Nonlinear responses of foliar phenylpropanoids to increasing O3 exposure: Ecological implications in a Populus model system

Li, Zhengzhen; Yang, Jian; Shang, Bo; Agathokleous, Evgenios; Rubert‐Nason, Kennedy F.; Xu, Yansen; Feng, Zhaozhong

doi:10.1016/j.scitotenv.2020.144358

Cited by 22 publications

(7 citation statements)

References 54 publications

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“…'74/76') can modulate the redox levels within organisms and enhance oxidative stress defense by responding to ozone-induced hormesis. Additionally, this effect is subject to modulation by soil nitrogen 88 .…”

Section: Discussionmentioning

confidence: 99%

Current advances and future trends of hormesis in disease

Wan,

Liu,

Mai

et al. 2024

npj Aging

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Hormesis, an adaptive response, occurs when exposure to low doses of a stressor potentially induces a stimulatory effect, while higher doses may inhibit it. This phenomenon is widely observed across various organisms and stressors, significantly advancing our understanding and inspiring further exploration of the beneficial effects of toxins at doses both below and beyond traditional thresholds. This has profound implications for promoting biological regulation at the cellular level and enhancing adaptability throughout the biosphere. Therefore, conducting bibliometric analysis in this field is crucial for accurately analyzing and summarizing its current research status. The results of the bibliometric analysis reveal a steady increase in the number of publications in this field over the years. The United States emerges as the leading country in both publication and citation numbers, with the journal Dose–Response publishing the highest number of papers in this area. Calabrese E.J. is a prominent person with significant contributions and influence among authors. Through keyword co-occurrence and trend analysis, current hotspots in this field are identified, primarily focusing on the relationship between hormesis, oxidative stress, and aging. Analysis of highly cited references predicts that future research trends may center around the relationship between hormesis and stress at different doses, as well as exploring the mechanisms and applications of hormesis. In conclusion, this review aims to visually represent hormesis-related research through bibliometric methods, uncovering emerging patterns and areas of focus within the field. It provides a summary of the current research status and forecasts trends in hormesis-related research.

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Section: Discussionmentioning

confidence: 99%

Current advances and future trends of hormesis in disease

Wan,

Liu,

Mai

et al. 2024

npj Aging

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“…The inconsistent response of polyphenols across different studies might be attributed to the concept of O 3 -induced hormesis in plants. This theory suggests that the production of antioxidative compounds may increase at low-to-moderate O 3 exposures but decline when the defense response is overwhelmed under higher O 3 exposure [ 21 , 29 ]. In the present study, antioxidant capacity in tea leaves mirrored the response of phenolics and showed no response to elevated O 3 , which potentially supports the concept of hormesis.…”

Section: Discussionmentioning

confidence: 99%

“…Concentrations of total polyphenols were analyzed using a Folin–Ciocalteu assay with a slight modification [ 21 ]. In brief, 20–30 mg of leaf powder was extracted with 1.5 mL methanol, with 30 min of sonication.…”

Section: Methodsmentioning

confidence: 99%

“…In general, elevated O 3 leads to reduced amino acid concentrations due to increased consumption for antioxidant synthesis and repair processes upon O 3 damage [ 18 ]. The responses of phenolics to elevated O 3 are complex: lignin typically accumulates in plants grown under elevated O 3 to provide a physical barrier to O 3 [ 19 ], while concentrations of other phenolics (e.g., catechins, condensed tannins) generally increase at a relatively low dose but may decline under a higher dose of O 3 exposure [ 20 , 21 ]. The effects of O 3 on BVOCs vary among types of volatiles, with total BVOCs increased but isoprene generally reduced in response to elevated O 3 [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Elevated Ozone Reduces the Quality of Tea Leaves but May Improve the Resistance of Tea Plants

Wang,

Zhang

et al. 2024

Plants

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Tropospheric ozone (O3) pollution can affect plant nutritional quality and secondary metabolites by altering plant biochemistry and physiology, which may lead to unpredictable effects on crop quality and resistance to pests and diseases. Here, we investigated the effects of O3 (ambient air, Am; ambient air +80 ppb of O3, EO3) on the quality compounds and chemical defenses of a widely cultivated tea variety in China (Camellia sinensis cv. ‘Baiye 1 Hao’) using open-top chamber (OTC). We found that elevated O3 increased the ratio of total polyphenols to free amino acids while decreasing the value of the catechin quality index, indicating a reduction in leaf quality for green tea. Specifically, elevated O3 reduced concentrations of amino acids and caffeine but shows no impact on the concentrations of total polyphenols in tea leaves. Within individual catechins, elevated O3 increased the concentrations of ester catechins but not non-ester catechins, resulting in a slight increase in total catechins. Moreover, elevated O3 increased the emission of biogenic volatile organic compounds involved in plant defense against herbivores and parasites, including green leaf volatiles, aromatics, and terpenes. Additionally, concentrations of main chemical defenses, represented as condensed tannins and lignin, in tea leaves also increased in response to elevated O3. In conclusion, our results suggest that elevated ground-level O3 may reduce the quality of tea leaves but could potentially enhance the resistance of tea plants to biotic stresses.

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“…With this aim, the contributions of the defense systems in the cytosol and cell wall to O 3 tolerance in Asian species have been of particular interest (Feng et al 2010), but still remain unclear (Wang et al 2015;Dai et al 2020). Some research groups working on defense metabolism under O 3 stress attempted to improve current knowledge about the genetic and molecular basis of ascorbate-glutathione pathways (Zhang et al 2017), the different enzymatic isoforms involved and their respective compartments (Rahantaniaina et al 2017), other antioxidants within secondary metabolism, such as phenolics (Li et al 2021), or specific defense structures, such as glandular trichomes (Li et al 2018b). However, these efforts are still at the initial stages and, thus, the understandings are yet to be developed.…”

Section: Variation In Ozone Susceptibility/tolerance Between Crop Species and Varietiesmentioning

confidence: 99%

Emerging challenges of ozone impacts on asian plants: actions are needed to protect ecosystem health

Zhu

Agathokleous

Yue

et al. 2021

Ecosyst Health Sustain

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Context: Ozone concentrations near the land surface are rising in Asia while they are declining or stagnating in Europe and North America. Ozone is the most widespread air pollutant negatively affecting vegetation, and its increased concentrations pose a major threat to food quality and production and other ecosystem services in Asia. Method: In this review, we provide an overview of scientific challenges in the impacts of ozone pollution on Asian vegetation, and synthesize the challenges toward mitigation of the impacts. Result: We argue that new policy initiatives need to seek both reduction of ozone levels and enhancement of plant tolerance to ozone to maintain food quality and ensure food supplies. Conclusion:The scientific advancements must be transferred to actions by two types of institutions: a) environmental agencies for reducing ozone levels and b) agricultural research institutions for enhancing plant tolerance to ozone. In connecting the scientific advancements with the institutional actions, scientists in Asian countries should play the key role taking advantages of interdisciplinary and international collaborations.

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Nonlinear responses of foliar phenylpropanoids to increasing O3 exposure: Ecological implications in a Populus model system

Cited by 22 publications

References 54 publications

Current advances and future trends of hormesis in disease

Current advances and future trends of hormesis in disease

Elevated Ozone Reduces the Quality of Tea Leaves but May Improve the Resistance of Tea Plants

Emerging challenges of ozone impacts on asian plants: actions are needed to protect ecosystem health

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