An Ascophyllum nodosum-Derived Biostimulant Protects Model and Crop Plants from Oxidative Stress

Staykov, Nikola; Angelov, Mihail; Petrov, Veselin; Minkov, Pavel; Kanojia, Aakansha; Guinan, Kieran J.; Alseekh, Saleh; Fernie, Alisdair R.; Sujeeth, Neerakkal; Gechev, Tsanko

doi:10.3390/metabo11010024

Cited by 27 publications

(14 citation statements)

References 59 publications

(67 reference statements)

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“…Biostimulants can enhance the tolerance of plants to abiotic stresses and improve productivity and crop quality [22]. We recently demonstrated that a specific extract of A. nodosum, Super Fifty (SF), reduces paraquat-induced oxidative stress in Arabidopsis thaliana and vegetable crops [12,75]. SF is a concentrated alkaline extract of the seaweed A. nodosum, which contains a range of unique carbohydrates such as fucoidan, alginate, and laminarin, as well as proteins and minerals [14].…”

Section: Discussionmentioning

confidence: 99%

Priming with a Seaweed Extract Strongly Improves Drought Tolerance in Arabidopsis

Rasul

Gupta

Olas

et al. 2021

IJMS

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Drought represents a major threat to plants in natural ecosystems and agricultural settings. The biostimulant Super Fifty (SF), produced from the brown alga Ascophyllum nodosum, enables ecologically friendly stress mitigation. We investigated the physiological and whole-genome transcriptome responses of Arabidopsis thaliana to drought stress after a treatment with SF. SF strongly decreased drought-induced damage. Accumulation of reactive oxygen species (ROS), which typically stifle plant growth during drought, was reduced in SF-primed plants. Relative water content remained high in SF-treated plants, whilst ion leakage, a measure of cell damage, was reduced compared to controls. Plant growth requires a functional shoot apical meristem (SAM). Expression of a stress-responsive negative growth regulator, RESPONSIVE TO DESICCATION 26 (RD26), was repressed by SF treatment at the SAM, consistent with the model that SF priming maintains the function of the SAM during drought stress. Accordingly, expression of the cell cycle marker gene HISTONE H4 (HIS4) was maintained at the SAMs of SF-primed plants, revealing active cell cycle progression after SF priming during drought. In accordance with this, CYCP2;1, which promotes meristem cell division, was repressed by drought but enhanced by SF. SF also positively affected stomatal behavior to support the tolerance to drought stress. Collectively, our data show that SF priming mitigates multiple cellular processes that otherwise impair plant growth under drought stress, thereby providing a knowledge basis for future research on crops.

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Section: Discussionmentioning

confidence: 99%

Priming with a Seaweed Extract Strongly Improves Drought Tolerance in Arabidopsis

Rasul

Gupta

Olas

et al. 2021

IJMS

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“…It has been suggested that non-growth hormone components in seaweed, such as polysaccharides, may be responsible for growth enhancing effects induced by SWE [132,133]. Polysaccharides are major components of brown seaweeds [134], and recent studies show that a particular commercial Ascophyllum nodosum (Super Fifty) extract high in polysaccharides modulates a range of processes at the transcriptomic, metabolic and lipid levels [135][136][137]. The authors demonstrate that these changes involve multiple pathways and culminate in significant changes at the phenotypic level, including: tolerance to oxidative stress and abiotic stresses; reductions in Reactive Oxygen Species (ROS); reductions in electrolyte leakage and increases in plant growth.…”

Section: Seaweed Extractsmentioning

confidence: 99%

“…The accumulation of ROS at levels that incur damage is referred to as oxidative stress, which can bring irreversible damage to cellular components and can compromise plant growth and yield. Priming with a commercial extract of A. nodosum (SuperFifty) has been shown to inhibit ROS production, and protects the model plant Arabidopsis thaliana and crops, tomato and pepper, from severe oxidative stress [135,136]. Priming and foliar application with SuperFifty led to a better tolerance against drought stress in Arabidopsis thaliana, with primed plants showing better development than control plants.…”

