Clovis Douanla-Meli

Clovis Douanla-Meli
Julius Kühn-Institut · Institute for National and International Plant Health

Dr

About

35
Publications
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596
Citations
Introduction
Additional affiliations
April 2013 - present
Julius Kühn-Institut, Federal Research Centre for Cultivated Plants
Position
  • Mycology

Publications

Publications (35)
Article
Full-text available
Tropical palm foliage is increasingly imported to satisfy the steady growing demand in European floristry. This palm foliage presumably carries along diverse fungi whose taxonomic and functional diversity have not been addressed so far. The present study investigated Botryosphaeriaceae fungi associated with the foliage of palm species Chamaedorea e...
Article
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Two new natural products, mitrafungidione (1) elucidated as prototrop-isomers of ( R-3-acetyl-5-ethyl-4-hydroxy-5 H-furan-2-one, and maristachone F (2a), elucidated as 5-(1-hydroxyethyl)-4-(hydroxymethyl)-3-methoxy-2-methylphenol, together with 5 known compounds have been isolated from the solid cultures of an endophytic fungus associated with Mitr...
Article
In April 2019, the JKI was officially designated as the National Reference Laboratory (NRL) for organisms harmful to plants by the Federal Ministry of Food and Agriculture (BMEL). This function as NRL for Germany is associated with certain responsibilities and tasks, which are specified in the EU Regulation 2017/625 (EU, 2017). This also includes r...
Article
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Fusarium circinatum is a harmful pathogenic fungus mostly attacking Pinus species and also Pseudotsuga menziesii, causing cankers in trees of all ages, damping-off in seedlings, and mortality in cuttings and mother plants for clonal production. This fungus is listed as a quarantine pest in several parts of the world and the trade of potentially con...
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Nomenclatural type definitions are one of the most important concepts in biological nomenclature. Being physical objects that can be re-studied by other researchers, types permanently link taxonomy (an artificial agreement to classify biological diversity) with nomenclature (an artificial agreement to name biological diversity). Two proposals to am...
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Colletotrichum cliviae is a fungal species reported both as pathogen and endophyte with broad geographical distribution. Some purported isolates of this species have been assigned to different taxa, including Colletotrichum aracearum, Colletotrichum orchidearum and Colletotrichum. sichuanensis, for which a preliminary analysis of extensive multiloc...
Article
Colletotrichum species associated with citrus fruits are fragmentarily known and it lacks accordingly accurate information on the diversity carried alongside the trade of these commodities from producer countries to Europe. In this study, we investigated the molecular phylogenetic diversity, colonisation, and prevalence of Colletotrichum isolated f...
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Background The continuous emergence of multidrug-resistant (MDR) bacteria drastically reduced the efficacy of our antibiotic armory and consequently, increased the frequency of therapeutic failure. The search for bioactive constituents from endophytic fungi against MDR bacteria became a necessity for alternative and promising strategies, and for th...
Article
A new dimeric naphtho-γ-pyrone, 2-hydroxydihydronigerone (1), along with five compounds, nigerone (2), pyrophen (3), kojic acid (4), 4-(hydroxymethyl)-5-hydroxy-2H-pyran-2-one (5), and p-hydroxyphenylacetic acid (6), was isolated from an endophytic fungus Aspergillus niger AKRN associated with the roots of Entandrophragma congoënse. The structure o...
Article
Three new polyketides named penialidins A-C (1-3), along with one known compound, citromycetin (4), were isolated from an endophytic fungus, Penicillium sp., harbored in the leaves of the Cameroonian medicinal plant Garcinia nobilis. Their structures were elucidated by means of spectroscopic and spectrometric methods (NMR and HRMS(n)). The antibact...
Article
A new depsidone, namely chaetosidone A (1), together with six known fungal metabolites were obtained from a culture of Chaetomium sp., an endophytic fungus isolated from Zanthoxylum leprieurii leaves. The structure of the new compound 1 was elucidated using MS and NMR experiments, and by biosynthetic considerations. Chaetosidone A (1) is the missin...
Article
Two unusual dibenzofurans, preussiafurans A-B (1-2), together with six known compounds have been isolated from the fungus Preussia sp. occurring in Enantia chlorantha Oliv. The structures were established on the basis of 1D and 2D NMR spectroscopy and MS analysis. Compounds 1-4 showed antiplasmodial activity against erythrocytic stages of chloroqui...
Article
Three a-pyrone derivatives, campyrones AeC (1e3), were isolated from Aspergillus niger, an endophytic fungus occurring in Zanthoxylum lemairei leaves. Their structures were elucidated by detailed spectroscopic and spectrometric analyses and confirmed by X-ray diffraction. The absolute configurations were assigned by a combination of circular dichro...
Article
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Fungal endophytes on citrus plants have been little studied, and the effects of citrus diseases on their incidence and diversity have not been addressed. In this study, we examined the foliar fungal endophytes of Citrus limon in the vicinity of Yaoundé, Cameroon, with emphasis on the differences between endophyte communities in healthy and yellowin...
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In our search for secondary metabolites regulating the motility behavior of zoospores of the grapevine downy mildew pathogen Plasmopara viticola, we found that extracts from an endophytic fungus Phomopsis sp. CAFT69 and its host plant Endodesmia calophylloides remarkably impaired motility of zoospores followed by lysis. The active principles in the...
