Poly-γ-glutamic acid induces system tolerance to drought stress by promoting abscisic acid accumulation in Brassica napus L.

Xu, Zhihua; Ma, Junjie; Lei, Peng; Wang, Qian; Feng, Xiaohai; Xu, Hong

doi:10.1038/s41598-019-57190-4

Cited by 40 publications

(33 citation statements)

References 56 publications

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“…The polypeptide has promising properties, such as its biodegradability, non-toxicity, water solubility and low production cost ( Chen et al, 2005 ). Xu et al (2020) define γ-PGA as an anti-drought agent that can efficiently alleviate damage to plants under drought stress by promoting the accumulation of abscisic acid in rape ( Brassica napus L.) as well as increasing enzymatic antioxidant activity and accumulation of proline. In addition, the polymer is also effective against salt and cold stress in rape ( Lei et al, 2016 ; Xu et al, 2017 ), by enhancing proline accumulation.…”

Section: Amino Acids and Other N -Containing Compomentioning

confidence: 99%

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

et al. 2020

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Biostimulants (BSs) are probably one of the most promising alternatives nowadays to cope with yield losses caused by plant stress, which are intensified by climate change. Biostimulants comprise many different compounds with positive effects on plants, excluding pesticides and chemical fertilisers. Usually mixtures such as lixiviates from proteins or algal extracts have been used, but currently companies are interested in more specific compounds that are capable of increasing tolerance against abiotic stress. Individual application of a pure active compound offers researchers the opportunity to better standarise formulations, learn more about the plant defence process itself and assist the agrochemical industry in the development of new products. This review attempts to summarise the state of the art regarding various families of organic compounds and their mode/mechanism of action as BSs, and how they can help maximise agricultural yields under stress conditions aggravated by climate change.

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Section: Amino Acids and Other N -Containing Compomentioning

confidence: 99%

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

et al. 2020

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“…Drought stress, one of the primary abiotic stresses, causes significant losses in agricultural production and will increase in both intensity and frequency with increasing planet temperature (Elizamar et al, 2013; Xu et al, 2020). In semiarid areas, rapeseed production is often affected by drought stress (Poveda, 2020).…”

Section: Introductionmentioning

confidence: 99%

Transcriptome and proteome analyses of the molecular mechanisms underlying changes in oil storage under drought stress in Brassica napus L.

Zhang

et al. 2021

GCB Bioenergy

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Rapeseed (Brassica napus L.) is the second most important oilseed crop in edible vegetable oil and bioenergy; however, drought stress generally causes a decrease in rapeseed yield and oil content, especially during the reproductive stage. In our study, we measured the oil and protein contents and gibberellic acid (GA) and abscisic acid (ABA) levels in seeds that were acquired on the 30th, 40th, and 50th days after flowering under control and drought treatments. RNA and protein libraries were constructed from the stressed seeds to perform transcriptome and proteome analyses, respectively. Our results demonstrated that the oil content decreased due to four primary mechanisms: downregulation of fatty acid biosynthesis‐associated genes and proteins; upregulation of fatty acid degradation‐associated genes and proteins; enhancement of protein storage due to changes in the abundances of relevant genes and proteins; and upregulation of Gly‐Asp‐Ser‐Leu (GDSL) gene expression, potentially as the result of upregulating the GA biosynthesis gene GA20ox3 and downregulating the GA inactivating gene GA2ox3 and thus an increase in GA content. During seed maturation, oil storage change may also relate to increasing ABA content as the upregulation of two members of NCED6 (9‐cis‐epoxycarotenoid dioxygenase) gene family involved in ABA biosynthesis, and the upregulation of genes involved in ABA signal transduction. These results will help to establish a foundation for breeding excellent varieties of rapeseed with high oil content for areas with frequent droughts to promote the supply of edible vegetable oil and biofuel.

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“…Biofertilizer application promoted the elimination of ROS and, therefore, drops in LP values in treatments B3S and BAS. (Xu et al, 2020) also found a reduction in LP values under water stress conditions in Brassica rapa plants with the application of poly-γ-glutamic acid. This effect in the reduction of LP can be attributed to the increases in PR, and the enzymes POD and SOD, potential ROS scavengers, due to the applications of the biofertilizer.…”

Section: Discussionmentioning

confidence: 75%

Mitigation of water restriction effects on soybean with biofertilizer: metabolic and stomatal conductance changes

Marques

Cordeiro

Amatussi

et al. 2021

RSD

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The demand for soybean has increased in the international market, and water restriction is an important factor in reducing its yield. Therefore, the development of technologies aimed to reducing the damage caused by water stress becomes strategic. Thus, the objective was to demonstrate the role of the amino acid L-glutamic acid in mitigating water stress in soybean plants. A study was conducted in a greenhouse using soybean plants in vegetative stage subjected to water restriction and foliar applications of biofertilizer obtained from bacterial fermentation, containing 25% of the amino acid L-glutamic acid, sprayed three days before the imposition of water restriction and when the substrate moisture reached 50% of the water retention capacity (WRC). Stomatal resistance was determined throughout the days and three collections of plant material were carried out: at the beginning of water restriction, one and four days after rehydration for biochemical and enzymatic analyses. Plants that were supplied with biofertilizer at the beginning of water restriction showed lower stomatal resistance, while plants that received application three days before 50% WRC showed increases in sugar accumulation, in free amino acids and proline content, and in nitrate reductase and peroxidase enzymes activity, consequently, reducing lipids peroxidation, mitigating the effects of oxidative stress.

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Poly-γ-glutamic acid induces system tolerance to drought stress by promoting abscisic acid accumulation in Brassica napus L.

Cited by 40 publications

References 56 publications

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Transcriptome and proteome analyses of the molecular mechanisms underlying changes in oil storage under drought stress in Brassica napus L.

Mitigation of water restriction effects on soybean with biofertilizer: metabolic and stomatal conductance changes

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