Exogenously applied poly-γ-glutamic acid alleviates salt stress in wheat seedlings by modulating ion balance and the antioxidant system

Guo, Zhengfei; Yang, Na; C, Zhu; Gan, Longzhan

doi:10.1007/s11356-016-8295-4

Cited by 40 publications

(34 citation statements)

References 42 publications

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“…Besides, (Xu et al, 2017) reported that pretreatment with γ-PGA induced cross-talk between Ca 2+ , H 2 O 2 , brassinolide and jasmonic acid, resulting in the accumulation of proline and the improvement of the antioxidant machinery. On the other hand, in wheat seedlings, γ-PGA increased antioxidant defences and modulated ionic balance (Guo et al, 2017). It also protected garden cucumber (Cucumis sativus L.) seedlings against Cd and Pb toxicity (Pang et al, 2018).…”

Section: Biopolymersmentioning

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: Biopolymersmentioning

confidence: 99%

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

et al. 2020

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“…Salt stress is a major abiotic stress that seriously affects the growth and development of plants (Ryu and Cho 2015). One important feature of this stress is the induction of oxidative damage to plants by inducing the accumulation of reactive oxygen species (Guo et al 2017). Chloroplast is an important cell compartment for its function in photosynthesis.…”

Section: mentioning

confidence: 99%

Cerium nitrate improves salt tolerance of wheat seedlings by regulating the antioxidant capacity of chloroplasts

Chen¹,

Shan²

2019

Biol. plant.

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The effects of Ce(NO 3) 3 on the antioxidant capacity in the chloroplasts of salt-stressed wheat (Triticum aestivum L.) seedlings were investigated. The results showed that salt stress (40, 80, 120, or 160 mM NaCl) significantly increased the activities of ascorbate peroxidase, glutathione reductase, superoxide dismutase, catalase, and glutathione peroxidase, the content of malondialdehyde (MDA) and hydrogen peroxide (H 2 O 2), but significantly reduced the ratios of reduced ascorbate (AsA) to dehydroascorbate (DHA) and reduced glutathione to oxidizided glutathione (GSH/GSSG), the content of chlorophylls (Chls) and carotenoids, net photosynthetic rate, plant height, plant dry mass and root length compared with the control. Compared with NaCl stress alone, application of NaCl + Ce(NO 3) 3 further enhanced the activities of above mentioned enzymes, increased the ratios of AsA/DHA and GSH/GSSG, the content of Chs and carotenoids, net photosynthetic rate, plant height, plant dry mass, and root length, and significantly reduced the content of MDA and H 2 O 2 in chloroplasts. Meanwhile, Ce(NO 3) 3 alone also significantly enhanced the above mentioned indicators, but had no significant effect on the content of MDA and H 2 O 2 compared with the control. Our results suggested that Ce(NO 3) 3 up-regulated the antioxidant capacity of chloroplast, which improved the wheat salt tolerance.

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“…Prolonged stress causes oxidative stress that generates reactive oxygen species (ROS), such as O 2 · − , H 2 O 2 and hydroxyl radicals (·OH − ). The accumulation of reactive oxygen species has been reported to hamper many important biological functions, such as photosynthesis, respiration and nutrient uptake (Ahmad et al , Ahanger and Agarwal , Guo et al ), which in turn induced serious oxidative damage to plants. However, to cope with the increased ROS levels, plants have a complex antioxidant defense system that involves non‐enzymatic antioxidants, including ascorbate (AsA) and glutathione (GSH), and enzymes in the ascorbate‐glutathione (AsA‐GSH) cycle, such as ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR), which neutralize the effects of stress‐generated ROS (Holler et al , Nahar et al , Hossain et al ).…”

Section: Introductionmentioning

confidence: 99%

Low pH altered salt stress in antioxidant metabolism and nitrogen assimilation in ginger (Zingiber officinale) seedlings

Yin

Liu

Cao

et al. 2019

Physiologia Plantarum

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The effects of low pH on antioxidant metabolism and nitrogen (N) assimilation in ginger seedlings under salt stress were investigated. A two‐way randomized block design was used: the main treatment consisted of two pH levels, normal and low pH (6.0 and 4.0, respectively), and the other treatment consisted of two salinity levels, 0 and 100 mmol l−1 Na+ (NaCl and Na2SO4). The results showed that low pH decreased the malondialdehyde (MDA) and hydrogen peroxide contents of ginger seedling leaves under salt stress. Moreover, low pH and salt stress significantly decreased the contents of non‐enzymatic antioxidants, including ascorbate (AsA) and glutathione (GSH), and increased the activities of antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR). In addition, salt stress inhibited the N assimilation process in ginger seedling leaves, but low pH improved N assimilation under salt stress. Our finding was that low pH alleviated oxidative damage and promoted N assimilation under salt stress.

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Exogenously applied poly-γ-glutamic acid alleviates salt stress in wheat seedlings by modulating ion balance and the antioxidant system

Cited by 40 publications

References 42 publications

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Cerium nitrate improves salt tolerance of wheat seedlings by regulating the antioxidant capacity of chloroplasts

Low pH altered salt stress in antioxidant metabolism and nitrogen assimilation in ginger (Zingiber officinale) seedlings

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