Article
Plants of Diospyros spp. produce many bioactive compounds and are used for medicinal purposes. However, the diversity of their associated fungal endophytes, which are also potential sources of bioactive metabolites, has not been investigated. In this study, fungal endophytes isolated by culturing method from healthy leaves, fruit and root tissues o...
Article
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Paeciloside A (1) and eight known compounds, acremoauxin A (2), farinosones A (3) and B (4), 1,5-dideoxy-3-C-methyl-arabitol (5), ergosterol, ergosterol peroxide, cerebroside C, and adenosine, were isolated from cultures of Paecilomyces sp. CAFT156, an endophytic fungus occurring in Enantia chlorantha Oliv (Annonaceae) leaves. The structure of the...
Article
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Phellinus gabonensis sp. nov. is described and illustrated on the basis of several collections made in three protected areas of primary rain forest in the western edge of the Guineo–Congolian center of endemism, in Gabon. The species is characterized by resupinate, perennial basidiomes, numerous, straight to commonly apically hooked hymenial setae,...
Article
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Hypochnella verrucospora sp. nov. is described and illustrated from material collected in Brazil and Argentina. The new species is characterized by dark purplish, violaceous to dark lilaceous, resupinate and membranous basidiomes and ellipsoid to subcylindrical, pale brown, slightly thick-walled, amyloid and delicately ornamented basidiospores. The...
Article
Lentinoid fungi characterised by villosity of pileus and/or stem mostly belong to the genera Lentinus and Panus. However, morphology-based taxonomy of some of these species has remained controversial and they used to be classified back and forth between the two genera. The aim of this study was to investigate the phylogenetic relationships of these...
Article
Based on fungal material collected in the Mbalmayo Forest Reserve, Cameroon, two Russulaceae for which the specimens could not be satisfactorily placed to any known species, are described as new to science. Lactarius dewevrei is strikingly characterised by the entire blackish to dark date brown basidiomata and winged basidiospores with broad branch...
Article
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A new species Ganoderma carocalcareus (Basidiomycota, Ganodermataceae) was collected on living trunk and dead stumps of Anthocleista nobilis (Gentianaceae) in waterlogged swamps in the Mbalmayo Forest Reserve, Cameroon, and identified on the basis of morphology and phylogenetic analyses inferred from mitochondrial small subunit (mtSSU) and internal...
Article
Three new species of corticioid fungi Phlebiopsis bicornis, Schizopora crassihypha and Stecchericium dimiticum from the Mbalmayo Forest Reserve, Cameroon, are described, illustrated in detail and discussed.
Article
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Among fungal isolates from seeds of Diospyros crassiflora, one showed cultural and microscopic features of Pestalotiopsis species. DNA-sequence comparison and phylogenetic analyses using nucleotide sequences of internal transcribed spacer (ITS1-5.8S-ITS2) and the portion of nuclear large subunit (nuc-LSU) rDNA identified it as Pestalotiopsis theae....
Article
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The pantropical genus Penicilliopsis (Trichocomaceae) currently contains three seminicolous species common on species of Diospyros. P. africana is known from Cameroon as Stilbodendron camerunense anamorph-holotype. During mycobiota forays in the Mbalmayo Forest Reserve, material of a seminicolous fungus collected and isolated from seeds of Diospyro...
Article
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Marasmius mbalmayoensis (Basidiomycotina, Marasmiaceae) growing on decayed leaves of Canarium schweinfurthii in the Mbalmayo Forest Reserve, Cameroon, is described. The species is remarkable due to the large basidiomata with shallow orange yellow umbilicus, long central stipe accompanied by similar long rhizomorphs on thickened basal mycelium and l...
Article
A new species of Hymenochaetaceae, Phylloporia resupinatus, and two new species of Polyporaceae, Coriolopsis antleroides and Nigroporus stipitatus, are described and illustrated from material collected in the Mbalmayo Forest Reserve, Cameroon. C. antleroides is characterised by antler-like, digitate to coralloid erect protuberances on the pileus su...
Article
An unusual species of Geastrum was found growing on decayed wood debris and leaves of Triplochiton scleroxylon in the Mbalmayo Forest Reserve, Cameroon. The species morphologically resembles G. saccatum and G. fimbriatum in having sessile endosperidium partly enclosed by the saccate base of the exoperidium. Microscopically, it is characterized by a...
Article
Eight species of Discomycetes in the orders Helotiales and Pezizales are reported from Mbalmayo rain forest reserve in southern Cameroon. Families represented include the Geoglossaceae (Trichoglossum hirsutum), Otideaceae (Scutellinia colensoi and S. scutellata), Sarcoscyphaceae (Cookeina colensoi, C. insititia, C. speciosa and C. tricholoma), Sarc...
Article
Two species of Cymatoderma, ten species of Podoscypha and three species of Stereopsis are recorded from the Mbalmayo forest reserve, Cameroon. C. elegans, P. nitidula, P. petalodes subsp. rosulata, P. simulans, S. hiscens f. rosea and S. radicans are new to Cameroon. P. disseminata sp. nov. is described and illustrated. A key to species of Podoscyp...
Article
Lignosus ekombitii is described as new based on a collection from Cameroon. It differs from L. sacer in having smaller and thinner pileus with longer and more slender stipe, oblong-ellipsoid to cylindrical and longer spores. Macro and microscopic features are illustrated. A key to species of Lignosus is provided.

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