Title: Enhanced salt tolerance and photosynthetic performance: Implication of ɤ-amino butyric acid application in salt-exposed lettuce (Lactuca sativa L.) plants

Kalhor, Maryam Seifi; Aliniaeifard, Sasan; Seif, Mehdi; Asayesh, Elahe Javadi; Bernard, Françoise; Hassani, Seyedeh Batool; Li, Tao

doi:10.1016/j.plaphy.2018.07.003

Cited by 81 publications

(44 citation statements)

References 99 publications

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“…Notably, exogenous application of GABA is known to reduce oxidative damage under abiotic stresses such as salinity, heat, hypoxia, cold and heavy metals toxicity (Li et al, ; Song, Xu, Wang, & Tao, ; Wang et al, ; Wang et al, ). The reduced oxidative damage was associated with increased activity of antioxidant enzymes such as catalase (CAT), superoxide dismutase (SOD), and the ascorbate‐glutathione cycle enzymes (Kalhor et al, ; Mahmud et al, ; Wang et al, ; Wang et al, ). Some of these authors proposed GABA‐induced signalling to explain such reprogramming of the cellular antioxidant machinery (Vijayakumari & Puthur, ; Wang et al, ).…”

Section: Gaba Impacts Plant Defence By Modulating Ros Homeostasismentioning

confidence: 99%

γ‐Aminobutyric acid and related amino acids in plant immune responses: Emerging mechanisms of action

Tarkowski

Signorelli

Höfte

2020

Plant Cell & Environment

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The entanglement between primary metabolism regulation and stress responses is a puzzling and fascinating theme in plant sciences. Among the major metabolites found in plants, γ-aminobutyric acid (GABA) fulfils important roles in connecting C and N metabolic fluxes through the GABA shunt. Activation of GABA metabolism is known since long to occur in plant tissues following biotic stresses, where GABA appears to have substantially different modes of action towards different categories of pathogens and pests. While it can harm insects thanks to its inhibitory effect on the neuronal transmission, its capacity to modulate the hypersensitive response in attacked host cells was proven to be crucial for host defences in several pathosystems. In this review, we discuss how plants can employ GABA's versatility to effectively deal with all the major biotic stressors, and how GABA can shape plant immune responses against pathogens by modulating reactive oxygen species balance in invaded plant tissues. Finally, we discuss the connections between GABA and other stress-related amino acids such as BABA (β-aminobutyric acid), glutamate and proline. K E Y W O R D SBABA, biotic stress, GABA, glutamate, hypersensitive response, primary metabolism, proline, ROS

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Section: Gaba Impacts Plant Defence By Modulating Ros Homeostasismentioning

confidence: 99%

γ‐Aminobutyric acid and related amino acids in plant immune responses: Emerging mechanisms of action

Tarkowski

Signorelli

Höfte

2020

Plant Cell & Environment

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“…Osmotic adjustment by GABA has also been reported by Renault and colleagues (2011) 43 . In our previous study we showed the positive effect of GABA on photosynthesis performance under salt stress 41 . Consistently, current study indicates an www.nature.com/scientificreports www.nature.com/scientificreports/ improved photosynthetic functionality by GABA treatment under Cd stress.…”

mentioning

confidence: 92%

“…A well-known example is GABA 34 . GABA is a four carbon non-protein amino acid found in plants in response to myriad biotic and abiotic stresses [35][36][37][38][39][40][41] . GABA accumulation has been reported as a result of exposure to different stress conditions such as high temperature 42 , osmotic pressure 19,43 , cold shock 44 , salinity stress 22 and HM toxicity 19 .…”

mentioning

confidence: 99%

“…It has been shown that exogenous GABA application can induce stress tolerance in plants. For example, significant increases of heat tolerance in creeping bentgrass (Agrostis stolonifera) 39 , cold tolerance in peach fruits (Amygdalus persica) 45 , salt tolerance in Nicotiana sylvestris 46 and Lactuca sativa 41 and drought tolerance in perennial ryegrass (Lolium perenne) 47 have been previously reported. The beneficial role of GABA against stress-induced oxidative damage in various plant species has been often reported 41,48,49 .…”

mentioning

confidence: 99%

“…For example, significant increases of heat tolerance in creeping bentgrass (Agrostis stolonifera) 39 , cold tolerance in peach fruits (Amygdalus persica) 45 , salt tolerance in Nicotiana sylvestris 46 and Lactuca sativa 41 and drought tolerance in perennial ryegrass (Lolium perenne) 47 have been previously reported. The beneficial role of GABA against stress-induced oxidative damage in various plant species has been often reported 41,48,49 . GABA has also been attributed to cytosolic pH regulation since its biosynthesis consumes protons, thereby reducing acidic conditions [50][51][52] .…”

mentioning

confidence: 99%

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γ-Aminobutyric acid confers cadmium tolerance in maize plants by concerted regulation of polyamine metabolism and antioxidant defense systems

