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[学术文献 ] Emissions of Biogenic Volatile Organic Compounds from Plants: Impacts of Air Pollutants and Environmental Variables 进入全文
Current Pollution Reports 期刊
This review highlights that O3 generally stimulates BVOC emissions, with a relatively smaller effect on isoprene but notable sensitivity in sesquiterpenes. In contrast, elevated CO2 levels can suppress emissions across the three BVOC types investigated. Warming significantly boosts emissions, while drought has little effect on isoprene but substantially enhances sesquiterpene emissions. These analyses are limited by substantial uncertainties due to data scarcity. Additionally, the combined effects of air pollutants and environmental variables vary by plant species, VOC types, and stressor intensities. This review also summarizes current methodologies for investigating BVOC emissions, explores plant-pollutant-stressor interactions, identifies research gaps, and offers insights for advancing the understanding of stress-induced BVOC emissions in a changing environment and climate.
[学术文献 ] Exploring volatile patterns in tea plants under varying intensities of tea aphid infestation using multivariate analysis 进入全文
Plant Growth Regulation 期刊
The tea aphid Toxoptera aurantii Boyer, is a devastating pest to the tea plant (Camellia sinensis). Tea plants can emit a broad spectrum of volatile organic compounds (VOCs), and patterns of volatile emission are significantly influenced by the type of herbivory. In current work, we examined how the overall profile of volatiles changes in response to varying levels of tea aphid infestation by multivariate and network analysis. Notable changes in multivariate volatile profiles were found upon tea aphid infestation. Multiple dimension reduction methods demonstrated that volatile emissions from tea plants underwent systemic changes in response to varying densities of tea aphid feeding. As infestation intensified, the Shannon entropy and the uniformity of volatile abundances were intricately adjusted, providing key insights into how the tea plant dynamically modulates the response against herbivore attack. The complexity of volatile network was obviously increased, accompanied by decreased modularity and enhanced positive associations. Our current work interprets volatile emission as an integrated system, exploring how the association patterns within the volatile network are intricately rewired in response to varying levels of tea aphid infestation. The combinatorial application of multivariate methods and network analyses offers a novel perspective for studying tea plant volatiles, enhancing our understanding of their roles in tea plant response against tea aphid feeding.
[学术文献 ] Challenges of climate change and air pollution for volatile-mediated plant-parasitoid signalling 进入全文
Current Opinion in Insect Science 期刊
Herbivore-induced plant volatiles (HIPVs) are reliable cues that parasitoids can use to locate host patches. Interactions mediated by plant volatile organic compounds (VOCs) are vulnerable to disturbance by predicted climate change and air pollution scenarios. Abiotic stress–induced VOCs may act as false signals to parasitoids. Air pollutants can disrupt signalling by degrading HIPVs at different rates and preventing the perception of olfactory signals by reducing the sensitivity of olfactory receptors or by occluding insect sensillae. As essential components of biological control programmes, efforts should be made to assess how different parasitoid species respond and adapt to HIPVs in predicted scenarios. Since providing parasitoid food sources is a promising practice for boosting biological control, parasitoid–flower interactions deserve attention.
[学术文献 ] Analysis of In Vivo Plant Volatiles Using Active Sampling and TD-GC×GC-TOFMS 进入全文
Metabolites 期刊
In this study, an in vivo plant sampling technique is introduced and validated using active sampling and thermal desorption (TD) tubes with comprehensive two-dimensional gas chromatography coupled to a time-of-flight mass spectrometer (TD-GC×GC-TOFMS). The purpose of this work is to highlight a novel technique to analyze headspace secondary plant metabolites with a minimal invasiveness. Results: It was concluded that in vivo active sampling onto TD tubes provides a wider global coverage of compounds and larger peak areas when compared to extraction by solid-phase microextraction (SPME). Additionally, the Horwitz ratio of active sampling onto TD tubes was 0.893, demonstrating this technique to be a reliable and reproducible method. Lastly, a variety of plants were sampled to assess the versatility of this technique across various plant species with different sizes and volatile profiles. Hundreds of compounds were measured with this analysis, including terpenes, aldehydes, ketones, terpenoids, and alcohols. Conclusions: This novel in vivo active sampling method provides an additional technique for extracting and analyzing volatile secondary plant metabolites.
[相关专利 ] VOLATILE ORGANIC MOLECULES OF FUNGAL ORIGIN FOR REGULATING PLANT GROWTH, COMPOSITIONS, AND USE THEREOF 进入全文
墨西哥专利
本发明公开了具有低分子量和高蒸气压的挥发性有机分子，用于调节植物生长，增加根和叶系统的生物量，并通过增加初级侧向种子的数量和长度来改变其形态。所述化合物由存在于干旱和半干旱环境中植物物种的微生物群中真菌天然产生，例如龙舌兰和仙人掌。它由具有生物活性的组合物组成，在不同植物物种中使用特定浓度的纯分子进行验证。生物活性包括高达100uM的范围，发现未用所述化合物处理的植物的总生物量增加了1.1至2.3倍。 此外，本发明考虑使用所鉴定的挥发性有机物质的微生物制剂。
[会议论文 ] Behavioral Responses of Aphid (Myzus Persicae) to Volatiles from Non-Host Plant Lavender (Lavandula Angustifolia) 进入全文
Proceeding - EESED 2016
Volatile organic compounds (VOCs) can have an important influence on plant-insect interactions. In particular, insect behaviors are often influenced by the volatiles of both host plants and non-host plants. The objective of this study was to assess the behavioral responses of the tobacco aphid, Myzus persicae to the volatiles of Lavandula angustifolia (Lamiaceae). Our studies using a range doses of plants have shown that, When the mass of L. angustifolia was more than or equal to 4.0 g, volatiles emitted from plants showed repellent effects on M. persicae, but at masses of less than 4.0 g, M. persicae did not exhibit significantly preference. These findings provide new insights into the interactions between L. angustifolia plants and M. persicae, which will contribute to the development of new management strategies for biological control of insect pests.
