its cultural characteristics,
conidiophore morphology, and its uniformly straight, and slightly pigmented conidia. Petri grapevine decline is seen
as an important component of the esca disease complex of grapevines
The genera of fungi - G7 : Hirudinaria
The current paper represents the seventh contribution in the Genera of Fungi series, linking type species of fungal genera to their morphology and DNA sequence data. This manuscript focuses on a genus of dematiaceous hyphomycetes, Hirudinaria. Two species of this genus are treated in this study. Hirudinaria mespili, the type species of the genus, as well as Hirudinaria macrocarpa, are epitypified and provided with DNA sequence data to resolve their phylogeny as members of Mycosphaerellaceae (Mycosphaerellales, Dothideomycetes).The Iranian Research Institute of Plant Protection,
Agricultural Research, Education and Extension Organization (AREEO).https://fuse-journal.orghj2024BiochemistryForestry and Agricultural Biotechnology Institute (FABI)GeneticsMicrobiology and Plant PathologySDG-15:Life on lan
Species of Diaporthe on Camellia and Citrus in the Azores Islands
Species of Diaporthe are important plant pathogens, saprobes, and endophytes on a wide range of plant hosts. Species such as D. citri are well-known on Citrus, as agents of pre- or post-harvest infections, causing dieback, melanose and stem-end rot on fruit. In this study we explored the occurrence and diversity of Diaporthe associated with tropical and sub-tropical plants. In particular, species of Camellia and Citrus were sampled. Surveys were carried out during 2017 in the Azores Islands, Portugal. Ten Diaporthe strains were isolated from symptomatic twigs and leaves. Five representative isolates were subjected to morphological characterization and multi-locus phylogeny based on five genomic loci (ITS, tef1, cal, his3 and tub2). Diaporthe citri was found associated with shoot blight on Citrus reticulata, which represents a new record for Europe. A new species, Diaporthe portugallica sp. nov. was isolated and described from leaf spots on Camellia sinensis
Re-evaluating the taxonomic status of Phaeoisariopsis griseola, the causal agent of angular leaf spot of bean
Angular leaf spot of Phaseolus vulgaris is a serious disease
caused by Phaeoisariopsis griseola, in which two major gene pools
occur, namely Andean and Middle-American. Sequence analysis of the SSU region
of nrDNA revealed the genus Phaeoisariopsis to be indistinguishable
from other hyphomycete anamorph genera associated with
Mycosphaerella, namely Pseudocercospora and
Stigmina. A new combination is therefore proposed in the genus
Pseudocercospora, a name to be conserved over
Phaeoisariopsis and Stigmina. Further comparisons by means
of morphology, cultural characteristics, and DNA sequence analysis of the ITS,
calmodulin, and actin gene regions delineated two groups within P.
griseola, which are recognised as two formae, namely f. griseola
and f. mesoamericana
Cylindrocarpon root rot: multi-gene analysis reveals novel species within the Ilyonectria radicicola species complex
Abstract Ilyonectria radicicola and its Cylindrocarpon-like
anamorph represent a species complex that is commonly
associated with root rot disease symptoms on a range of
hosts. During the course of this study, several species could
be distinguished from I. radicicola sensu stricto based on
morphological and culture characteristics. DNA sequence
analysis of the partial β-tubulin, histone H3, translation
elongation factor 1-α and nuclear ribosomal RNA-Internal
Transcribed Spacer (nrRNA-ITS) genes were employed to
provide further support for the morphological species
resolved among 68 isolates associated with root rot disease
symptoms. Of the various loci screened, nrRNA-ITS
sequences were the least informative, while histone H3
sequences were the most informative, resolving the same
number of species as the combined dataset across the four
genes. Within the Ilyonectria radicicola species complex,
12 new taxa are delineated occurring on a diverse range of hosts, the most common being Cyclamen, Lilium, Panax,
Pseudotsuga, Quercus and Vitis
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