Effects of Low Concentrations of Ozone (O3) on Metabolic and Physiological Attributes in Wheat (Triticum aestivum L.) Pants

Baqasi, Laila A.; Qari, Huda A.; Al‐Nahhas, Adil; Badr, Reem H.; Taia, Wafaa Kamal; El-Dakkak, Rehab A.

doi:10.13005/bpj/1450

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…This finding was consistent with the decreased protein levels due to ozone exposure in groundnuts (Sahab et al, 2013) and chickpea seeds (Nickhil et al, 2012). Ozone can reduce protein and amino acid levels (Baqasi et al, 2018). Ozone reactions with proteins can change the nature of polypeptide protein backbones, break peptide bonds, crosslink proteins, and modify amino acid side chains, which result in denatura-tion and to changes in protein solubility (Uzun et al, 2012), resulting in severe protein degradation in aged seeds.…”

Section: Resultsmentioning

confidence: 99%

Field effectiveness of gaseous ozone storage in alleviating damage to aged soybean seeds

Ambarsari,

Cempaka,

Santoso

et al. 2023

Int. Agrophys.

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Ozonation is a promising method for maintaining seed quality. However, the ability of ozone to preserve the quality of aged seeds, which have already deteriorated, is still open to question. This study evaluated the effectiveness of ozone in alleviating ageing soybean seed damage and also the economic feasibility of ozone technology under field conditions. Samples under ozonation storage (they were stored in open containers and woven sacks) were compared with those stored under conventional storage conditions (they were stored in woven bags without ozonation). Ozonated samples were exposed to 150 g h -1 of ozone gas for three hours a day for a six month storage period. All samples (with and without ozonation) were stored at 18±5°C and 50±5% relative humidity. Observations were conducted every month with regard to the seeds germination percentage, vigour index, moisture content, protein and free fatty acids. The results showed that ozonation has the potential to increase the viability of aged soybean seeds for up to 5 months. However, the decrease in the protein and free fatty acids levels in the ozonated seeds occurred more rapidly than in the control. Moreover, no significant difference was found between the ozonated seeds in open containers and sacks during storage, except for their moisture content. Ozone application on aged soybean seeds was found to be financially feasible with an ratio of revenue to cost value of 1.73, an return on investment of 74.63% and a payback period of 1.34 years.K e y w o r d s: aged seed, soybean, ozone, quality, economic feasibility

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Section: Resultsmentioning

confidence: 99%

Field effectiveness of gaseous ozone storage in alleviating damage to aged soybean seeds

Ambarsari,

Cempaka,

Santoso

et al. 2023

Int. Agrophys.

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“…HD 2967 under ambient and elevated (ambient+20 ppb) O 3 stress for 4 hours day −1 from 2 weeks after germination to maturity. Baqasi et al (2018) reported a 49% decline in grain dry mass in wheat after 50 ppb O 3 exposure. Ozone also influences the quality of crops in terms of starch, protein, nutrients, and oil content.…”

Section: Crop Yield and Qualitymentioning

confidence: 99%

Elevated tropospheric ozone and crop production: potential negative effects and plant defense mechanisms

Nowroz,

Hasanuzzaman,

Siddika

et al. 2024

Front. Plant Sci.

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Ozone (O3) levels on Earth are increasing because of anthropogenic activities and natural processes. Ozone enters plants through the leaves, leading to the overgeneration of reactive oxygen species (ROS) in the mesophyll and guard cell walls. ROS can damage chloroplast ultrastructure and block photosynthetic electron transport. Ozone can lead to stomatal closure and alter stomatal conductance, thereby hindering carbon dioxide (CO2) fixation. Ozone-induced leaf chlorosis is common. All of these factors lead to a reduction in photosynthesis under O3 stress. Long-term exposure to high concentrations of O3 disrupts plant physiological processes, including water and nutrient uptake, respiration, and translocation of assimilates and metabolites. As a result, plant growth and reproductive performance are negatively affected. Thus, reduction in crop yield and deterioration of crop quality are the greatest effects of O3 stress on plants. Increased rates of hydrogen peroxide accumulation, lipid peroxidation, and ion leakage are the common indicators of oxidative damage in plants exposed to O3 stress. Ozone disrupts the antioxidant defense system of plants by disturbing enzymatic activity and non-enzymatic antioxidant content. Improving photosynthetic pathways, various physiological processes, antioxidant defense, and phytohormone regulation, which can be achieved through various approaches, have been reported as vital strategies for improving O3 stress tolerance in plants. In plants, O3 stress can be mitigated in several ways. However, improvements in crop management practices, CO2 fertilization, using chemical elicitors, nutrient management, and the selection of tolerant crop varieties have been documented to mitigate O3 stress in different plant species. In this review, the responses of O3-exposed plants are summarized, and different mitigation strategies to decrease O3 stress-induced damage and crop losses are discussed. Further research should be conducted to determine methods to mitigate crop loss, enhance plant antioxidant defenses, modify physiological characteristics, and apply protectants.

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“…However, per metre square of crop the starch and grain protein yield is reduced (Broberg et al, 2015;Feng, Kobayashi and Ainsworth, 2008;Gelang et al, 2000). Some wheat cultivars have shown a decrease in grain protein concentration under O3 exposure (Yadav et al, 2019a;Baqasi et al, 2018;Mishra, Rai and Agrawal, 2013). This could be because leaf proteins are being converted to enzymatic antioxidants to provide defence against O3 induced damages, resulting in less proteins available for translocation to the grains (Yadav et al, 2019b;Sarkar et al, 2010;Fatima et al, 2018).…”

Section: #6mentioning

confidence: 99%

New ozone-nitrogen model shows early senescence onset is the primary cause of ozone-induced reduction in grain quality of wheat

Cook,

Brewster,

Hayes

et al. 2024

Preprint

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Abstract. Ozone (O3) air pollution is well known to adversely affect both the grain and protein yield of wheat, an important staple crop. This study aims to identify and model the key plant processes influencing the effect of O3 on wheat protein. We modified the DO3SE-Crop model to incorporate nitrogen (N) processes, and parameterised the O3 effect on stem, leaf and grain N using O3 fumigation datasets spanning 3 years and 4 O3 treatments. Our results show the new model captures the O3 effect on grain N concentrations, and anthesis leaf and stem concentration, well. However, the O3 effect on harvest leaf and stem N is exaggerated. Further, a sensitivity analysis revealed that, irrespective of O3 treatment, accelerated senescence onset was the primary plant process affecting grain N. This modelling study therefore demonstrates the capability of the DO3SE-CropN model to simulate processes by which O3 affects N content, and thereby determines that senescence onset is the main driver of O3 reductions in grain protein yield. The implication of the sensitivity analysis is that breeders should focus their efforts on stay-green cultivars that do not experience a protein penalty when developing O3 tolerant lines, to maintain both wheat yield and nutritional quality under O3 exposure.

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Effects of Low Concentrations of Ozone (O3) on Metabolic and Physiological Attributes in Wheat (Triticum aestivum L.) Pants

Cited by 7 publications

References 15 publications

Field effectiveness of gaseous ozone storage in alleviating damage to aged soybean seeds

Field effectiveness of gaseous ozone storage in alleviating damage to aged soybean seeds

Elevated tropospheric ozone and crop production: potential negative effects and plant defense mechanisms

New ozone-nitrogen model shows early senescence onset is the primary cause of ozone-induced reduction in grain quality of wheat

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