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  1. Book ; Online: Transcription profiling by array of wheat after inoculation with Puccinia triticina, Puccinia hordei or mock-inoculation to identify candidate genes for nonhost resistance against rust disease

    Delventhal, Rhoda / Niks, R.E.

    2017  

    Abstract: In this experiment the transcriptome reprogramming in wheat during host and nonhost interaction with Puccinia sp. was analyzed in a time-series approach. Ten days old wheat plants of cv. Renan were mock-inoculated or inoculated with P. triticina (Pt), ... ...

    Abstract In this experiment the transcriptome reprogramming in wheat during host and nonhost interaction with Puccinia sp. was analyzed in a time-series approach. Ten days old wheat plants of cv. Renan were mock-inoculated or inoculated with P. triticina (Pt), BRW96258 isolate, or P. hordei (Ph), 1.2.1 isolate. After 12, 24, 36 and 48 hours first leaves were sampled. Total RNA was extracted using the RNeasy Plant Mini Kit (Qiagen, Hilden, Germany), the Ambion TURBO DNA-free DNase Kit was used for DNA elimination, and RNA was hybridized to Agilent 44k oligonucleotide arrays.
    Keywords Triticum aestivum
    Publisher RWTH Aachen University
    Publishing country nl
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Transcription profiling by array of barley after inoculation with Puccinia hordei, Puccinia triticina or mock-inoculation to identify candidate genes for nonhost resistance against rust disease

    Delventhal, Rhoda / Niks, R.E.

    2017  

    Abstract: In this experiment the transcriptome reprogramming in barley during host and nonhost interaction with Puccinia sp. was analyzed in a time-series approach. Ten days old barley plants of cv. Vada were mock-inoculated or inoculated with P. hordei (Ph), 1.2 ... ...

    Abstract In this experiment the transcriptome reprogramming in barley during host and nonhost interaction with Puccinia sp. was analyzed in a time-series approach. Ten days old barley plants of cv. Vada were mock-inoculated or inoculated with P. hordei (Ph), 1.2.1 isolate, or P. triticina (Pt), BRW96258 isolate. After 12, 24, 36 and 48 hours first leaves were sampled. Total RNA was extracted using the RNeasy Plant Mini Kit (Qiagen, Hilden, Germany), the Ambion TURBO DNA-free DNase Kit was used for DNA elimination, and RNA was hybridized to Agilent 44k oligonucleotide arrays.
    Keywords Hordeum vulgare
    Publisher RWTH Aachen University
    Publishing country nl
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Book ; Online: Vergleich der Wirt- und Nichtwirt-Interaktion von Gerste mit verschiedenen Magnaporthe-Arten anhand von histologischen Untersuchungen, Transkriptomstudien und funktionalen Genanalysen

    Delventhal, Rhoda / Schaffrath, Ulrich / Slusarenko, Alan

    2015  

    Title variant Comparison of the host and nonhost interaction of barley with different Magnaporthe species by histological investigations, transcriptomics and functional gene analyses
    Author's details Rhoda Delventhal ; Ulrich Schaffrath, Alan Slusarenko
    Language German
    Size 1 Online-Ressource
    Publisher Universitätsbibliothek der RWTH Aachen
    Publishing place Aachen
    Document type Book ; Online
    Database Special collection on veterinary medicine and general parasitology

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  4. Book ; Online: 2. Aktualisierung der Übersicht über Nutz- und Zierpflanzen, die mittels neuer molekularbiologischer Techniken für die Bereiche Ernährung, Landwirtschaft und Gartenbau erzeugt wurden – marktorientierte Anwendungen (Version 20.03.2020)

    Modrzejewski, Dominik / Hartung, Frank / Sprink, Thorben / Menz, Jochen / Kohl, Christian / Delventhal, Rhoda / Wilhelm, Ralf

    2020  

    Keywords Text ; ddc:630
    Language German
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: An organ-specific view on non-host resistance.

    Strugala, Roxana / Delventhal, Rhoda / Schaffrath, Ulrich

    Frontiers in plant science

    2015  Volume 6, Page(s) 526

    Abstract: Non-host resistance (NHR) is the resistance of plants to a plethora of non-adapted pathogens and is considered as one of the most robust resistance mechanisms of plants. Studies have shown that the efficiency of resistance in general and NHR in ... ...

