Journal
MOLECULES
Volume 26, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/molecules26010237
Keywords
aboveground-belowground interactions; biomarkers; chemodiversity; isoprene; monoterpene; salicylate; sesquiterpene; Solanum lycopersicum; volatile organic compound emission
Funding
- project ODORSCAPE of the French National Research Agency [ANR15-CE02-010-01]
- LabEx CeMEB [ANR-10-LABX-04-01]
- Algerian Ministry of Higher Education and Scientific Research
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The study showed that there is high genetic variability in the constitutive volatile organic compound emissions from tomato plants under stress-free conditions, with significant differences in emission composition and quantity among genotypes. Foliage emissions were found to be low and partly light-dependent, while soil emissions were characterized by terpenes, oxygenated alkanes, and alkenes and phenolic compounds. The correlation analyses indicated that certain VOCs emitted from foliage or soil are jointly regulated, suggesting interconnected sources above and belowground.
The in-vivo monitoring of volatile organic compound (VOC) emissions is a potential non-invasive tool in plant protection, especially in greenhouse cultivation. We studied VOC production from above and belowground organs of the eight parents of the Multi-Parent Advanced Generation Intercross population (MAGIC) tomato population, which exhibits a high genetic variability, in order to obtain more insight into the variability of constitutive VOC emissions from tomato plants under stress-free conditions. Foliage emissions were composed of terpenes, the majority of which were also stored in the leaves. Foliage emissions were very low, partly light-dependent, and differed significantly among genotypes, both in quantity and quality. Soil with roots emitted VOCs at similar, though more variable, rates than foliage. Soil emissions were characterized by terpenes, oxygenated alkanes, and alkenes and phenolic compounds, only a few of which were found in root extracts at low concentrations. Correlation analyses revealed that several VOCs emitted from foliage or soil are jointly regulated and that above and belowground sources are partially interconnected. With respect to VOC monitoring in tomato crops, our results underline that genetic variability, light-dependent de-novo synthesis, and belowground sources are factors to be considered for successful use in crop monitoring.
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