Section: Ascophyllum Nodosummentioning

confidence: 99%

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

et al. 2021

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As the world develops and population increases, so too does the demand for higher agricultural output with lower resources. Plant biostimulants appear to be one of the more prominent sustainable solutions, given their natural origin and their potential to substitute conventional methods in agriculture. Classified based on their source rather than constitution, biostimulants such as humic substances (HS), protein hydrolysates (PHs), seaweed extracts (SWE) and microorganisms have a proven potential in improving plant growth, increasing crop production and quality, as well as ameliorating stress effects. However, the multi-molecular nature and varying composition of commercially available biostimulants presents challenges when attempting to elucidate their underlying mechanisms. While most research has focused on the broad effects of biostimulants in crops, recent studies at the molecular level have started to unravel the pathways triggered by certain products at the cellular and gene level. Understanding the molecular influences involved could lead to further refinement of these treatments. This review comprises the most recent findings regarding the use of biostimulants in plants, with particular focus on reports of their molecular influence.

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“…The lipidomic assessment conducted by this team indicated that lipids associated with oxidative stress-induced cell death and chloroplast degradation, such as triacylglycerols (TAGs), declined in the SF pretreated plants. The beneficial effect of SF priming on reducing oxidative stress symptoms was further confirmed in the two important crops tomato and pepper, which were compared to Arabidopsis ([ 165 ]; Figure 2 ). In this study, quantification of primary metabolites showed accumulation of stress metabolites in plants exposed to oxidative stress alone but not in plants treated with SF and subsequently subjected to oxidative stress.…”

Section: Seaweed Extract Induced Stress Mitigationmentioning

confidence: 81%

“…In this study, quantification of primary metabolites showed accumulation of stress metabolites in plants exposed to oxidative stress alone but not in plants treated with SF and subsequently subjected to oxidative stress. Furthermore, the metabolome analyses identified characteristic metabolite signatures induced by SF in the three investigated species ([ 165 ]; Figure 2 ).…”

Section: Seaweed Extract Induced Stress Mitigationmentioning

confidence: 99%

Current Insights into the Molecular Mode of Action of Seaweed-Based Biostimulants and the Sustainability of Seaweeds as Raw Material Resources

Sujeeth

Petrov

Guinan

et al. 2022

IJMS

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Natural biostimulants, such as seaweed extracts, can stimulate plant growth and development in both model and crop plants. Due to the increasing demands for their use in agriculture, it is crucial to ensure the sustainability of the sources from which they are produced. Furthermore, some seaweed extracts were recently shown to prime and protect from adverse environmental factors such as drought, salinity and extreme temperatures, as well as from oxidative stress. The molecular mode of action of these biostimulants has still not been fully elucidated, but there has been significant progress in this direction in the last years. Firstly, this review examines the sustainability aspects of harvesting seaweed resources as raw materials for manufacturing biostimulants and provides an overview of the regulatory landscape pertaining to seaweed-based biostimulants. The review then summarises the recent advances in determining the genetic and molecular mechanisms activated by seaweed-based biostimulants, their influence on transcriptome reconfiguration, metabolite adjustment, and ultimately stress protection, improved nutrient uptake, and plant growth and performance. This knowledge is important for deciphering the intricate stress signalling network modulated by seaweed-based biostimulants and can aid in designing molecular priming technologies for crop improvement.

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An Ascophyllum nodosum-Derived Biostimulant Protects Model and Crop Plants from Oxidative Stress

Cited by 27 publications

References 59 publications

Priming with a Seaweed Extract Strongly Improves Drought Tolerance in Arabidopsis

Priming with a Seaweed Extract Strongly Improves Drought Tolerance in Arabidopsis

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

Current Insights into the Molecular Mode of Action of Seaweed-Based Biostimulants and the Sustainability of Seaweeds as Raw Material Resources

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