S-methyl Methanethiosulfonate: Promising Late Blight Inhibitor or Broad Range Toxin?

Joller, Charlotte and De Vrieze, Mout and Moradi, Aboubakr and Fournier, Claudine and Chinchilla, Delphine and L'Haridon, Floriane and Bruisson, Sebastien and Weisskopf, Laure. (2020) S-methyl Methanethiosulfonate: Promising Late Blight Inhibitor or Broad Range Toxin? Pathogens, 9 (6). p. 496.

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Official URL: https://edoc.unibas.ch/82559/

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(1) Background: S-methyl methanethiosulfonate (MMTS), a sulfur containing volatile organic compound produced by plants and bacterial species, has recently been described to be an efficient anti-oomycete agent with promising perspectives for the control of the devastating potato late blight disease caused by Phytophthora infestans. However, earlier work raised questions regarding the putative toxicity of this compound. To assess the suitability of MMTS for late blight control in the field, the present study thus aimed at evaluating the effect of MMTS on a wide range of non-target organisms in comparison to P. infestans . (2) Methods: To this end, we exposed P. infestans, as well as different pathogenic and non-pathogenic fungi, bacteria, the nematode Caenorhabditis elegans as well as the plant Arabidopsis thaliana to MMTS treatment and evaluated their response by means of in vitro assays. (3) Results: Our results showed that fungi (both mycelium and spores) tolerated MMTS better than the oomycete P. infestans, but that the compound nevertheless exhibited non-negligible toxic effects on bacteria, nematodes and plants. (4) Conclusions: We discuss the mode of action of MMTS and conclude that even though this compound might be too toxic for chemical application in the field, its strong anti-oomycete activity could still be exploited when naturally released at the site of infection by plant-associated microbes inoculated as biocontrol agents.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Plant-Microbe Interaction (Schl├Ąppi)
UniBasel Contributors:Chinchilla, Delphine
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Apr 2021 09:28
Deposited On:12 Apr 2021 09:28

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