Plant Volatile Emissions: From Constitutive to Stress-Induced

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 1985

Special Issue Editor


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Guest Editor
PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, 2610 Antwerpen, Belgium
Interests: volatile organic compound emission; proton-transfer-reaction mass spectrometry (PTR-MS); proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS); plant abiotic stress; plant biotic stress; gas-exchange chamber; photosynthesis
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Special Issue Information

Dear Colleagues,

Plants grown in natural conditions emit VOCs as a product of constitutive reactions. At the same time, many of the stressors that plants are subjected to trigger defensive mechanisms that eventually culminate in the emission of VOCs. In addition, oxygenated VOCs are typically emitted by already-damaged tissues. Therefore, the composition of the VOC blend emitted can be informative of the actual constitutive/defensive/senescing processes that a plant is experiencing. However, information is lacking on (1) the description of the original VOC blends of each physiological status and on (2) the breakpoints that trigger stress-induced VOC emissions. Understanding the effect of degree levels of stress and their correlation to VOC emissions would be very useful in predicting the tropospheric VOC concentrations under an ongoing climate change situation.

This Special Issue of Plants will highlight experimental articles that identify VOC emission blends from leaves and other plant organs with the plant's stress level (single and combined stressors). Research incorporating the use of increments in stress levels to find breakpoints, the use of high-end techniques monitoring temporal dynamics of emission (e.g., PTR-TOF-MS), and additional measurements such as chlorophyll content, photosynthesis, respiration, etc., is encouraged.

Dr. Miguel Portillo-Estrada
Guest Editor

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Keywords

  • volatile organic compounds
  • abiotic stress
  • biotic stress
  • breakpoint
  • PTR-MS
  • GC-MS
  • SPME

Published Papers (1 paper)

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Research

21 pages, 1821 KiB  
Article
Variation in Leaf Volatile Emissions in Potato (Solanum tuberosum) Cultivars with Different Late Blight Resistance
by C. A. Agho, E. Runno-Paurson, T. Tähtjärv, E. Kaurilind and Ü. Niinemets
Plants 2023, 12(11), 2100; https://doi.org/10.3390/plants12112100 - 25 May 2023
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Abstract
Volatile organic compounds (VOCs) play key roles in plant abiotic and biotic stress resistance, but even for widespread crops, there is limited information on variations in the magnitude and composition of constitutive VOC emissions among cultivars with varying stress resistance. The foliage VOC [...] Read more.
Volatile organic compounds (VOCs) play key roles in plant abiotic and biotic stress resistance, but even for widespread crops, there is limited information on variations in the magnitude and composition of constitutive VOC emissions among cultivars with varying stress resistance. The foliage VOC emissions from nine local and commercial potato cultivars (Alouette, Sarme, Kuras, Ando, Anti, Jõgeva Kollane, Teele, 1681-11, and Reet) with medium to late maturities and varying Phytophthora infestans (the causative agent of late blight disease) resistance backgrounds were analyzed to gain an insight into the genetic diversity of constitutive VOC emissions and to test the hypothesis that cultivars more resistant to Phytophthora infestans have greater VOC emissions and different VOC fingerprints. Forty-six VOCs were identified in the emission blends of potato leaves. The majority of the VOCs were sesquiterpenes (50% of the total number of compounds and 0.5–36.9% of the total emissions) and monoterpenes (30.4% of the total number of compounds and 57.8–92.5% of the total VOC emissions). Qualitative differences in leaf volatiles, mainly in sesquiterpenes, were related to the potato genotype background. Among the volatile groups, the monoterpenes α-pinene, β-pinene, Δ3-carene, limonene, and p-cymene, the sesquiterpenes (E)-β-caryophyllene and α-copaene, and green leaf volatile hexanal were the major volatiles in all cultivars. A higher share of VOCs known to have antimicrobial activities was observed. Interestingly, the cultivars were grouped into high and low resistance categories based on the VOC profiles, and the total terpenoid and total constitutive VOC emission scale positively with resistance. To support and expedite advances in breeding for resistance to diseases such as late blight disease, the plant research community must develop a fast and precise approach to measure disease resistance. We conclude that the blend of emitted volatiles is a fast, non-invasive, and promising indicator to identify cultivars resistant to potato late blight disease. Full article
(This article belongs to the Special Issue Plant Volatile Emissions: From Constitutive to Stress-Induced)
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