    Abstract Non-host resistance (NHR) is the resistance of plants to a plethora of non-adapted pathogens and is considered as one of the most robust resistance mechanisms of plants. Studies have shown that the efficiency of resistance in general and NHR in particular could vary in different plant organs, thus pointing to tissue-specific determinants. This was exemplified by research on host and non-host interactions of the fungal plant pathogen Magnaporthe oryzae with rice and Arabidopsis, respectively. Thus, rice roots were shown to be impaired in resistance to M. oryzae isolates to which leaves of the same rice cultivar are highly resistant. Moreover, roots of Arabidopsis are also accessible to penetration by M. oryzae while leaves of this non-host plant cannot be infected. We addressed the question whether or not other plant tissues such as the reproductive system also differ in NHR compared to leaves. Inoculation experiments on wheat with different Magnaporthe species forming either a host or non-host type of interaction revealed that NHR was as effective on spikes as on leaves. This finding might pave the way for combatting M. oryzae disease on wheat spikes which has become a serious threat especially in South America.
    Language English
    Publishing date 2015-07-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711035-7
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2015.00526
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Abscisic acid negatively interferes with basal defence of barley against Magnaporthe oryzae.

    Ulferts, Sylvia / Delventhal, Rhoda / Splivallo, Richard / Karlovsky, Petr / Schaffrath, Ulrich

    BMC plant biology

    2015  Volume 15, Page(s) 7

    Abstract: Background: Plant hormones are well known regulators which balance plant responses to abiotic and biotic stresses. We investigated the role of abscisic acid (ABA) in resistance of barley (Hordeum vulgare L.) against the plant pathogenic fungus ... ...

    Abstract Background: Plant hormones are well known regulators which balance plant responses to abiotic and biotic stresses. We investigated the role of abscisic acid (ABA) in resistance of barley (Hordeum vulgare L.) against the plant pathogenic fungus Magnaporthe oryzae.
    Results: Exogenous application of ABA prior to inoculation with M. oryzae led to more disease symptoms on barley leaves. This result contrasted the finding that ABA application enhances resistance of barley against the powdery mildew fungus. Microscopic analysis identified diminished penetration resistance as cause for enhanced susceptibility. Consistently, the barley mutant Az34, impaired in ABA biosynthesis, was less susceptible to infection by M. oryzae and displayed elevated penetration resistance as compared to the isogenic wild type cultivar Steptoe. Chemical complementation of Az34 mutant plants by exogenous application of ABA re-established disease severity to the wild type level. The role of ABA in susceptibility of barley against M. oryzae was corroborated by showing that ABA application led to increased disease severity in all barley cultivars under investigation except for the most susceptible cultivar Pallas. Interestingly, endogenous ABA concentrations did not significantly change after infection of barley with M. oryzae.
    Conclusion: Our results revealed that elevated ABA levels led to a higher disease severity on barley leaves to M. oryzae. This supports earlier reports on the role of ABA in enhancing susceptibility of rice to the same pathogen and thereby demonstrates a host plant-independent function of this phytohormone in pathogenicity of monocotyledonous plants against M. oryzae.
    MeSH term(s) Abscisic Acid/pharmacology ; Disease Resistance/drug effects ; Genotype ; Hordeum/drug effects ; Hordeum/genetics ; Hordeum/immunology ; Hordeum/microbiology ; Kinetics ; Magnaporthe/drug effects ; Magnaporthe/physiology ; Mutation/genetics ; Phenotype ; Plant Diseases/immunology ; Plant Diseases/microbiology ; Plant Growth Regulators/pharmacology ; Salicylic Acid/metabolism
    Chemical Substances Plant Growth Regulators ; Abscisic Acid (72S9A8J5GW) ; Salicylic Acid (O414PZ4LPZ)
    Language English
    Publishing date 2015-01-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1471-2229
    ISSN (online) 1471-2229
    DOI 10.1186/s12870-014-0409-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Ectoparasitic growth of Magnaporthe on barley triggers expression of the putative barley wax biosynthesis gene CYP96B22 which is involved in penetration resistance.

    Delventhal, Rhoda / Falter, Christian / Strugala, Roxana / Zellerhoff, Nina / Schaffrath, Ulrich

    BMC plant biology

    2014  Volume 14, Page(s) 26

    Abstract: Background: Head blast caused by the fungal plant pathogen Magnaporthe oryzae is an upcoming threat for wheat and barley cultivation. We investigated the nonhost response of barley to an isolate of the Magnaporthe species complex which is pathogenic on ... ...

