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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.
Nafissa Dehimeche; Bruno Buatois; Nadia Bertin; Michael Staudt. Insights into the Intraspecific Variability of the above and Belowground Emissions of Volatile Organic Compounds in Tomato. Molecules 2021, 26, 237 .
AMA StyleNafissa Dehimeche, Bruno Buatois, Nadia Bertin, Michael Staudt. Insights into the Intraspecific Variability of the above and Belowground Emissions of Volatile Organic Compounds in Tomato. Molecules. 2021; 26 (1):237.
Chicago/Turabian StyleNafissa Dehimeche; Bruno Buatois; Nadia Bertin; Michael Staudt. 2021. "Insights into the Intraspecific Variability of the above and Belowground Emissions of Volatile Organic Compounds in Tomato." Molecules 26, no. 1: 237.
To examine the physiological role of hexose transporters in determining the sink strength of individual fruits, the regulation of hexose transporters gene expression was studied when the sink/source ratio was artificially altered under the greenhouse condition; this was done in two cultivars of tomato, i.e., ‘Grandella’ and ‘Isabella’. The sink/source ratio treatments included: saving one fruit per truss (1F), two fruits per truss (2F), three fruits per truss (3F), and no fruit pruning (control). The results showed that fruit thinning could increase starch, sucrose and hexose contents in the fruits; it could also modulate the activity of the key enzymes and the expression of tomato hexose transporter genes (LeHTs). Based on the relative transcript levels, all examined LeHTs were unregulated at the end of cell division and the cell expansion stage of fruit development, but the strongest expression level observed at the onset of ripening was related to LeHT1 and LeHT2. Given the concomitancy of cell wall invertase (EC 3.2.1.26) activity and the LeHTs relative expression cell wall, invertase activity seemed to be involved in the expression level of LeHTs. The increased trends of the LeHTs expression with the decrease of the sink/source ratio confirmed the role of hexose transporters in determining the sink strength of the tomato fruits. This article is protected by copyright. All rights reserved.
Leila Aslani; Mahdiyeh Gholami; Mostafa Mobli; Parviz Ehsanzadeh; Nadia Bertin. Decreased sink/source ratio enhances hexose transport in the fruits of greenhouse tomatoes: integration of gene expression and biochemical analyses. Physiologia Plantarum 2020, 170, 1 .
AMA StyleLeila Aslani, Mahdiyeh Gholami, Mostafa Mobli, Parviz Ehsanzadeh, Nadia Bertin. Decreased sink/source ratio enhances hexose transport in the fruits of greenhouse tomatoes: integration of gene expression and biochemical analyses. Physiologia Plantarum. 2020; 170 (1):1.
Chicago/Turabian StyleLeila Aslani; Mahdiyeh Gholami; Mostafa Mobli; Parviz Ehsanzadeh; Nadia Bertin. 2020. "Decreased sink/source ratio enhances hexose transport in the fruits of greenhouse tomatoes: integration of gene expression and biochemical analyses." Physiologia Plantarum 170, no. 1: 1.