Integration of multiple volatile cues into plant defense responses

Hu, Lingfei

doi:10.1111/nph.17724

Cited by 24 publications

(20 citation statements)

References 58 publications

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“…Based on their phenotypic plasticity in metabolism of phytochemicals (Schwachtje et al ., 2019), plants respond to environmental challenges by rapidly changing their metabotypes. For example, in response to increasing ultraviolet radiation, flavonoids and chromene compounds are induced (Samanta et al ., 2011; Glassmire et al ., 2019); drought triggers enhanced concentrations of osmolytes or terpenoids (Singh et al ., 2015; Wang et al ., 2021), while herbivory leads to induction of numerous phytochemicals, including volatiles (terpenoids, fatty acid derivatives and aromatic compounds; Hu, 2022) as well as non‐volatile compounds acting as defenses (e.g. alkaloids, phenolics; Kessler & Kalske, 2018).…”

Section: Niche Realization Processesmentioning

confidence: 99%

Chemical phenotype as important and dynamic niche dimension of plants

Müller

Junker

2022

New Phytologist

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Niche theory considering the traits of species and individuals provides a powerful tool to integrate ecology and evolution of species. In plant ecology, morphological and physiological traits are commonly considered as niche dimensions, whereas phytochemical traits are mostly neglected in this context despite their pivotal functions in plant responses to their environment and in mediating interactions. The diversity of plant phytochemicals can thus mediate three key processes: niche choice, conformance and construction. Here, we integrate frameworks from niche theory with chemical ecology and argue that plants use their individual-specific diversity in phytochemicals (chemodiversity) for different niche realization processes. Our concept has important implications for ecosystem processes and stability and increases the predictive ability of chemical ecology.

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Section: Niche Realization Processesmentioning

confidence: 99%

Chemical phenotype as important and dynamic niche dimension of plants

Müller

Junker

2022

New Phytologist

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“…The MeSA variations followed the inverse pattern of cis β-Farnesene and β-Ionone for C. floribundus, while in A. graveolens, its levels increased after 2dO 3 . Based on these results we hypothesized that BVOCs would act as signaling compounds in primary defense mechanisms with greater intensity in C. floribundus than in A. graveolens, preparing the species for future stress (Hu, 2022). PCD and H 2 O 2 results may support this hypothesis since O 3 could promote H 2 O 2 accumulation in A. graveolens.…”

Section: O 3 Effect On Bvoc Responsesmentioning

confidence: 86%

Ozone Impact on Emission of Biogenic Volatile Organic Compounds in Three Tropical Tree Species From the Atlantic Forest Remnants in Southeast Brazil

et al. 2022

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Plants emit a broad number of Biogenic Volatile Organic Compounds (BVOCs) that can impact urban ozone (O3) production. Conversely, the O3 is a phytotoxic pollutant that causes unknown alterations in BVOC emissions from native plants. In this sense, here, we characterized the constitutive and O3-induced BVOCs for two (2dO3) and four (4dO3) days of exposure (O3 dose 80 ppb) and evaluated the O3 response by histochemical techniques to detect programmed cell death (PCD) and hydrogen peroxide (H2O2) in three Brazilian native species. Croton floribundus Spreng, Astronium graveolens Jacq, and Piptadenia gonoacantha (Mart.) JF Macbr, from different groups of ecological succession (acquisitive and conservative), different carbon-saving defense strategies, and specific BVOC emissions. The three species emitted a very diverse BVOC composition: monoterpenes (MON), sesquiterpenes (SEQ), green leaf volatiles (GLV), and other compounds (OTC). C. floribundus is more acquisitive than A. graveolens. Their most representative BVOCs were methyl salicylate—MeSA (OTC), (Z) 3-hexenal, and (E)-2-hexenal (GLV), γ-elemene and (−)-β-bourbonene (SEQ) β-phellandrene and D-limonene (MON), while in A. graveolens were nonanal and decanal (OTC), and α-pinene (MON). Piptadenia gonoachanta is more conservative, and the BVOC blend was limited to MeSA (OTC), (E)-2-hexenal (GLV), and β-Phellandrene (MON). The O3 affected BVOCs and histochemical traits of the three species in different ways. Croton floribundus was the most O3 tolerant species and considered as an SEQ emitter. It efficiently reacted to O3 stress after 2dO3, verified by a high alteration of BVOC emission, the emergence of the compounds such as α-Ionone and trans-ß-Ionone, and the absence of H2O2 detection. On the contrary, A. graveolens, a MON-emitter, was affected by 2dO3 and 4dO3, showing increasing emissions of α-pinene and β-myrcene, (MON), γ-muurolene and β-cadinene (SEQ) and H2O2 accumulation. Piptadenia gonoachanta was the most sensitive and did not respond to BVOCs emission, but PCD and H2O2 were highly evidenced. Our results indicate that the BVOC blend emission, combined with histochemical observations, is a powerful tool to confirm the species’ tolerance to O3. Furthermore, our findings suggest that BVOC emission is a trade-off associated with different resource strategies of species indicated by the changes in the quality and quantity of BVOC emission for each species.

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“…Plant responses to volatiles are regulated by the jasmonate defense signaling (Arimura et al ., 2000; Hu, 2022). The jasmonate pathway is part of an integrated signaling network that controls plant growth and defense responses, including the emission of volatiles (Schmelz et al ., 2003; Bosch et al ., 2014; Mujiono et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Besides responding to changes in the light spectrum, plants can also perceive and respond to volatile organic compounds emitted by herbivores (Helms et al ., 2017) and neighboring plants (Hu, 2022). When a plant is attacked, it releases distinct blends of herbivore induced volatiles (HIPVs).…”

Section: Introductionmentioning

confidence: 99%

Far-red light increases maize volatile emissions in response to volatile cues from neighboring plants

Escobar‐Bravo

Schimmel

Zhang

et al. 2022

Preprint

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Plants perceive the presence and defense status of their neighbors through light and volatile cues. How plants integrate these stimuli into adaptive responses is not well understood. We investigated whether perception of vegetation through the reduction in Red to Far Red light (R:FR) ratios affects maize (Zea mays) responses to the herbivore-induced plant volatile (Z)-3-hexenyl acetate. By supplementing FR light and using a phyB1phyB2 maize mutant, we modulated plant light signaling and perception and determined defense responses, including stress hormone deployment and volatile release. Exposure to (Z)-3-hexenyl acetate induced maize volatile release. FR supplementation increased this response. FR also boosted (Z)-3-hexenyl acetate induced JA-Ile levels and promoted stomatal opening and photosynthesis. FR effects were most pronounced after 2 days of light treatment, becoming weaker with longer exposures. In contrast to FR supplementation, the phyB1phyB2 mutant displayed reduced volatile responsiveness. Comparative analyses with wheat and tomato revealed that the integration of light and volatile cues into enhanced volatile-release is species-specific. In conclusion, FR light enhances maize volatile emissions in response to stress volatiles, likely via stronger hormonal signaling and enhanced photosynthesis. Species-specific integration of light and volatile cues into distinct defense responses may have important consequences for plant-plant and plant-herbivore dynamics.

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Integration of multiple volatile cues into plant defense responses

Cited by 24 publications

References 58 publications

Chemical phenotype as important and dynamic niche dimension of plants

Chemical phenotype as important and dynamic niche dimension of plants

Ozone Impact on Emission of Biogenic Volatile Organic Compounds in Three Tropical Tree Species From the Atlantic Forest Remnants in Southeast Brazil

Far-red light increases maize volatile emissions in response to volatile cues from neighboring plants

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