Secondary metabolites responses of plants exposed to ozone: an update

Singh, Aditya Abha; Ghosh, Amlan; Agrawal, Madhoolika; Agrawal, Shashi Bhushan

doi:10.1007/s11356-023-28634-2

Cited by 18 publications

(9 citation statements)

References 309 publications

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“…Water stress triggers the accumulation of ROS, including O 2 – and CO 2 , in various cellular organelles, such as chloroplasts, mitochondria, and peroxisomes. This accumulation of ROS contributes to oxidative stress in plants, which can damage cellular components and impair normal plant functions . In response to oxidative stress, plants activate their antioxidant defense mechanisms.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Al-Gahtany,

Meganid,

Alshangiti

et al. 2024

ACS Agric. Sci. Technol.

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Drought stress significantly affects plant growth and productivity, including sunflowers (Helianthus annuus L.). Superabsorbent hydrogels, specifically composed of dextrin and polyacrylamide, offer a potential solution to mitigate drought stress and enhance the biochemical traits of sunflowers. This study explored the impact of copolymer composition on the gel fraction, swelling behavior, water retention, morphology, and chemical structure of dextrin (Dix)/polyacrylamide (PAAm) hydrogels synthesized via radical polymerization. Results revealed that the 50/50 ratio of the Dix/PAAm hydrogel exhibited desirable characteristics, including a heterogeneous pore structure (approximately 100 μm) and higher water absorption capacity attributed to a greater Dix content. In a pot experiment, the (Dix/PAAm) hydrogel played a crucial role in alleviating the harmful effects of drought stress on the growth, chlorophyll content, fresh shoot weight, and pigments in sunflowers. The hydrogel application positively influenced these parameters by enhancing water retention, nutrient availability, and physiological responses to drought stress. Overall, these findings highlight the potential of the (Dix/PAAm) hydrogel as an effective tool for enhancing plant resilience to drought stress and promoting growth and biochemical traits in sunflowers.

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Section: Resultsmentioning

confidence: 99%

Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Al-Gahtany,

Meganid,

Alshangiti

et al. 2024

ACS Agric. Sci. Technol.

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“…A possible explanation is that both O 3 and drought had overwhelmed the resistance ability of plants to oxidative stress (Alonso et al, 2001). Furthermore, photosynthetic carbon is used not only for synthesising such antioxidant substances and secondary metabolites but also for biomass accumulation (Karabourniotis et al, 2014;Pizarro & Bisigato, 2010;Poorter & Kitajima, 2007;Singh et al, 2023). Therefore, plant responses to resource partitioning often result in a trade-off between growth and defense under O 3 and drought stresses.…”

Section: Discussionmentioning

confidence: 99%

Drought mitigates the adverse effects of O₃ on plant photosynthesis rather than growth: A global meta‐analysis considering plant functional types

Shang,

Agathokleous,

Calatayud

et al. 2024

Plant Cell & Environment

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Tropospheric ozone (O3) is a phytotoxic air pollutant adversely affecting plant growth. High O3 exposures are often concurrent with summer drought. The effects of both stresses on plants are complex, and their interactions are not yet well understood. Here, we investigate whether drought can mitigate the negative effects of O3 on plant physiology and growth based on a meta‐analysis. We found that drought mitigated the negative effects of O3 on plant photosynthesis, but the modification of the O3 effect on the whole‐plant biomass by drought was not significant. This is explained by a compensatory response of water‐deficient plants that leads to increased metabolic costs. Relative to water control condition, reduced water treatment decreased the effects of O3 on photosynthetic traits, and leaf and root biomass in deciduous broadleaf species, while all traits in evergreen coniferous species showed no significant response. This suggested that the mitigating effects of drought on the negative impacts of O3 on the deciduous broadleaf species were more extensive than on the evergreen coniferous ones. Therefore, to avoid over‐ or underestimations when assessing the impact of O3 on vegetation growth, soil moisture should be considered. These results contribute to a better understanding of terrestrial ecosystem responses under global change.

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“…According to the predictions of Wang et al [ 92 ], the increase in atmospheric O 3 has been estimated to be 20–25% by 2050 and it has already been proven that a high content of O 3 can negatively affect plant metabolism and growth [ 93 , 94 , 95 ] which usually triggers an increase in ROS metabolism [ 96 , 97 ]. For example, in tobacco plants exposed to O 3 , an accumulation of • NO and H 2 O 2 was found [ 98 ].…”

Section: Atmospheric Pollutants and Higher Plant Response—what Happen...mentioning

confidence: 99%

NO and H2S Contribute to Crop Resilience against Atmospheric Stressors

Corpas

2024

IJMS

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Atmospheric stressors include a variety of pollutant gases such as CO2, nitrous oxide (NOx), and sulfurous compounds which could have a natural origin or be generated by uncontrolled human activity. Nevertheless, other atmospheric elements including high and low temperatures, ozone (O3), UV-B radiation, or acid rain among others can affect, at different levels, a large number of plant species, particularly those of agronomic interest. Paradoxically, both nitric oxide (NO) and hydrogen sulfide (H2S), until recently were considered toxic since they are part of the polluting gases; however, at present, these molecules are part of the mechanism of response to multiple stresses since they exert signaling functions which usually have an associated stimulation of the enzymatic and non-enzymatic antioxidant systems. At present, these gasotransmitters are considered essential components of the defense against a wide range of environmental stresses including atmospheric ones. This review aims to provide an updated vision of the endogenous metabolism of NO and H2S in plant cells and to deepen how the exogenous application of these compounds can contribute to crop resilience, particularly, against atmospheric stressors stimulating antioxidant systems.

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Secondary metabolites responses of plants exposed to ozone: an update

Cited by 18 publications

References 309 publications

Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Drought mitigates the adverse effects of O₃ on plant photosynthesis rather than growth: A global meta‐analysis considering plant functional types

NO and H2S Contribute to Crop Resilience against Atmospheric Stressors

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Secondary metabolites responses of plants exposed to ozone: an update

Cited by 18 publications

References 309 publications

Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Enhancing Growth and Biochemical Traits of Helianthus annuus L. Under Drought Stress Using a Super Absorbent Dextrin–Polyacrylamide Hydrogel as a Soil Conditioner

Drought mitigates the adverse effects of O3 on plant photosynthesis rather than growth: A global meta‐analysis considering plant functional types

NO and H2S Contribute to Crop Resilience against Atmospheric Stressors

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Drought mitigates the adverse effects of O₃ on plant photosynthesis rather than growth: A global meta‐analysis considering plant functional types