Volatile Allelochemicals

Souza, Alicia Ludymilla Cardoso de; Matos, Chrystiaine Helena Campos de; Silva, Renan Campos e

doi:10.1007/978-3-030-99476-1_11

Cited by 4 publications

(3 citation statements)

References 58 publications

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“…The allelopathic potential (i.e., the production of chemicals by a plant species that can affect the growth, survival, development, reproduction, or behavior of neighboring organisms) of root exudates has been extensively studied and acknowledged as a key trait contributing to invasive plants' ecological success (Chengxu et al, 2011;Chen et al, 2017;Kalisz et al, 2021). However, less is known about volatile (airborne) allelochemicals, which are also likely to play crucial ecological roles (Xie et al, 2021;de Souza et al, 2022).…”

Section: Box Defining Biological Invasionmentioning

confidence: 99%

Ecological aspects of volatile organic compounds emitted by exotic invasive plants

2023

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Exotic invasive plants are present in almost all terrestrial ecosystems. Their spread and ability to colonize new habitats are predicted to increase with human travel, global trade, and climate change. These plants alter the environments they invade in multiple ways, affecting surrounding species. Chemically, invasive plants can modify their environment by releasing secondary metabolites such as root exudates (liquid) or airborne (gaseous) volatile organic compounds (VOCs). The allelopathic effect of invasive species' root exudates is well studied and acknowledged as a trait contributing to invasiveness. However, less is known about the effects of invasive species' VOCs, which are likely to play important ecological roles. Therefore, we conducted a systematic review of the literature during the last decade (2012–2022) to explore what is known about the ecological aspects of VOCs emitted by invasive plants, focusing on the factors affecting their emission (genetic, biotic, and abiotic), and their role on plant-plant and plant-insect interactions. We found 29 studies matching our search criteria. These studies suggest that invasive species are more “chemically diverse” than their native counterparts and have different chemical behavior in native compared to invaded ranges. The studies further highlight that chemical traits are heritable and contribute to invasiveness. Multiple biotic and abiotic factors affecting invasive plants' VOC emission have been explored (e.g., herbivory, soil microorganisms, warming, and CO2). The studies indicate that invasive plants may experience less variation in their VOC emissions in response to environmental change than natives, with trade-offs between growth, reproduction and defense influencing VOC emissions. Regarding the impact on native species and their interactions, the allelopathic role of invasive plants' VOCs on native plants is well documented, consistently showing phytotoxic effects. There is also evidence of their involvement in neighbor detection. While volatile-mediated interactions between invasive plants and native insects remain poorly studied, the existing evidence shows that invasive plant VOCs have the potential to disrupt communication between native plants and insects. But insects also use multiple cues to make foraging/oviposition decisions, compensating for the disruptive effect of invasive plant VOCs. To conclude, we identify knowledge gaps and propose avenues for future research.

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Section: Box Defining Biological Invasionmentioning

confidence: 99%

Ecological aspects of volatile organic compounds emitted by exotic invasive plants

2023

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“…In light of the significant challenges posed by already existing synthetic herbicides and resistant weeds, substitute to harmful chemicals with potentially varied modes of action is necessary for long-term weed control strategies. Employment of plant based allelochemicals in this regard could progress towards greener and safer agriculture providing wide range of opportunities to cope with weed management [ 26 – 28 ]. The allelochemicals are secondary metabolites generated by different plant parts as a result of exudation, volatilization, and leaching and they have the potential to affect the development of nearby plants [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Biochemical analysis, photosynthetic gene (psbA) down–regulation, and in silico receptor prediction in weeds in response to exogenous application of phenolic acids and their analogs

