Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

Antioxidants, Journal Year: 2021, Volume and Issue: 10(2), P. 277 - 277

Published: Feb. 11, 2021

Climate change is an invisible, silent killer with calamitous effects on living organisms. As the sessile organism, plants experience a diverse array of abiotic stresses during ontogenesis. The relentless climatic changes amplify intensity and duration stresses, making dwindle to survive. Plants convert 1-2% consumed oxygen into reactive species (ROS), in particular, singlet (1O2), superoxide radical (O2•-), hydrogen peroxide (H2O2), hydroxyl (•OH), etc. as byproduct aerobic metabolism different cell organelles such chloroplast, mitochondria, regulatory network comprising enzymatic non-enzymatic antioxidant systems tends keep magnitude ROS within plant cells non-damaging level. However, under stress conditions, production rate increases exponentially, exceeding potential scavengers instigating oxidative burst, which affects biomolecules disturbs cellular redox homeostasis. are similar double-edged sword; and, when present below threshold level, mediate signaling pathways that actuate growth, development, acclimatization against stresses. displays both detrimental beneficial effects. exact mediated alleviation yet be fully elucidated. Therefore, review deposits information about status known sites production, mechanisms/pathways, effects, management stress. In addition, role played by advancement modern techniques molecular priming, biology, phenomics, crop modeling preventing stress, well diverting has been canvassed.

Language: Английский

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Can biostimulants be used to mitigate the effect of anthropogenic climate change on agriculture? It is time to respond

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 751, P. 141763 - 141763

Published: Aug. 21, 2020

Language: Английский

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Halo-tolerant plant growth promoting rhizobacteria for improving productivity and remediation of saline soils

Journal of Advanced Research, Journal Year: 2020, Volume and Issue: 26, P. 69 - 82

Published: July 11, 2020

The collective impact of climate change and soil salinity is continuously increasing the degraded lands across globe, bringing agricultural productivity food security under stress. high concentration salts in saline soils impose osmotic, ionic, oxidative water stress plants. Biological solutions can be most reliable sustainable approach to ensure limit use agro-chemicals.Halo-tolerant plant growth promoting rhizobacteria (HT-PGPR) are emerging as efficient biological tools mitigate toxic effects salt concentrations improve plants, simultaneously remediating soils. review explains role HT-PGPR mitigating plants through diverse mechanisms concurrently leading improvement quality.HT-PGPR involved alleviating a number evoking multipronged physiological, biochemical molecular responses. These include changes expression defense-related proteins, exopolysaccharides synthesis, activation antioxidant machinery, accumulation osmolytes, maintaining Na+ kinetics improving levels phytohormones nutrient uptake modification signaling by inoculation conditions elicits induced systemic resistance which further prepares them against microbial-mechanisms structural compositional improvements also important. Development novel bioinoculants for based on concepts presented affected agro-ecosystems them.

Language: Английский

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Bacterial Plant Biostimulants: A Sustainable Way towards Improving Growth, Productivity, and Health of Crops

Sustainability, Journal Year: 2021, Volume and Issue: 13(5), P. 2856 - 2856

Published: March 6, 2021

This review presents a comprehensive and systematic study of the field bacterial plant biostimulants considers fundamental innovative principles underlying this technology. Plant are an important tool for modern agriculture as part integrated crop management (ICM) system, helping make more sustainable resilient. contain substance(s) and/or microorganisms whose function when applied to plants or rhizosphere is stimulate natural processes enhance nutrient uptake, use efficiency, tolerance abiotic stress, biocontrol, quality. The has gained substantial significant heed worldwide environmentally friendly alternative agricultural production. At present, there increasing curiosity in industry researchers about microbial biostimulants, especially (BPBs), improve growth productivity. BPBs that based on PGPR (plant growth-promoting rhizobacteria) play plausible roles promote/stimulate through several mechanisms include (i) acquisition by nitrogen (N2) fixation solubilization insoluble minerals (P, K, Zn), organic acids siderophores; (ii) antimicrobial metabolites various lytic enzymes; (iii) action regulators stress-responsive/induced phytohormones; (iv) ameliorating stress such drought, high soil salinity, extreme temperatures, oxidative heavy metals using different modes action; (v) defense induction modes. Presented here brief emphasizing applicability exertion fulfill current food crisis.

Language: Английский

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Algae biostimulants: A critical look at microalgal biostimulants for sustainable agricultural practices

Biotechnology Advances, Journal Year: 2021, Volume and Issue: 49, P. 107754 - 107754

Published: April 21, 2021

Language: Английский

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The Use of Microalgae and Cyanobacteria in the Improvement of Agricultural Practices: A Review on Their Biofertilising, Biostimulating and Biopesticide Roles

Applied Sciences, Journal Year: 2021, Volume and Issue: 11(2), P. 871 - 871

Published: Jan. 19, 2021

The increase in worldwide population observed the last decades has contributed to an increased demand for food supplies, which can only be attained through improvement agricultural productivities. Moreover, practices should become more sustainable, as use of chemically-based fertilisers, pesticides and growth stimulants pose serious environmental problems lead scarcity finite resources, such phosphorus potassium, thus increasing fertilisers’ costs. One possible alternative development a sustainable highly effective agriculture is biologically-based compounds with known activity crops’ nutrition, protection stimulation. Among these products, microalgal cyanobacterial biomass (or their extracts) are gaining particular attention, due undeniable potential source essential nutrients metabolites different bioactivities, significantly improve yields. This manuscript highlights microalgae cyanobacteria practices, presenting: (i) how photosynthetic microorganisms interact higher plants; (ii) main bioactive that isolated from cyanobacteria; (iii) influence plants’ at levels (nutrition, stimulation).

