Biostimulants on Crops: Their Impact under Abiotic Stress Conditions

Horticulturae, Journal Year: 2022, Volume and Issue: 8(3), P. 189 - 189

Published: Feb. 22, 2022

Biostimulants are agronomic tools that have been gaining importance in the reduction of fertilizer applications. They can improve yield cropping systems or preventing crop losses under abiotic stresses. be composed organic and inorganic materials most components still unknown. The characterization molecular mechanism action biostimulants obtained using omics approach, which includes determination transcriptomic, proteomic, metabolomic changes treated plants. This review reports an overview biostimulants, taking stock on recent studies contributing to clarify their mechanisms. provide overall evaluation a crop’s response, connecting with physiological pathways activated performance without stress conditions. multiple responses plants must correlated phenotype changes. In this context, it is also crucial design adequate experimental plan statistical data analysis, order find robust correlations between biostimulant treatments performance.

Language: Английский

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Multi-sensor spectral synergies for crop stress detection and monitoring in the optical domain: A review

Remote Sensing of Environment, Journal Year: 2022, Volume and Issue: 280, P. 113198 - 113198

Published: Aug. 4, 2022

Remote detection and monitoring of the vegetation responses to stress became relevant for sustainable agriculture. Ongoing developments in optical remote sensing technologies have provided tools increase our understanding stress-related physiological processes. Therefore, this study aimed provide an overview main spectral retrieval approaches detecting crop Firstly, we present integrated views on: i) biotic abiotic factors, phases stress, respective plant responses, ii) affected traits, appropriate domains corresponding methods measuring traits remotely. Secondly, representative results a systematic literature analysis are highlighted, identifying current status possible future trends monitoring. Distinct occurring under short-term, medium-term or severe chronic exposure can be captured with due specific light interaction processes, such as absorption scattering manifested reflected radiance, i.e. visible (VIS), near infrared (NIR), shortwave infrared, emitted solar-induced fluorescence thermal (TIR). From 96 research papers, following observed: increasing usage satellite unmanned aerial vehicle data parallel shift from simpler parametric towards more advanced physically-based hybrid models. Most designs were largely driven by sensor availability practical economic reasons, leading common VIS-NIR-TIR combinations. The majority reviewed studies compared proxies calculated single-source rather than using synergistic way. We identified new ways forward guidance improved detection: (1) combined acquisition multiple sensors analysing simultaneously (holistic view); (2) simultaneous combining multi-domain radiative transfer models machine learning methods; (3) assimilation estimated distinct into growth As outlook, recommend streams model schemes build up Digital Twins agroecosystems, which may most efficient way detect diversity environmental stresses thus enable management decisions.

Language: Английский

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Effect of Drought Stress on Chlorophyll Fluorescence Parameters, Phytochemical Contents, and Antioxidant Activities in Lettuce Seedlings

Horticulturae, Journal Year: 2021, Volume and Issue: 7(8), P. 238 - 238

Published: Aug. 10, 2021

This study monitored changes in chlorophyll fluorescence (CF), growth parameters, soil moisture content, phytochemical content (proline, ascorbic acid, chlorophyll, total phenol (TPC), and flavonoid (TFC)), antioxidant activities 12-day-old lettuce (Lactuca sativa L.) seedlings grown under drought stress (no irrigation) control (well irrigated) treatments controlled conditions for eight days. Measurements occurred at two-day intervals. Among ten CF parameters studied, effective quantum yield of photochemical energy conversion PSII (Y(PSII)), coefficient quenching (qP), variable based on the lake model (qL) significantly decreased drought-stressed from day 6 treatment compared to control. In contrast, maximum (Fv/Fm), ratio (Rfd), non-regulated dissipation (Y(NO)) were affected only end. All Proline started increasing 4 showed ~660-fold elevation 8 Chlorophyll, TPC, TFC, seedlings. Results major all prolonged stress. These findings clarify effects during progressive exposure will be useful seedling industry.

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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Effect of sodium alginate-based superabsorbent hydrogel on tomato growth under different water deficit conditions

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 253, P. 127229 - 127229

Published: Oct. 5, 2023

Language: Английский

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A Biostimulant Based on Seaweed (Ascophyllum nodosum and Laminaria digitata) and Yeast Extracts Mitigates Water Stress Effects on Tomato (Solanum lycopersicum L.)

