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  1. Article: Genetic and physiological requirements for high-level sesquiterpene-production in tomato glandular trichomes.

    Kortbeek, Ruy W J / Galland, Marc D / Muras, Aleksandra / Therezan, Rodrigo / Maia, Sofia / Haring, Michel A / Schuurink, Robert C / Bleeker, Petra M

    Frontiers in plant science

    2023  Volume 14, Page(s) 1139274

    Abstract: Type-VI glandular trichomes of wild ... ...

    Abstract Type-VI glandular trichomes of wild tomato
    Language English
    Publishing date 2023-03-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2023.1139274
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Natural variation in wild tomato trichomes; selecting metabolites that contribute to insect resistance using a random forest approach

    Kortbeek, Ruy W. J. / Galland, Marc D. / Muras, Aleksandra / van der Kloet, Frans M. / André, Bart / Heilijgers, Maurice / van Hijum, Sacha A. F. T. / Haring, Michel A. / Schuurink, Robert C. / Bleeker, Petra M.

    BMC Plant Biol. 2021 Dec., v. 21, no. 1 p.315-315

    2021  

    Abstract: BACKGROUND: Plant-produced specialised metabolites are a powerful part of a plant’s first line of defence against herbivorous insects, bacteria and fungi. Wild ancestors of present-day cultivated tomato produce a plethora of acylsugars in their type-I/IV ...

    Abstract BACKGROUND: Plant-produced specialised metabolites are a powerful part of a plant’s first line of defence against herbivorous insects, bacteria and fungi. Wild ancestors of present-day cultivated tomato produce a plethora of acylsugars in their type-I/IV trichomes and volatiles in their type-VI trichomes that have a potential role in plant resistance against insects. However, metabolic profiles are often complex mixtures making identification of the functionally interesting metabolites challenging. Here, we aimed to identify specialised metabolites from a wide range of wild tomato genotypes that could explain resistance to vector insects whitefly (Bemisia tabaci) and Western flower thrips (Frankliniella occidentalis). We evaluated plant resistance, determined trichome density and obtained metabolite profiles of the glandular trichomes by LC-MS (acylsugars) and GC-MS (volatiles). Using a customised Random Forest learning algorithm, we determined the contribution of specific specialised metabolites to the resistance phenotypes observed. RESULTS: The selected wild tomato accessions showed different levels of resistance to both whiteflies and thrips. Accessions resistant to one insect can be susceptible to another. Glandular trichome density is not necessarily a good predictor for plant resistance although the density of type-I/IV trichomes, related to the production of acylsugars, appears to correlate with whitefly resistance. For type VI-trichomes, however, it seems resistance is determined by the specific content of the glands. There is a strong qualitative and quantitative variation in the metabolite profiles between different accessions, even when they are from the same species. Out of 76 acylsugars found, the random forest algorithm linked two acylsugars (S3:15 and S3:21) to whitefly resistance, but none to thrips resistance. Out of 86 volatiles detected, the sesquiterpene α-humulene was linked to whitefly susceptible accessions instead. The algorithm did not link any specific metabolite to resistance against thrips, but monoterpenes α-phellandrene, α-terpinene and β-phellandrene/D-limonene were significantly associated with susceptible tomato accessions. CONCLUSIONS: Whiteflies and thrips are distinctly targeted by certain specialised metabolites found in wild tomatoes. The machine learning approach presented helped to identify features with efficacy toward the insect species studied. These acylsugar metabolites can be targets for breeding efforts towards the selection of insect-resistant cultivars.
    Keywords Bemisia tabaci ; Frankliniella occidentalis ; algorithms ; cultivars ; herbivores ; insect resistance ; insects ; metabolites ; monoterpenoids ; sesquiterpenoids ; tomatoes ; trichomes
    Language English
    Dates of publication 2021-12
    Size p. 315.
    Publishing place BioMed Central
    Document type Article ; Online
    ZDB-ID 2059868-3
    ISSN 1471-2229
    ISSN 1471-2229
    DOI 10.1186/s12870-021-03070-x
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Natural variation in wild tomato trichomes; selecting metabolites that contribute to insect resistance using a random forest approach.

    Kortbeek, Ruy W J / Galland, Marc D / Muras, Aleksandra / van der Kloet, Frans M / André, Bart / Heilijgers, Maurice / van Hijum, Sacha A F T / Haring, Michel A / Schuurink, Robert C / Bleeker, Petra M

    BMC plant biology

    2021  Volume 21, Issue 1, Page(s) 315

    Abstract: Background: Plant-produced specialised metabolites are a powerful part of a plant's first line of defence against herbivorous insects, bacteria and fungi. Wild ancestors of present-day cultivated tomato produce a plethora of acylsugars in their type-I/ ... ...