Language: Английский

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Toward a Sustainable Agriculture Through Plant Biostimulants: From Experimental Data to Practical Applications

Agronomy, Journal Year: 2020, Volume and Issue: 10(10), P. 1461 - 1461

Published: Sept. 24, 2020

Modern agriculture increasingly demands an alternative to synthetic chemicals (fertilizers and pesticides) in order respond the changes international law regulations, but also consumers’ needs for food without potentially toxic residues. Microbial (arbuscular mycorrhizal plant growth promoting rhizobacteria: Azotobacter, Azospirillum Rizhobium spp.) non-microbial (humic substances, silicon, animal- vegetal-based protein hydrolysate macro- micro-algal extracts) biostimulants represent a sustainable effective or complement their counterparts, bringing benefits environment, biodiversity, human health economy. The Special Issue “Toward through biostimulants: from experimental data practical applications” compiles 34 original research articles, 4 review papers 1 brief report covering implications of microbial improving seedling crop performance, nutrient use efficiency quality produce as well enhancing tolerance/resistance wide range abiotic stresses particular salinity, drought, deficiency high temperature. present compilation standard scientific on principles practices will foster knowledge transfer among researchers, fertilizer biostimulant industries, stakeholders, extension specialists farmers, it enable better understanding physiological molecular mechanisms application procedure different cropping systems.

Language: Английский

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Plant Metabolomics: An Overview of the Role of Primary and Secondary Metabolites against Different Environmental Stress Factors

Life, Journal Year: 2023, Volume and Issue: 13(3), P. 706 - 706

Published: March 6, 2023

Several environmental stresses, including biotic and abiotic factors, adversely affect the growth development of crops, thereby lowering their yield. However, e.g., drought, salinity, cold, heat, ultraviolet radiations (UVr), reactive oxygen species (ROS), trace metals (TM), soil pH, are extremely destructive decrease crop yield worldwide. It is expected that more than 50% production losses due to stresses. Moreover, these factors responsible for physiological biochemical changes in plants. The response different plant such stresses a complex phenomenon with individual features several species. In addition, it has been shown stimulate multi-gene responses by making modifications accumulation primary secondary metabolites. Metabolomics promising way interpret stress tolerance study metabolic profiling revealed types metabolites, amino acids, carbohydrates, phenols, polyamines, terpenes, etc, which accumulated Among all, as lipids glycine betaine, considered major contributing work osmolytes osmoprotectants plants from various factors. contrast, plant-derived phenolics, terpenoids, nitrogen-containing compounds (alkaloids), have no direct role Nevertheless, metabolites could play significant defense protecting herbivores, insects, pathogens. they can enhance resistance against Therefore, metabolomics practices becoming essential influential identifying phytochemicals part acclimation stimuli. Hence, an accurate metabolome analysis important understand basics physiology biochemistry. This review provides insight into current information related impact on variations sets metabolite levels explores how help

Language: Английский

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Biostimulants for the Regulation of Reactive Oxygen Species Metabolism in Plants under Abiotic Stress

Cells, Journal Year: 2021, Volume and Issue: 10(10), P. 2537 - 2537

Published: Sept. 25, 2021

Global food security for a growing population with finite resources is often challenged by multiple, simultaneously occurring on-farm abiotic stresses (i.e., drought, salinity, low and high temperature, waterlogging, metal toxicity, etc.) due to climatic uncertainties variability. Breeding multiple stress tolerance long-term solution, though developing multiple-stress-tolerant crop varieties still challenge. Generation of reactive oxygen species in plant cells common response under diverse which play dual role signaling molecules or damaging agents depending on concentration. Thus, delicate balance generation may improve health, depends the natural antioxidant defense system plants. Biostimulants represent promising type environment-friendly formulation based products that are frequently used exogenously enhance tolerance. In this review, we illustrate potential biostimulants activity major plants conditions their other roles management stresses. have overcome oxidative stress, wider applicability tightly regulated dose, growth stage, variety biostimulants. However, these limitations can be understanding biostimulants’ interaction ROS

Language: Английский

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Treatment of Sweet Pepper with Stress Tolerance-Inducing Compounds Alleviates Salinity Stress Oxidative Damage by Mediating the Physio-Biochemical Activities and Antioxidant Systems

Agronomy, Journal Year: 2019, Volume and Issue: 10(1), P. 26 - 26

Published: Dec. 23, 2019

Salinity stress occurs due to the accumulation of high levels salts in soil, which ultimately leads impairment plant growth and crop loss. Stress tolerance-inducing compounds have a remarkable ability improve minimize effects salinity without negatively affecting environment by controlling physiological molecular activities plants. Two pot experiments were carried out 2017 2018 study influence salicylic acid (1 mM), yeast extract (6 g L−1), proline (10 mM) on biochemical parameters sweet pepper plants under saline conditions (2000 4000 ppm). The results showed that salt led decreasing chlorophyll content, relative water fruit yields, whereas electrolyte leakage, malondialdehyde (MDA), concentration, reactive oxygen species (ROS), antioxidant enzymes increased salt-stressed application markedly improved characteristics yields compared with untreated stressed A significant reduction MDA, ROS was also recorded for all treatments. In conclusion, our reveal important role proline, SA, extracts enhancing tolerance via modulation antioxidants machinery. Interestingly, proved be best treatment.

Language: Английский

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