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Metabolites
Special Issues
Advances in Plant-Microbe Interactions Using Metabolomics Approaches
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Advances in Plant-Microbe Interactions Using Metabolomics Approaches

A special issue of Metabolites (ISSN 2218-1989). This special issue belongs to the section "Plant Metabolism".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 6778

Special Issue Editor

Dr. Roberta Marra

E-Mail Website
Guest Editor
Department of Agricultural Science, University of Naples Federico II, Portici, NA, Italy
Interests: biological control; metabolomics; beneficial microbes; plant disease control; microbial metabolites; post-harvest disease control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In nature, plants and microbes interact in many different ways, establishing complex relationships not necessarily negative for the plant. The rhizosphere represents the key zone where the molecular crosstalk between plants and beneficial or detrimental microflora may occur. Deciphering how plants respond to a pathogen attack or beneficial microbe colonization, as well as how microorganisms establish symbiotic rather than pathogenic interactions with their hosts is a major challenge for the development of novel plant protection strategies. Metabolomic analysis, together with other omics technologies, may greatly contribute to elucidating which pathways are involved in plant response to biotic and abiotic stimuli. Moreover, the identification of signaling compounds, either secreted by plants or by the microbial counterpart, may have important implications in drug discovery and the development of novel bioformulations to be used in agriculture and chemotaxonomic studies.

The topics covered by this Special Issue will include but are not limited to the following: identification of metabolites involved in plant-microbe (P-M) interactions, possibly in relation to other omics technologies; application of metabolomic methods used to analyze symbiotic rather than pathogenic P-M interactions; targeted and untargeted metabolite profiling data analysis involved in plant resistance to stresses or in pathogen virulence; biomarker discovery for taxonomic studies; metabolite profiling for epidemiological studies. Manuscripts dealing with other pertinent challenging issues are also highly desired.

The Special Issue is open for submission now. A proper extension may be granted. Please kindly let us know in advance if you plan to make a submission. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the Special Issue website.

Dr. Roberta Marra
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metabolites is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Plant–microbe interactions
  • Metabolomics
  • Phytopathogens
  • Plant defense
  • Bioactive compounds
  • Biotic/abiotic stress
  • Volatile organic compounds
  • Rhizosphere

Published Papers (2 papers)

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Research

13 pages, 2496 KiB  
Article
Trichoderma Strains and Metabolites Selectively Increase the Production of Volatile Organic Compounds (VOCs) in Olive Trees
by Irene Dini, Roberta Marra, Pierpaolo Cavallo, Angela Pironti, Immacolata Sepe, Jacopo Troisi, Giovanni Scala, Pasquale Lombari and Francesco Vinale
Metabolites 2021, 11(4), 213; https://doi.org/10.3390/metabo11040213 - 31 Mar 2021
Cited by 22 | Viewed by 3255
Abstract
Plants emit volatile organic compounds (VOCs) that induce metabolomic, transcriptomic, and behavioral reactions in receiver organisms, including insect pollinators and herbivores. VOCs’ composition and concentration may influence plant-insect or plant-plant interactions and affect soil microbes that may interfere in plant-plant communication. Many Trichoderma [...] Read more.
Plants emit volatile organic compounds (VOCs) that induce metabolomic, transcriptomic, and behavioral reactions in receiver organisms, including insect pollinators and herbivores. VOCs’ composition and concentration may influence plant-insect or plant-plant interactions and affect soil microbes that may interfere in plant-plant communication. Many Trichoderma fungi act as biocontrol agents of phytopathogens and plant growth promoters. Moreover, they can stimulate plant defense mechanisms against insect pests. This study evaluated VOCs’ emission by olive trees (Olea europaea L.) when selected Trichoderma fungi or metabolites were used as soil treatments. Trichoderma harzianum strains M10, T22, and TH1, T. asperellum strain KV906, T. virens strain GV41, and their secondary metabolites harzianic acid (HA), and 6-pentyl-α-pyrone (6PP) were applied to olive trees. Charcoal cartridges were employed to adsorb olive VOCs, and gas chromatography mass spectrometry (GC-MS) analysis allowed their identification and quantification. A total of 45 volatile compounds were detected, and among these, twenty-five represented environmental pollutants and nineteen compounds were related to olive plant emission. Trichoderma strains and metabolites differentially enhanced VOCs production, affecting three biosynthetic pathways: methylerythritol 1-phosphate (MEP), lipid-signaling, and shikimate pathways. Multivariate analysis models showed a characteristic fingerprint of each plant-fungus/metabolite relationship, reflecting a different emission of VOCs by the treated plants. Specifically, strain M10 and the metabolites 6PP and HA enhanced the monoterpene syntheses by controlling the MEP pathway. Strains GV41, KV906, and the metabolite HA stimulated the hydrocarbon aldehyde formation (nonanal) by regulating the lipid-signaling pathway. Finally, Trichoderma strains GV41, M10, T22, TH1, and the metabolites HA and 6PP improve aromatic syntheses at different steps of the shikimate pathway. Full article
(This article belongs to the Special Issue Advances in Plant-Microbe Interactions Using Metabolomics Approaches)
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21 pages, 3381 KiB  
Article
A Cross-Metabolomic Approach Shows that Wheat Interferes with Fluorescent Pseudomonas Physiology through Its Root Metabolites
by Laura Rieusset, Marjolaine Rey, Florence Gerin, Florence Wisniewski-Dyé, Claire Prigent-Combaret and Gilles Comte
Metabolites 2021, 11(2), 84; https://doi.org/10.3390/metabo11020084 - 31 Jan 2021
Cited by 7 | Viewed by 2780
Abstract
Roots contain a wide variety of secondary metabolites. Some of them are exudated in the rhizosphere, where they are able to attract and/or control a large diversity of microbial species. In return, the rhizomicrobiota can promote plant health and development. Some rhizobacteria belonging [...] Read more.
Roots contain a wide variety of secondary metabolites. Some of them are exudated in the rhizosphere, where they are able to attract and/or control a large diversity of microbial species. In return, the rhizomicrobiota can promote plant health and development. Some rhizobacteria belonging to the Pseudomonas genus are known to produce a wide diversity of secondary metabolites that can exert a biological activity on the host plant and on other soil microorganisms. Nevertheless, the impact of the host plant on the production of bioactive metabolites by Pseudomonas is still poorly understood. To characterize the impact of plants on the secondary metabolism of Pseudomonas, a cross-metabolomic approach has been developed. Five different fluorescent Pseudomonas strains were thus cultivated in the presence of a low concentration of wheat root extracts recovered from three wheat genotypes. Analysis of our metabolomic workflow revealed that the production of several Pseudomonas secondary metabolites was significantly modulated when bacteria were cultivated with root extracts, including metabolites involved in plant-beneficial properties. Full article
(This article belongs to the Special Issue Advances in Plant-Microbe Interactions Using Metabolomics Approaches)
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