Galiellalactone and its biogenetic precursors as chemotaxonomic markers of the Sarcosomataceae (Ascomycota)

Köpcke, Bärbel; Weber, Roland W.S.; Anke, Heidrun

doi:10.1016/s0031-9422(02)00193-0

Cited by 36 publications

(30 citation statements)

References 14 publications

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“…Endophytes were isolated from surface-sterilized living plant material as described by Kö pcke et al (2002a), cultivated on YMG, and incorporated into the Culture Collection (Department of Biotechnology, University of Kaiserslautern). For initial screening, fungi were inoculated into 1000 ml flasks with four indentations, containing 500 ml YMG medium (4 g yeast, 10 g glucose, 10 g malt extract/l; pH 5.5 before autoclaving) and incubated at 22°C with shaking (120 rpm).…”

Section: Organisms and Culture Conditionsmentioning

confidence: 99%

3-Hydroxypropionic acid as a nematicidal principle in endophytic fungi

et al. 2004

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Section: Organisms and Culture Conditionsmentioning

confidence: 99%

3-Hydroxypropionic acid as a nematicidal principle in endophytic fungi

et al. 2004

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“…Up to the present, only two nematicidal metabolites produced by endophytes have been reported. Pregaliellalactone, a hexaketide metabolite which had been isolated from several fungi, including an endophytic fungus E99297 (AF485074), showed nematicidal activity (Köpcke et al, 2002a;2002b). 3-Hydroxypropionic acid, obtained from several endophytic fungi, showed selective nematicidal activity against the plant-parasitic nematode Meloidogyne incognita (Schwarz et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Nematicidal endophytic bacteria obtained from plants

Zheng

Wang

et al. 2008

Ann. Microbiol.

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Two hundred and six bacterial isolates were obtained from leaf, flower and stem of three healthy plants, Euphorbia pulcherrima Willd, Pyrethrum cinerariifolium Trev. and Heracleum candicans Wall. The nematicidal activity experiment showed that a total of 92 isolates displayed activity against Caenorhabditis elegans (Maupas) Dougherty, and 70 isolates resulted active against Bursaphelenchus xylophilus (Steiner & Buhrer) Nickle. Strain LCB-3 exhibited the strongest nematicidal activity against both two nematodes. According to the 16S rDNA, the strain LCB-3 was identified as Brevundimonas diminuta. Based on bioassay-guided fractionation, a nematicidal metabolite (R)-(-)-2-ethylhexan-1-ol was obtained from LCB-3. The median lethal concentrations (LC 50 ) of the compound were 542.0 mg l -1 against C. elegans and 168.1 mg l -1 against B. xylophilus 48 h after treatment.

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“…The taxonomic position of this species, however, is questionable. It lacks the ability to produce the hexaketide galiellalactone, which is believed to be a chemotaxonomic marker for the family sensu stricto (28). All of these mitosporic forms, therefore, represent nontypical members of their respective taxa.…”

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confidence: 99%

Detection and Identification of Fungi Intimately Associated with the Brown SeaweedFucus serratus

Zuccaro

Schoch

Spatafora

et al. 2008

Appl Environ Microbiol

143

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The filamentous fungi associated with healthy and decaying Fucus serratus thalli were studied over a 1-year period using isolation methods and molecular techniques such as 28S rRNA gene PCR-denaturing gradient gel electrophoresis (DGGE) and phylogenetic and real-time PCR analyses. The predominant DGGE bands obtained from healthy algal thalli belonged to the Lindra, Lulworthia, Engyodontium, Sigmoidea/Corollospora complex, and Emericellopsis/Acremonium-like ribotypes. In the culture-based analysis the incidence of recovery was highest for Sigmoidea marina isolates. In general, the environmental sequences retrieved could be matched unambiguously to isolates recovered from the seaweed except for the Emericellopsis/Acremonium-like ribotype, which showed 99% homology with the sequences of four different isolates, including that of Acremonium fuci. To estimate the extent of colonization of A. fuci, we used a TaqMan real-time quantitative PCR assay for intron 3 of the beta-tubulin gene, the probe for which proved to be species specific even when it was used in amplifications with high background concentrations of other eukaryotic DNAs. The A. fuci sequence was detected with both healthy and decaying thalli, but the signal was stronger for the latter. Additional sequence types, representing members from the Dothideomycetes, were recovered from the decaying thallus DNA, which suggested that a change in fungal community structure had occurred. Phylogenetic analysis of these environmental sequences and the sequences of isolates and type species indicated that the environmental sequences were novel in the Dothideomycetes.Coastal macrophytes are part of highly productive ecosystems and have essential functions in nutrient cycling and habitat structuring (8,30). Helgoland intertidal marine seaweed populations are dominated by fucoids with diverse associated biocenoses. The complex communities that develop in these systems provide models for investigating algafungus interactions in a natural environment. Pathogens and parasites are the predominant fungi in seaweed communities that have been described (47); however, most of these organisms cannot be cultured in the laboratory and are known only from herbarium specimens (26, 39). Other algicolous fungi include saprobes and mycobionts, and there is little information on the autecology of these organisms. Studies of the interactions between these fungi and their algal hosts, therefore, can be effectively undertaken only by using a molecular approach to detect and differentiate between environmental signal sequences.In a preliminary study of fungi associated with Fucus serratus, Zuccaro et al. (48) developed and described a PCRdenaturing gradient gel electrophoresis (DGGE) system, using novel fungus-specific primers that amplified the second domain (D2) of the nuclear large rRNA region. Fungal sequences retrieved from algal tissue matched sequences from ascomycetous groups known to be active in marine environments, as well as sequences from a group of isolates belonging to the genu...

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Galiellalactone and its biogenetic precursors as chemotaxonomic markers of the Sarcosomataceae (Ascomycota)

Cited by 36 publications

References 14 publications

3-Hydroxypropionic acid as a nematicidal principle in endophytic fungi

3-Hydroxypropionic acid as a nematicidal principle in endophytic fungi

Nematicidal endophytic bacteria obtained from plants

Detection and Identification of Fungi Intimately Associated with the Brown SeaweedFucus serratus

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