Transcriptional and metabolomic analysis of Ascophyllum nodosum mediated freezing tolerance in Arabidopsis thaliana

Nair, P. Deepa S.; Kandasamy, Saveetha; Zhang, Junzeng; Ji, Xiuhong; Kirby, Christopher W.; Benkel, Bernhard F.; Hodges, Mark D; Critchley, Alan T.; Hiltz, David; Prithiviraj, Balakrishnan

doi:10.1186/1471-2164-13-643

Cited by 116 publications

(85 citation statements)

References 81 publications

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“…In the literature some studies report that after the application of biostimulants expression of genes related to defense mechanism is upregulated. The treatment of A. thaliana plants exposed to freezing stresses with algae extract result in changes of expression in about 5% (1113) of all A. thaliana genes (Nair et al, 2012). About 2% (463 genes) of the differentially expressed genes are upregulated and 3% (650 genes) downregulated.…”

Section: Discussionmentioning

confidence: 99%

“…About 2% (463 genes) of the differentially expressed genes are upregulated and 3% (650 genes) downregulated. The authors report that some of these genes were involved in the plant's defense mechanisms (Nair et al, 2012). The application of algal extracts prior to pathogen infection in alfalfa cause upregulation of 152 genes, mostly plant defense genes, such as those involved in phytoalexin, PR proteins, cell wall proteins, and oxylipin pathways (Cluzet et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

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Biological mode of action of a nitrophenolates-based biostimulant: case study

2014

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The challenges facing modern plant production involve (i) responding to the demand for food and resources of plant origin from the world's rapidly growing population, (ii) coping with the negative impact of stressful conditions mainly due to anthropopressure, and (iii) meeting consumers' new requirements and preferences for food that is high in nutritive value, natural, and free from harmful chemical additives. Despite employing the most modern plant cultivation technologies and the progress that has been made in breeding programs, the genetically-determined crop potential is still far from being fully exploited. Consequently yield and quality are often reduced, making production less, both profitable and attractive. There is an increasing desire to reduce the chemical input in agriculture and there has been a change toward integrated plant management and sustainable, environmentally-friendly systems. Biostimulants are a category of relatively new products of diverse formulations that positively affect a plant's vital processes and whose impact is usually more evident under stressful conditions. In this paper, information is provided on the mode of action of a nitrophenolates-based biostimulant, Atonik, in model species and economically important crops grown under both field and controlled conditions in a growth chamber. The effects of Atonik on plant morphology, physiology, biochemistry (crops and model plant) and yield and yield parameters (crops) is demonstrated. Effects of other biostimulants on studied in this work processes/parameters are also presented in discussion.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Biological mode of action of a nitrophenolates-based biostimulant: case study

2014

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“…showed that extracts of A. nodosum and its lipophilic fraction increased tolerance of Arabidopsis to freezing temperatures and that this was associated with protection of membrane integrity, reduced expression of chlorophyllase genes, and increased expression of three cold tolerance genes. (Nair et al 2012) determined that the lipophilic components (LPC) of the seaweed extract increased proline content in Arabidopsis plants undergoing freezing stress and that this increase was associated with increased expression of proline synthesis genes. In addition, the concentration of total soluble sugars in the cytosol and the proportion of unsaturated fatty acids increased in LPC-treated plants under freezing stress.…”

Section: Plant Metabolism and Physiologymentioning

confidence: 99%

“…Their modes of action are not yet well understood, but the application of new analytical and molecular tools is providing new insight into their effects on gene expression, biochemical pathways, and physiological processes Nair et al 2012;Jannin et al 2013;Wally et al 2013). Greater understanding of the modes of action of this renewable resource will be helpful in optimizing its use in the sustainable management of agricultural and horticultural systems (Khan et al 2009;Quilty and Cattle 2011).…”

Section: Concluding Remarks For Seaweed Extractsmentioning

confidence: 99%

Agricultural uses of plant biostimulants

2014

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Background Plant biostimulants are diverse substances and microorganisms used to enhance plant growth. The global market for biostimulants is projected to increase 12 % per year and reach over $2,200 million by 2018. Despite the growing use of biostimulants in agriculture, many in the scientific community consider biostimulants to be lacking peer-reviewed scientific evaluation. Scope This article describes the emerging definitions of biostimulants and reviews the literature on five categories of biostimulants: i. microbial inoculants, ii. humic acids, iii. fulvic acids, iv. protein hydrolysates and amino acids, and v. seaweed extracts.Conclusions The large number of publications cited for each category of biostimulants demonstrates that there is growing scientific evidence supporting the use of biostimulants as agricultural inputs on diverse plant species. The cited literature also reveals some commonalities in plant responses to different biostimulants, such as increased root growth, enhanced nutrient uptake, and stress tolerance.

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“…The lipophilic components were found to be rich in fatty acids such as butyric acid, palmitic acid, oleic acid, linoleic acid the sterol fucosterol. These extracts increased proline content and total soluble sugars, contributing to freezing tolerance [56]. A. nodosum extracts have even been used to reduce cold stress sensitivity in Kappaphycus alvarezii.…”

Section: Algal Extractsmentioning

confidence: 99%

The role of biostimulants and bioeffectors as alleviators of abiotic stress in crop plants

Oosten

Pepe

Pascale

et al. 2017

Chem. Biol. Technol. Agric.

622

399

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The use of bioeffectors, formally known as plant biostimulants, has become common practice in agriculture and provides a number of benefits in stimulating growth and protecting against stress. A biostimulant is loosely defined as an organic material and/or microorganism that is applied to enhance nutrient uptake, stimulate growth, enhance stress tolerance or crop quality. This review is intended to provide a broad overview of known effects of biostimulants and their ability to improve tolerance to abiotic stresses. Inoculation or application of extracts from algae or other plants have beneficial effects on growth and stress adaptation. Algal extracts, protein hydrolysates, humic and fulvic acids, and other compounded mixtures have properties beyond basic nutrition, often enhancing growth and stress tolerance. Non-pathogenic bacteria capable of colonizing roots and the rhizosphere also have a number of positive effects. These effects include higher yield, enhanced nutrient uptake and utilization, increased photosynthetic activity, and resistance to both biotic and abiotic stresses. While most biostimulants have numerous and diverse effects on plant growth, this review focuses on the bioprotective effects against abiotic stress. Agricultural biostimulants may contribute to make agriculture more sustainable and resilient and offer an alternative to synthetic protectants which have increasingly falling out of favour with consumers. An extensive review of the literature shows a clear role for a diverse number of biostimulants that have protective effects against abiotic stress but also reveals the urgent need to address the underlying mechanisms responsible for these effects.

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Transcriptional and metabolomic analysis of Ascophyllum nodosum mediated freezing tolerance in Arabidopsis thaliana

Cited by 116 publications

References 81 publications

Biological mode of action of a nitrophenolates-based biostimulant: case study

Biological mode of action of a nitrophenolates-based biostimulant: case study

Agricultural uses of plant biostimulants

The role of biostimulants and bioeffectors as alleviators of abiotic stress in crop plants

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