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Plants
Special Issues
Volatile Organic Compounds on Plant Communication and Defense
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Volatile Organic Compounds on Plant Communication and Defense

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Phytochemistry".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 4831

Special Issue Editor

Dr. Andrea Ghirardo

E-Mail Website
Guest Editor
Research Unit Environmental Simulation (EUS), Institute of Biochemical Plant Pathology (BIOP), Ingolstädter Landstr. 1, 85764 Neuherberg, Germany
Interests: volatile organic compound; insect–, microbe–, and plant–plant interactions; plant resistance and acclimation to abiotic and biotic stresses; metabolomics; carbon fluxes; bioenergy; climate change and climate simulations

Special Issue Information

Dear Colleagues,

Plant volatiles are a group of multifunctional secondary metabolites. Volatiles help plants to cope with various abiotic stresses, such as heat, light and ozone, or several biotic stressors, such as pathogen and herbivorous attacks. They compose the plant language for the complex interactions with the environment and act as cues and signals in plant–microbe, plant–animal, and plant–plant communications, playing essential roles in chemical ecology. Perception of volatiles—their presence or absence—can enhance plant defense and resistance through a complex modulation of phytohormones. Alteration in exposures to volatile triggers plant defense responses that must be precisely regulated to optimize benefits over costs in investing resources. Volatile production can further modulate plant developmental processes by finetuning the cellular regulation or adjusting plant physiological processes. We have started to unravel the complexity of the multifaceted roles of volatiles in plant physiology and their interplay in cellular processes. This Special Issue of Plants will highlight the fascinating new functions, mechanisms, and diversity of plant volatile emissions and their role in triggering and regulating plant defense and development or functioning in mediating complex interactions between species and with higher trophic levels.

Dr. Andrea Ghirardo
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. Plants is an international peer-reviewed open access semimonthly 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 volatiles
  • VOC
  • plant communication
  • allocation
  • defense
  • abiotic stress
  • biotic stress
  • phytohormones

Published Papers (2 papers)

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Research

12 pages, 22686 KiB  
Communication
Silencing Phytoene Desaturase Causes Alteration in Monoterpene Volatiles Belonging to the Methylerythritol Phosphate Pathway
by Nabil Killiny
Plants 2022, 11(3), 276; https://doi.org/10.3390/plants11030276 - 20 Jan 2022
Cited by 1 | Viewed by 2063
Abstract
Volatile organic compounds (VOCs) are a large group of lipophilic hydrocarbon compounds derived from different biosynthetic pathways in plants. VOCs are produced and released from plants as a defense mechanism against biotic and abiotic stresses. They are involved in communication with the surrounding [...] Read more.
Volatile organic compounds (VOCs) are a large group of lipophilic hydrocarbon compounds derived from different biosynthetic pathways in plants. VOCs are produced and released from plants as a defense mechanism against biotic and abiotic stresses. They are involved in communication with the surrounding environment including plant-to-plant interactions and attracting or repelling insects. In citrus, phytoene desaturase (PDS), a precursor of the carotenoid biosynthetic pathway has been silenced using the Citrus tristeza virus-induced gene silencing technique. Silencing PDS resulted in a reduction of carotenoid contents and in the photobleaching phenotype in leaves. Interestingly, the strength of the phenotype was varied within the plants due to the unequal distribution of virus particles. Using solid-phase microextraction (SPME), fibers released VOCs from leaves with gradient degrees of the photobleaching phenotype were collected and analyzed in gas chromatography-mass spectrophotometry (GC-MS). Overall, 47 VOCs belonging to 12 chemically distinguished groups were detected and identified using authentic standards. Simple linear regression showed that monoterpenes belonging to methylerythritol phosphate (MEP) were significantly corrected with the degrees of photobleaching (carotenoid content). Both carotenoids and MEP biosynthetic pathways occurred in the plastid. Thus, we provide preliminary evidence for a potential role of carotenoids in supporting the MEP pathway and/or the production of monoterpenes. Full article
(This article belongs to the Special Issue Volatile Organic Compounds on Plant Communication and Defense)
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20 pages, 1873 KiB  
Article
Influence of Rootstock on the Leaf Volatile Organic Compounds of Citrus Scion Is More Pronounced after the Infestation with Diaphorina citri
by Shelley E. Jones and Nabil Killiny
Plants 2021, 10(11), 2422; https://doi.org/10.3390/plants10112422 - 10 Nov 2021
Cited by 5 | Viewed by 2012
Abstract
Nowadays, citrus greening or Huanglongbing is considered the most destructive disease in the citrus industry worldwide. In the Americas and Asia, the disease is caused by the putative pathogen, ‘Candidatus Liberibacter asiaticus’ and transmitted by the psyllid vector, Diaphorina citri. It [...] Read more.
Nowadays, citrus greening or Huanglongbing is considered the most destructive disease in the citrus industry worldwide. In the Americas and Asia, the disease is caused by the putative pathogen, ‘Candidatus Liberibacter asiaticus’ and transmitted by the psyllid vector, Diaphorina citri. It has been shown that volatile organic compounds (VOC) that are released from citrus leaves attract the psyllid vector. Herein, we tested whether the rootstock influenced the stored VOC profile in the scion leaves and if these influences were altered after infestation with D. citri. The VOC profiles of the hexane-extracted leaves of the mandarin hybrid ‘Sugar Belle’ that were grafted on three different rootstocks (C-35, sour orange (SO), and US-897) with and without infestation with D. citri were studied. The GC-MS analysis showed that the scion VOC profiles of the non-infested control trees were similar to each other, and rootstock was not a strong influence. However, after one month of infestation with D. citri, clear differences in the scion VOC profiles appeared that were rootstock dependent. Although the total scion leaf VOC content did not differ between the three rootstocks, the infestation increased scion monoterpenes significantly on US-897 and C-35 rootstock, increased terpene alcohols on US-897 and SO rootstock, and increased sesquiterpenes on SO. Infestation with D. citri significantly reduced fatty acids and fatty acid esters across all of the rootstocks. Therefore, our results suggest that rootstock choice could influence scions with an inducible volatile defense by enhancing the amounts of VOCs that are available for repelling vectors or for signaling to their natural enemies or parasitoids. According to this study, US-897 may be the best choice among the three that were studied herein, due to its diverse and robust VOC defense response to infestation with D. citri. Full article
(This article belongs to the Special Issue Volatile Organic Compounds on Plant Communication and Defense)
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