Soldier defensive secretion of three Amitermes species

Braekman, Jean Claude; Remacle, Adrienne; Roisin, Yves

doi:10.1016/0305-1978(93)90070-8

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…While 1 is produced by some basidiomycete and ascomycete fungi and by some actinomycetes, no biological activity has been described for either fungi or bacteria (Rösecke et al, 2000;Ayoub et al, 2009, Brock andRabe et al, 2013, Yuan et al, 2013. Furthermore, 1 is produced (along with other sesquiterpenes) by soldier termites from different species and Ceroplastes ceriferu, a scale insect (Naya et al, 1978;Braekman et al, 1993, Krasulova et al, 2012. Similarly, many plants and insects such as termites, aphids, butterflies and lady beetles, produce β-elemene (2) (Bowers et al, 1977;Baker et al, 1981, Everaerts et al, 1993Quintana et al, 2003, Omura et al, 2006Adio, 2009, Fassotte et al, 2014.…”

Section: Discussionmentioning

confidence: 99%

Volatile Molecules Secreted by the Wheat Pathogen Parastagonospora nodorum Are Involved in Development and Phytotoxicity

et al. 2020

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Septoria nodorum blotch is a major disease of wheat caused by the fungus Parastagonospora nodorum. Recent studies have demonstrated that secondary metabolites, including polyketides and non-ribosomal peptides, produced by the pathogen play important roles in disease and development. However, there is currently no knowledge on the composition or biological activity of the volatile organic compounds (VOCs) secreted by P. nodorum. To address this, we undertook a series of growth and phytotoxicity assays and demonstrated that P. nodorum VOCs inhibited bacterial growth, were phytotoxic and suppressed self-growth. Mass spectrometry analysis revealed that 3-methyl-1-butanol, 2-methyl-1-butanol, 2-methyl-1-propanol, and 2phenylethanol were dominant in the VOC mixture and phenotypic assays using these short chain alcohols confirmed that they were phytotoxic. Further analysis of the VOCs also identified the presence of multiple sesquiterpenes of which four were identified via mass spectrometry and nuclear magnetic resonance as β-elemene, α-cyperone, eudesma-4,11-diene and acora-4,9-diene. Subsequent reverse genetics studies were able to link these molecules to corresponding sesquiterpene synthases in the P. nodorum genome. However, despite extensive testing, these molecules were not involved in either of the growth inhibition or phytotoxicity phenotypes previously observed. Plant assays using mutants of the pathogen lacking the synthetic genes revealed that the identified sesquiterpenes were not required for disease formation on wheat leaves. Collectively, these data have significantly extended our knowledge of the VOCs in fungi and provided the basis for further dissecting the roles of sesquiterpenes in plant disease.

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Section: Discussionmentioning

confidence: 99%

Volatile Molecules Secreted by the Wheat Pathogen Parastagonospora nodorum Are Involved in Development and Phytotoxicity

et al. 2020

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“…While 1 is produced by some basidiomycete and ascomycete fungi and by some actinomycetes, no biological activity has been described for either fungi or bacteria 44–48 . Furthermore, 1 is produced (along with other sesquiterpenes) by soldier termites from different species and Ceroplastes ceriferu , a scale insect 49–51 . Similarly, many plants and insects such as termites, aphids, butterflies and lady beetles, produce β-elemene ( 2 ) 52–58 .…”

Section: Discussionmentioning

confidence: 99%

Volatile molecules secreted by the wheat pathogenParastagonospora nodorumare involved in development and phytotoxicity

Gonzalez

Yap

Breen

et al. 2019

Preprint

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AbstractSeptoria nodorum blotch is a major disease of wheat caused by the fungus Parastagonospora nodorum. Recent studies have demonstrated that secondary metabolites, including polyketides and non-ribosomal peptides, produced by the pathogen play important roles in disease and development. However, there is currently no knowledge on the composition or biological activity of the volatile organic compounds (VOCs) secreted by P. nodorum. To address this, we undertook a series of growth and phytotoxicity assays and demonstrated that P. nodorum VOCs inhibited bacterial growth, were phytotoxic and suppressed self-growth. Mass spectrometry analysis revealed that 3-methyl-1-butanol, 2-methyl-1-butanol, 2-methyl-1-propanol and 2-phenylethanol were dominant in the VOC mixture and phenotypic assays using these short chain alcohols confirmed that they were phytotoxic. Further analysis of the VOCs also identified the presence of multiple sesquiterpenes of which four were identified via mass spectrometry and nuclear magnetic resonance as β-elemene, α-cyperone, eudesma-4,11-diene and acora-4,9-diene. Subsequent reverse genetics studies were able to link these molecules to corresponding sesquiterpene synthases in the P. nodorum genome. However, despite extensive testing, these molecules were not involved in either of the growth inhibition or phytotoxicity phenotypes previously observed. Plant assays using mutants of the pathogen lacking the synthetic genes revealed that the identified sesquiterpenes were not required for disease formation on wheat leaves. Collectively, these data have significantly extended our knowledge of the VOCs in fungi and provided the basis for further dissecting the roles of sesquiterpenes in plant disease.

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Chemistry of the Secondary Metabolites of Termites

Gössinger

2019

Progress in the Chemistry of Organic Natural Products 109

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Soldier defensive secretion of three Amitermes species

Cited by 5 publications

References 14 publications

Volatile Molecules Secreted by the Wheat Pathogen Parastagonospora nodorum Are Involved in Development and Phytotoxicity

Volatile Molecules Secreted by the Wheat Pathogen Parastagonospora nodorum Are Involved in Development and Phytotoxicity

Volatile molecules secreted by the wheat pathogenParastagonospora nodorumare involved in development and phytotoxicity

Chemistry of the Secondary Metabolites of Termites

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