    Abstract Background: Plant-produced specialised metabolites are a powerful part of a plant's first line of defence against herbivorous insects, bacteria and fungi. Wild ancestors of present-day cultivated tomato produce a plethora of acylsugars in their type-I/IV trichomes and volatiles in their type-VI trichomes that have a potential role in plant resistance against insects. However, metabolic profiles are often complex mixtures making identification of the functionally interesting metabolites challenging. Here, we aimed to identify specialised metabolites from a wide range of wild tomato genotypes that could explain resistance to vector insects whitefly (Bemisia tabaci) and Western flower thrips (Frankliniella occidentalis). We evaluated plant resistance, determined trichome density and obtained metabolite profiles of the glandular trichomes by LC-MS (acylsugars) and GC-MS (volatiles). Using a customised Random Forest learning algorithm, we determined the contribution of specific specialised metabolites to the resistance phenotypes observed.
    Results: The selected wild tomato accessions showed different levels of resistance to both whiteflies and thrips. Accessions resistant to one insect can be susceptible to another. Glandular trichome density is not necessarily a good predictor for plant resistance although the density of type-I/IV trichomes, related to the production of acylsugars, appears to correlate with whitefly resistance. For type VI-trichomes, however, it seems resistance is determined by the specific content of the glands. There is a strong qualitative and quantitative variation in the metabolite profiles between different accessions, even when they are from the same species. Out of 76 acylsugars found, the random forest algorithm linked two acylsugars (S3:15 and S3:21) to whitefly resistance, but none to thrips resistance. Out of 86 volatiles detected, the sesquiterpene α-humulene was linked to whitefly susceptible accessions instead. The algorithm did not link any specific metabolite to resistance against thrips, but monoterpenes α-phellandrene, α-terpinene and β-phellandrene/D-limonene were significantly associated with susceptible tomato accessions.
    Conclusions: Whiteflies and thrips are distinctly targeted by certain specialised metabolites found in wild tomatoes. The machine learning approach presented helped to identify features with efficacy toward the insect species studied. These acylsugar metabolites can be targets for breeding efforts towards the selection of insect-resistant cultivars.
    MeSH term(s) Algorithms ; Animals ; Disease Resistance/genetics ; Ecotype ; Genetic Variation ; Genotype ; Hemiptera/physiology ; Metabolome/genetics ; Phenotype ; Solanum/genetics ; Thysanoptera/physiology ; Trichomes/genetics ; Trichomes/metabolism ; Volatile Organic Compounds/analysis
    Chemical Substances Volatile Organic Compounds
    Language English
    Publishing date 2021-07-02
    Publishing country England
    Document type Journal Article
    ISSN 1471-2229
    ISSN (online) 1471-2229
    DOI 10.1186/s12870-021-03070-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: ZNF91

    Haring, Nina L / van Bree, Elisabeth J / Jordaan, Whitney S / Roels, Judith R E / Sotomayor, Gonzalo Congrains / Hey, Tiziana M / White, Fred T G / Galland, Marc D / Smidt, Marten P / Jacobs, Frank M J

    Genome research

    2021  Volume 31, Issue 4, Page(s) 551–563

    Abstract: Transposable element (TE) invasions have shaped vertebrate genomes over the course of evolution. They have contributed an extra layer of species-specific gene regulation by providing novel transcription factor binding sites. In humans, SINE-VNTR- ...

    Abstract Transposable element (TE) invasions have shaped vertebrate genomes over the course of evolution. They have contributed an extra layer of species-specific gene regulation by providing novel transcription factor binding sites. In humans, SINE-VNTR-
    MeSH term(s) Genome, Human ; Human Embryonic Stem Cells ; Humans ; Kruppel-Like Transcription Factors/deficiency ; Multigene Family/genetics ; Repressor Proteins/genetics ; Retroelements/genetics ; Transcriptional Activation ; Up-Regulation ; Zinc Fingers/genetics
    Chemical Substances Kruppel-Like Transcription Factors ; Repressor Proteins ; Retroelements ; ZNF350 protein, human ; ZNF91 protein, human
    Language English
    Publishing date 2021-03-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1284872-4
    ISSN 1549-5469 ; 1088-9051 ; 1054-9803
    ISSN (online) 1549-5469
    ISSN 1088-9051 ; 1054-9803
    DOI 10.1101/gr.265348.120
    Database MEDical Literature Analysis and Retrieval System OnLINE

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