Reactive Oxygen Species and Antioxidant Defense in Plants under Abiotic Stress: Revisiting the Crucial Role of a Universal Defense Regulator

Antioxidants, Journal Year: 2020, Volume and Issue: 9(8), P. 681 - 681

Published: July 29, 2020

Global climate change and associated adverse abiotic stress conditions, such as drought, salinity, heavy metals, waterlogging, extreme temperatures, oxygen deprivation, etc., greatly influence plant growth development, ultimately affecting crop yield quality, well agricultural sustainability in general. Plant cells produce radicals their derivatives, so-called reactive species (ROS), during various processes with stress. Moreover, the generation of ROS is a fundamental process higher plants employs to transmit cellular signaling information response changing environmental conditions. One most crucial consequences disturbance equilibrium between antioxidant defense systems triggering excessive accumulation inducing oxidative plants. Notably, detoxification maintained by both enzymatic nonenzymatic under harsh stresses. Although this field research has attracted massive interest, it largely remains unexplored, our understanding poorly understood. In review, we have documented recent advancement illustrating harmful effects ROS, system involved different stresses, molecular cross-talk other important signal molecules nitrogen, sulfur, carbonyl species. addition, state-of-the-art approaches ROS-mediated improvement acclimation against stresses also been discussed.

Language: Английский

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The Role of Plant Growth-Promoting Bacteria in Alleviating the Adverse Effects of Drought on Plants

Biology, Journal Year: 2021, Volume and Issue: 10(6), P. 520 - 520

Published: June 11, 2021

Plant growth-promoting bacteria play an essential role in enhancing the physical, chemical and biological characters of soils by facilitating nutrient uptake water flow, especially under abiotic stress conditions, which are major constrains to agricultural development production. Drought is one most harmful perhaps severe problem facing sustainability, leading a shortage crop productivity. affects plant growth causing hormonal membrane stability perturbations, imbalance physiological disorders. Furthermore, drought causes remarkable decrease leaf numbers, relative content, sugar yield, root chlorophyll b ascorbic acid concentrations. However, concentrations total phenolic compounds, electrolyte leakage, lipid peroxidation, amounts proline, reactive oxygen species considerably increased because stress. This negative impact can be eliminated using (PGPB). Under application PGPB improve adjusting balance, maintaining status producing regulators. positively biochemical characteristics, resulting photosynthetic pigments acid. Conversely, leakage compounds decreased presence PGPB. The current review gives overview on plants pivotal mitigating effects antioxidant defense systems increasing yield sustainable agriculture.

Language: Английский

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Silicon Foliar Application Mitigates Salt Stress in Sweet Pepper Plants by Enhancing Water Status, Photosynthesis, Antioxidant Enzyme Activity and Fruit Yield

Plants, Journal Year: 2020, Volume and Issue: 9(6), P. 733 - 733

Published: June 10, 2020

Silicon is one of the most significant elements in plants under abiotic stress, so we investigated role silicon alleviation detrimental effects salinity at two concentrations (1500 and 3000 ppm sodium chloride) sweet pepper seasons (2018 2019). Our results indicated that relative water content, chlorophyll a b, nitrogen, phosphorus potassium contents, number fruits plant−1, fruit fresh weight plant−1 (g) yield (ton hectare−1) significantly decreased salt-stressed as compared to control plants. In addition, electrolyte leakage, proline, lipid peroxidation, superoxide (O2−) hydrogen peroxide (H2O2) levels, soluble sugars, sucrose, starch content well increased conditions. Conversely, foliar application led improvements b mineral nutrients, status, Furthermore, levels superoxide, were with treatments.

Language: Английский

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Beneficial Effects of Biochar and Chitosan on Antioxidative Capacity, Osmolytes Accumulation, and Anatomical Characters of Water-Stressed Barley Plants

Agronomy, Journal Year: 2020, Volume and Issue: 10(5), P. 630 - 630

Published: April 29, 2020

The impact of biochar and chitosan on barley plants under drought stress conditions was investigated during two field experiments. Our results confirmed that negatively affected morphological physiological growth traits such as plant height, number leaves, chlorophyll concentrations, relative water content. However, electrolyte leakage (EL%), lipid peroxidation (MDA), soluble sugars, sucrose starch contents significantly increased a response to stress. Additionally, 1000 grain weight, grains yield ha−1 biological decreased in stressed plants, also anatomical upper epidermis, lower lamina, mesophyll tissue thickness well vascular bundle diameter flag leaves compared with control. use led significant increases concentrations content; nevertheless these treatments decreases (EL%) (MDA) the plants. Moreover, characters were improved application chitosan. proved significance alleviating damaging impacts

Language: Английский

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Exogenous Application of Proline and Salicylic Acid can Mitigate the Injurious Impacts of Drought Stress on Barley Plants Associated with Physiological and Histological Characters

Sustainability, Journal Year: 2020, Volume and Issue: 12(5), P. 1736 - 1736

Published: Feb. 26, 2020

Barley is a very important crop worldwide and has good impact in preserving food security. The impacts of 10 mM proline 0.5 salicylic acid were evaluated on water stressed barley plants (Hordeum vulgare L. Giza126). Salicylic treatments led to increased stem length, plant dry weights, chlorophyll concentration, relative content, activity antioxidant enzymes, grain yield under drought stress. Nevertheless, lipid peroxidation, electrolyte leakage (EL), superoxide (O2·−), hydrogen peroxide (H2O2) significantly decreased treated with both growing seasons as compared treatment only, which caused significant decrease well biological yield. These results demonstrated the importance tolerance inducers stress plants.