Seifikalhor

Aliniaeifard

Bernard

et al. 2020

Sci Rep

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Gamma-Aminobutyric acid (GABA) accumulates in plants following exposure to heavy metals. to investigate the role of GABA in cadmium (cd) tolerance and elucidate the underlying mechanisms, GABA (0, 25 and 50 µM) was applied to cd-treated maize plants. Vegetative growth parameters were improved in both cd-treated and control plants due to GABA application. cd uptake and translocation were considerably inhibited by GABA. Antioxidant enzyme activity was enhanced in plants subjected to cd. concurrently GABA caused further increases in catalase and superoxide dismutase activities, which led to a significant reduction in hydrogen peroxide, superoxide anion and malondealdehyde contents under stress conditions. polyamine biosynthesis-responsive genes, namely ornithine decarboxylase and spermidine synthase, were induced by GABA in plants grown under cd shock. GABA suppressed polyamine oxidase, a gene related to polyamine catabolism, when plants were exposed to Cd. Consequently, different forms of polyamines were elevated in Cd-exposed plants following GABA application. The maximum quantum efficiency of photosystem II (F v /f m) was decreased by cd-exposed plants, but was completely restored by GABA to the same value in the control. these results suggest a multifaceted contribution of GABA, through regulation of cd uptake, production of reactive oxygen species and polyamine metabolism, in response to cd stress. Heavy metal (HM) toxicity is considered a major threat to living organisms. HM-polluted soils derived from increasing geologic and anthropogenic activities have significantly impacted the production of high-quality agricultural crops in certain regions of the world. Plants growing on these soils exhibit reduced growth, photosynthetic performance, and yield 1. As a naturally occurring HM pollutant, Cd exposure has been documented in most organisms, particularly plants and humans 2. World fertilizer consumption is increasing and will eventually reach a point where the drawbacks outweigh the benefits 3. The same mechanisms that drive improved plant productivity often create side effects such as environmental contamination. Furthermore, some components of fertilizers, especially Cd, accumulate in both body and food chain, where they remain for an extended period and causes adverse health effects 4. Therefore, fertilizers containing very high levels of Cd (417 mg/kg) threaten human health by accumulation in important crop such as maize 5. Maize, as one of the most popular cereal grain, is widely cultivated across the world. Maize is also produced at an industrial scale as a key input in various products such as syrups, soft drinks and charcoals 6,7. Therefore, there is a strong incentive to minimize the toxic effects of Cd in maize.

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Exogenous γ‐aminobutyric acid (GABA) improves the cadmium phytoremediation capacity of Solanum nigrum var. humile under cadmium stress

Li,

Zhou

et al. 2024

Env Prog and Sustain Energy

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Abstractγ‐aminobutyric acid (GABA) has shown promise in enhancing crop tolerance to heavy metal stress. To improve the cadmium (Cd) phytoremediation capacity of hyperaccumulator Solanum nigrum var. humile, the effects of exogenous GABA on the growth and Cd accumulation of S. nigrum var. humile were studied. When exposed to Cd stress (0.1 mg/L) through irrigation, S. nigrum var. humile exhibited inhibited growth, characterized by decreased biomass and contents of photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoid). However, the application of exogenous GABA at 1 and 2 g/L increased various organs biomass and photosynthetic pigment content of S. nigrum var. humile to certain degree under Cd stress. Compared with the Cd treatment, the concentrations of 1 and 2 g/L GABA increased the shoot biomass by 8.24% and 16.62%, respectively. GABA also increased the Cd contents, bioconcentration factors, and Cd extractions in various organs of S. nigrum var. humile. Compared with the Cd treatment, the concentrations of 1 and 2 g/L GABA increased the shoot Cd extraction by 17.66% and 24.47%, respectively. Moreover, correlation and gray relational analyses showed that the shoot biomass, chlorophyll b content, and total chlorophyll content were the top three parameters closely related to shoot Cd extraction. These findings suggest that GABA can alleviate Cd‐induced stress in S. nigrum var. humile, thus enhancing its phytoremediation capacity for Cd‐contaminated soils.

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Title: Enhanced salt tolerance and photosynthetic performance: Implication of ɤ-amino butyric acid application in salt-exposed lettuce (Lactuca sativa L.) plants

Cited by 81 publications

References 99 publications

γ‐Aminobutyric acid and related amino acids in plant immune responses: Emerging mechanisms of action

γ‐Aminobutyric acid and related amino acids in plant immune responses: Emerging mechanisms of action

γ-Aminobutyric acid confers cadmium tolerance in maize plants by concerted regulation of polyamine metabolism and antioxidant defense systems

Exogenous γ‐aminobutyric acid (GABA) improves the cadmium phytoremediation capacity of Solanum nigrum var. humile under cadmium stress

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