Agriculture, Journal Year: 2021, Volume and Issue: 11(6), P. 557 - 557

Published: June 17, 2021

Water deficit is one of the most problematic stressors worldwide. In this context, use biostimulants represents an increasingly ecological practice aimed to improve crop tolerance and mitigate negative effects on productivity. Here, effect derived from foliar application ERANTHIS®®, a biostimulant based seaweed (Ascophyllum nodosum Laminaria digitata) yeast extracts, was tested tomato plants grown under mild water-stress conditions. The potential stress mitigation action evaluated by monitoring morphometric (fresh weight dry matter content), physiological (stem water potential) biochemical (ROS scavenger enzymes activity, proline, abscisic acid, hydrogen peroxide photosynthetic pigment content) parameters closely related occurrence response at both flowering fruit-set timing. general, we observed that drought conditions treated with had lower amount ABA, MDA proline correlated activity ROS compared untreated plants. These data, together higher stem levels recorded for plants, suggest ERANTHIS®® may tomato.

Language: Английский

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Influence of Glycine Betaine (Natural and Synthetic) on Growth, Metabolism and Yield Production of Drought-Stressed Maize (Zea mays L.) Plants

Plants, Journal Year: 2021, Volume and Issue: 10(11), P. 2540 - 2540

Published: Nov. 22, 2021

A study was carried out to evaluate the effectiveness of sugar beet extract (SBE) and glycine betaine (GB) in mitigating adverse effects drought stress on two maize cultivars. Seeds (caryopses) cultivars, Sadaf (drought-tolerant) Sultan (drought-sensitive) were sown plastic pots. Plants subjected different (100%, 75% 60% field capacity (FC)) water regimes. Then, levels SBE (3% 4%) GB (3.65 3.84 g/L) applied as a foliar spray after 30 days deficit stress. Drought significantly decreased plant growth yield attributes, chlorophyll pigments, while it increased relative membrane permeability (RMP), osmolytes (GB proline), malondialdehyde (MDA), total phenolics ascorbic acid well activities superoxide dismutase (SOD) peroxidase (POD) enzymes both Exogenous application via with SBR or improved osmolyte concentration, phenolics, reactive oxygen species (ROS) scavenging (SOD, POD catalase; CAT), but reduced leaf RMP MDA concentration. The results obtained this exhibit role foliar-applied biostimulants (natural synthetic compounds) enhancing cultivars by upregulating oxidative defense system osmoprotectant accumulation under conditions.

Language: Английский

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What Do We Know about Water Scarcity in Semi-Arid Zones? A Global Analysis and Research Trends

Water, Journal Year: 2022, Volume and Issue: 14(17), P. 2685 - 2685

Published: Aug. 30, 2022

Water supply is strategic for the development of society. The water distribution in nature follows patterns linked to geographic and territorial issues. Climate fluctuations aggravate shortage problems semi-arid regions. This study aims develop a systematic review research on scarcity areas through bibliometric methods that allow analysis its structure, performance, evolution, future trends. methodology considers three phases: (i) literature review, (ii) data cleaning processing, (iii) field intellectual structure zones covers 2206 documents with collaboration sixty-one countries, distributed studies carried out 54 years (1967 2021). has been growing, especially since 21st century (93.1% documents). countries issue most are those high population rates large consumption patterns, such as United States China. There two central interest led by terms "water scarcity" stress" due intensive use resource agriculture management water–energy–climate nexus. Thus, significant journals studied relate remote sensing management, cited related agriculture. made it possible consider topics anthropogenic effects climate change, accuracy applicability models, trends conventional unconventional resources.

Language: Английский

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The Contrivance of Plant Growth Promoting Microbes to Mitigate Climate Change Impact in Agriculture

Microorganisms, Journal Year: 2021, Volume and Issue: 9(9), P. 1841 - 1841

Published: Aug. 30, 2021

Combating the consequences of climate change is extremely important and critical in context feeding world’s population. Crop simulation models have been extensively studied recently to investigate impact on agricultural productivity food security. Drought salinity are major environmental stresses that cause changes physiological, biochemical, molecular processes plants, resulting significant crop losses. Excessive use chemicals has become a severe threat human health environment. The beneficial microorganisms an environmentally friendly method increasing yield under stress conditions. These microbes enhance plant growth through various mechanisms such as production hormones, ACC deaminase, VOCs EPS, modulate hormone synthesis other metabolites plants. This review aims decipher effect promoting bacteria (PGPB) abiotic soil associated with global (viz., drought salinity). application stress-resistant PGPB may not only help combating effects stressors, but also lead mitigation change. More thorough level studies needed future assess their cumulative influence development.

Language: Английский

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Toward impact-based monitoring of drought and its cascading hazards

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(8), P. 582 - 595

Published: Aug. 1, 2023

Language: Английский

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