Language: Английский

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Salicylic acid: A key regulator of redox signalling and plant immunity

Plant Physiology and Biochemistry, Journal Year: 2021, Volume and Issue: 168, P. 381 - 397

Published: Oct. 6, 2021

Language: Английский

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Evaluation of Silicon and Proline Application on the Oxidative Machinery in Drought-Stressed Sugar Beet

Antioxidants, Journal Year: 2021, Volume and Issue: 10(3), P. 398 - 398

Published: March 6, 2021

Drought stress deleteriously affects growth, development and productivity in plants. So, we examined the silicon effect (2 mmol) proline (10 individually or combination (Si + proline) alleviating harmful of drought on total phenolic compounds, reactive oxygen species (ROS), chlorophyll concentration antioxidant enzymes as well yield parameters drought-stressed sugar beet plants during 2018/2019 2019/2020 seasons. Our findings indicated that root diameter length (cm), shoot fresh weights (g plant−1) significantly decreased under drought. Relative water content (RWC), nitrogen (N), phosphorus (P) potassium (K) contents (Chl) considerably reduced stressed compared with control both Nonetheless, lipid peroxidation (MDA), electrolyte leakage (EL), hydrogen peroxide (H2O2) superoxide (O2●−) elevated signals Drought-stressed showed an increase accumulation, compounds up-regulation catalase (CAT) dismutase (SOD) activity to mitigate effects. Si increased yield, sucrose%, Chl RWC, MDA EL were remarkably reduced. The treatments led adjust CAT SOD We concluded application improve resistance by regulating proline, enzymes, improving Nitrogen, Phosphorus Potassium (NPK) parameters.

Language: Английский

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Proline Alleviates Abiotic Stress Induced Oxidative Stress in Plants

Journal of Plant Growth Regulation, Journal Year: 2022, Volume and Issue: 42(8), P. 4629 - 4651

Published: Oct. 23, 2022

Language: Английский

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Halotolerant Rhizobacteria for Salinity-Stress Mitigation: Diversity, Mechanisms and Molecular Approaches

Sustainability, Journal Year: 2022, Volume and Issue: 14(1), P. 490 - 490

Published: Jan. 3, 2022

Agriculture is the best foundation for human livelihoods, and, in this respect, crop production has been forced to adopt sustainable farming practices. However, soil salinity severely affects growth, degradation of quality, and fertility many countries world. This results loss profitability, growth agricultural yields, step-by-step decline nutrient content. Thus, researchers have focused on searching halotolerant plant growth-promoting bacteria (PGPB) increase productivity. The beneficial are frequently connected with rhizosphere can alleviate under stress through direct or indirect mechanisms. In context, PGPB attained a unique position. responses include an increased rate photosynthesis, high antioxidants, osmolyte accumulation, decreased Na+ ions, maintenance water balance, germination rate, well-developed root shoot elongation salt-stress conditions. Therefore, use as bioformulations emerging research avenue last few years, applications biopesticides biofertilizers being considered alternative tools agriculture, they ecofriendly minimize all kinds stresses. Halotolerant possess greater potential salinity-affected bioinoculants bioremediation salt-affected soil.

Language: Английский

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Alleviation of drought and salt stress in vegetables: crop responses and mitigation strategies

Plant Growth Regulation, Journal Year: 2022, Volume and Issue: 99(2), P. 177 - 194

Published: Oct. 25, 2022

Abstract In recent decades, the demand for vegetables has increased significantly due to blooming global population. Climate change affected vegetable production by increasing frequencies and severity of abiotic biotic stresses. Among stresses, drought salinity are major issues that possess severe threats on production. Many (e.g., carrot, tomato, okra, pea, eggplant, lettuce, potato) usually sensitive salt stress. The defence mechanisms plants against stress have been extensively studied in model plant species field crops. Better understanding susceptibility stresses will help towards development more tolerant genotypes as a long-term strategy these However, intensity challenges also warrants immediate approaches mitigate enhance short term. Therefore, this review enlightens updated knowledge responses (physiological molecular) potentially effective strategies Moreover, we summarized different technologies such seed priming, genetic transformation, biostimulants, nanotechnology, cultural practices adopted under We propose conventional breeding, engineering, crop management should be combined generate resistance cultivars adopt smart cultivation sustainable changing climate.

Language: Английский

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