2023

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Chemical herbicides are the primary weed management tool, although several incidences of herbicide resistance have emerged, causing serious threat to agricultural sustainability. Plant derived phenolic acids with herbicidal potential provide organic and eco-friendly substitute to such harmful chemicals. In present study, phytotoxicity of two phenolic compounds, ferulic acid (FA) and gallic acid (GA), was evaluated in vitro and in vivo against three prevalent herbicide-resistant weed species (Sinapis arvensis, Lolium multiflorum and Parthenium hysterophorus). FA and GA not only suppressed the weed germination (80 to 60% respectively), but also negatively affected biochemical and photosynthetic pathway of weeds. In addition to significantly lowering the total protein and chlorophyll contents of the targeted weed species, the application of FA and GA treatments increased levels of antioxidant enzymes and lipid peroxidation. Photosynthetic gene (psbA) expression was downregulated (10 to 30 folds) post 48 h of phenolic application. In silico analysis for receptor identification of FA and GA in psbA protein (D1) showed histidine (his-198) and threonine (thr-286) as novel receptors of FA and GA. These two receptors differ from the D1 amino acid receptors which have previously been identified (serine-264 and histidine-215) in response to PSII inhibitor herbicides. Based on its toxicity responses, structural analogs of FA were also designed. Four out of twelve analogs (0.25 mM) significantly inhibited weed germination (30 to 40%) while enhancing their oxidative stress. These results are unique which provide fundamental evidence of phytotoxicity of FA and GA and their analogs to develop cutting-edge plant based bio-herbicides formulation in future.

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“…In light of the significant challenges posed by already existing synthetic herbicides and resistant weeds, substitute to harmful chemicals with potentially varied modes of action is necessary for long-term weed control strategies. Employment of plant based allelochemicals in this regard could progress towards safer agriculture providing wide range of opportunities to cope with weed management [14][15][16]. These allelochemicals are secondary metabolites generated by different plant parts as a result of exudation, volatilization, and leaching and they have the potential to affect the development of nearby plants [17].…”

Section: Introductionmentioning

confidence: 99%

Biochemical analysis, photosynthetic gene (psbA) down–regulation, andin silicoreceptor prediction in weeds in response to exogenous application of phenolic acids and their analogs

Anwar

Naseem

Ali

2022

Preprint

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Chemical herbicides are the primary weed management tool, although several incidences of herbicide resistance have been emerged, causing serious threat to agricultural sustainability. Plant derived phenolic acids with herbicidal potential may provide organic and eco-friendly substitute to such harmful chemicals. In present study, efficacy of two phenolic compounds, ferulic acid (FA) and gallic acid (GA), were evaluatedin vitroandin vivoagainst three prevalent herbicide-resistant weed species (Sinapis arvensis, Lolium multiflorumandParthenium hysterophorus). FA and GA not only suppressed the weed germination (80 to 60 % respectively), but also inhibited biochemical and photosynthetic pathway of weeds. In addition to significantly lowering the total protein and chlorophyll contents of the targeted weed species, the application of FA and GA treatments increased the levels of antioxidant enzymes and lipid peroxidation. Photosynthetic gene (psbA) expression was downregulated (10 to 30 folds) post 48 h of phenolic application.In silicoanalysis for receptor identification of FA and GA in psbA protein (D1) showed histidine (his-198) and threonine (thr-286) as novel receptors of FA and GA. These two receptors differ from the D1 amino acid receptors which have previously been identified (serine-264 and histidine-215) in response to PSII inhibitor herbicides. Based on its toxicity responses, structural analogs of FA were also designed. Four out of twelve analogs (0.25 mM) significantly inhibited weed germination (30 to 40%) while enhancing their oxidative stress. These results are unique which provide fundamental evidence of phytotoxicity of FA and GA and their analogs to develop cutting-edge plant based formulation to suppress weed growth in future.

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Volatile Allelochemicals

Cited by 4 publications

References 58 publications

Ecological aspects of volatile organic compounds emitted by exotic invasive plants

Ecological aspects of volatile organic compounds emitted by exotic invasive plants

Biochemical analysis, photosynthetic gene (psbA) down–regulation, and in silico receptor prediction in weeds in response to exogenous application of phenolic acids and their analogs

Biochemical analysis, photosynthetic gene (psbA) down–regulation, andin silicoreceptor prediction in weeds in response to exogenous application of phenolic acids and their analogs

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