    Abstract Background: Head blast caused by the fungal plant pathogen Magnaporthe oryzae is an upcoming threat for wheat and barley cultivation. We investigated the nonhost response of barley to an isolate of the Magnaporthe species complex which is pathogenic on Pennisetum spp. as a potential source for novel resistance traits.
    Results: Array experiments identified a barley gene encoding a putative cytochrome P450 monooxygenase whose transcripts accumulate to a higher concentration in the nonhost as compared to the host interaction. The gene clusters within the CYP96 clade of the P450 plant gene family and is designated as CYP96B22. Expression of CYP96B22 was triggered during the ectoparasitic growth of the pathogen on the outside of the leaf. Usage of a fungicidal treatment and a Magnaporthe mutant confirmed that penetration was not necessary for this early activation of CYP96B22. Transcriptional silencing of CYP96B22 using Barley stripe mosaic virus led to a decrease in penetration resistance of barley plants to Magnaporthe host and nonhost isolates. This phenotype seems to be specific for the barley-Magnaporthe interaction, since penetration of the adapted barley powdery mildew fungus was not altered in similarly treated plants.
    Conclusion: Taken together our results suggest a cross-talk between barley and Magnaporthe isolates across the plant surface. Since members of the plant CYP96 family are known to be involved in synthesis of epicuticular waxes, these substances or their derivatives might act as signal components. We propose a functional overlap of CYP96B22 in the execution of penetration resistance during basal and nonhost resistance of barley against different Magnaporthe species.
    MeSH term(s) Hordeum/metabolism ; Hordeum/microbiology ; Magnaporthe/pathogenicity ; Plant Diseases/microbiology ; Plant Proteins/genetics ; Plant Proteins/metabolism
    Chemical Substances Plant Proteins
    Language English
    Publishing date 2014-01-14
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1471-2229
    ISSN (online) 1471-2229
    DOI 10.1186/1471-2229-14-26
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Book ; Online ; Thesis: Vergleich der Wirt- und Nichtwirt-Interaktion von Gerste mit verschiedenen Magnaporthe-Arten anhand von histologischen Untersuchungen, Transkriptomstudien und funktionalen Genanalysen

    Delventhal, Rhoda [Verfasser] / Schaffrath, Ulrich [Akademischer Betreuer] / Slusarenko, Alan [Akademischer Betreuer]

    2015  

    Author's details Rhoda Delventhal ; Ulrich Schaffrath, Alan Slusarenko
    Keywords Landwirtschaft, Veterinärmedizin ; Agriculture, Veterinary Science
    Subject code sg630
    Language German
    Publisher Universitätsbibliothek der RWTH Aachen
    Publishing place Aachen
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

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  9. Article ; Online: Erratum to: Magnaporthe oryzae effectors MoHEG13 and MoHEG16 interfere with host infection and MoHEG13 counteracts cell death caused by Magnaporthe-NLPs in tobacco.

    Mogga, Valerie / Delventhal, Rhoda / Weidenbach, Denise / Langer, Samantha / Bertram, Philipp M / Andresen, Karsten / Thines, Eckhard / Kroj, Thomas / Schaffrath, Ulrich

    Plant cell reports

    2016  Volume 35, Issue 5, Page(s) 1187

    Language English
    Publishing date 2016-03-25
    Publishing country Germany
    Document type Published Erratum
    ZDB-ID 8397-5
    ISSN 1432-203X ; 0721-085X ; 0721-7714
    ISSN (online) 1432-203X
    ISSN 0721-085X ; 0721-7714
    DOI 10.1007/s00299-016-1968-0
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  10. Article ; Online: Barley stripe mosaic virus-induced gene silencing (BSMV-IGS) as a tool for functional analysis of barley genes potentially involved in nonhost resistance.

    Delventhal, Rhoda / Zellerhoff, Nina / Schaffrath, Ulrich

    Plant signaling & behavior

    2011  Volume 6, Issue 6, Page(s) 867–869

    Abstract: Barley is an alternative host for the rice blast fungus Magnaporthe oryzae but is resistant to Magnaporthe species associated with the grass genera Pennisetum and Digitaria. The latter cases are examples for nonhost resistance which confers effective and ...

    Abstract Barley is an alternative host for the rice blast fungus Magnaporthe oryzae but is resistant to Magnaporthe species associated with the grass genera Pennisetum and Digitaria. The latter cases are examples for nonhost resistance which confers effective and durable protection to plants against a broad spectrum of pathogens. Comparative transcript profiling of host and nonhost interaction revealed an early and pronounced change in gene expression in epidermal tissue of barley infected with a Magnaporthe nonhost isolate. Interestingly, this set of genes did not overlap considerably with the transcriptional response of barley against nonhost rust or powdery mildew isolates. For a functional testing of candidate genes a combined approach of virus-induced gene silencing (VIGS) and subsequent pathogen challenge was established. As anticipated, VIGS-mediated down-regulation of Mlo-transcripts led to higher resistance against Blumeria graminis f.sp. hordei and enhanced susceptibility against M. oryzae.
    MeSH term(s) Disease Resistance/genetics ; Gene Silencing ; Genes, Plant/genetics ; Hordeum/genetics ; Hordeum/immunology ; Hordeum/microbiology ; Mosaic Viruses/physiology ; Plant Diseases/genetics ; Plant Diseases/immunology ; Plant Diseases/microbiology
    Language English
    Publishing date 2011-06-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1559-2324
    ISSN (online) 1559-2324
    DOI 10.4161/psb.6.6.15240
    Database MEDical Literature Analysis and Retrieval System OnLINE

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