Differential behavior of the antioxidant system in response to salinity induced oxidative stress in salt-tolerant and salt-sensitive cultivars of Brassica juncea L.

Kumar, Mukesh; Kumar, Rakesh; Jain, Veena; Jain, Sunita

doi:10.1016/j.bcab.2017.11.003

Cited by 33 publications

(17 citation statements)

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“…The effect of salinity on the ASC or GSH pool is dependent of the plant species. For example, in maize seedling, Brassica juncea or Phaseolus vulgaris plants salt stress brought about an increase in leaf ASC [5,6,51], similar to the response that we observed in onion leaves. However, in tobacco, no changes was observed in leaf apoplastic or symplastic ASC levels after treatment with 250 mM NaCl for 6 days [33].…”

Section: Discussionsupporting

confidence: 84%

The Apoplastic and Symplastic Antioxidant System in Onion: Response to Long-Term Salt Stress

et al. 2020

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The response of apoplastic antioxidant systems in root and leaf tissues from two onion genotypes (‘Texas 502’, salt-sensitive and ‘Granex 429’, salt-resistant) in response to salinity was studied. Electrolyte leakage data indicated the membrane integrity impairing by the effect of salts, especially in ‘Texas 502’. We detected superoxide dismutase (SOD) and peroxidase (POX) activity in the root and leaf apoplastic fractions from onion plants. Salinity increased SOD activity in the root symplast of ‘Texas 502’ and in ‘Granex 429’ leaves. In contrast, salinity reduced SOD activity in the leaf and root apoplastic fractions from ‘Texas 502’. In ‘Granex 429’, salt-stress increased leaf apoplastic POX activity and symplastic catalase (CAT) activity of both organs, but a decline in root apoplastic POX from ‘Texas 502’ took place. Salt-stress increased monodehydroascorbate reductase (MDHAR) in root and leaf symplast and in root glutathione reductase GR, mainly in ‘Granex 429’, but only in this genotype, leaf dehydroascorbate reductase (DHAR) activity increased. In contrast, a decline in leaf GR was produced only in ‘Texas 502’. Salinity increased leaf ASC levels, and no accumulation of dehydroascorbate (DHA) was observed in roots in both cases. These responses increased the redox state of ascorbate, especially in roots. In contrast, salinity declined reduced glutathione (GSH), but oxidised glutathione (GSSG) was accumulated in leaves, decreasing the redox state of glutathione. Salinity slightly increased root GSH concentration in the salt-tolerant genotype and was unchanged in the salt-sensitive genotype, but no accumulation of GSSG was produced, favoring the rise and/or maintenance of the redox state of the glutathione. These results suggest that the lower sensitivity to salt in ‘Granex 429’ could be related to a better performance of the antioxidant machinery under salinity conditions.

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Section: Discussionsupporting

confidence: 84%

The Apoplastic and Symplastic Antioxidant System in Onion: Response to Long-Term Salt Stress

et al. 2020

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“…Previously, Abogadallah et al [51] reported that APX-GR is the main H 2 O 2 detoxifier that maintains ROS balancing in barnyard grass under salt stress. Recently, it has been shown that APX, CAT, GR and SOD antioxidant activities boosted protection against oxidative stress [52,53]. The elevated levels of GR activity could increase the GSH/GSSG ratio, which is required for ascorbate regeneration and the activation of several CO 2 fixing enzymes in the chloroplasts [54], ensuring NADP + 's availability to accept electrons from the photosynthetic electron transport chain.…”

Section: Discussionmentioning

confidence: 99%

β-Aminobutyric Acid Pretreatment Confers Salt Stress Tolerance in Brassica napus L. by Modulating Reactive Oxygen Species Metabolism and Methylglyoxal Detoxification

Mahmud

Hasanuzzaman

Khan

et al. 2020

Plants

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Salinity is a serious environmental hazard which limits world agricultural production by adversely affecting plant physiology and biochemistry. Hence, increased tolerance against salt stress is very important. In this study, we explored the function of β-aminobutyric acid (BABA) in enhancing salt stress tolerance in rapeseed (Brassica napus L.). After pretreatment with BABA, seedlings were exposed to NaCl (100 and 150 mM) for 2 days. Salt stress increased Na content and decreased K content in shoot and root. It disrupted the antioxidant defense system by producing reactive oxygen species (ROS; H2O2 and O2•−), methylglyoxal (MG) content and causing oxidative stress. It also reduced the growth and photosynthetic pigments of seedlings but increased proline (Pro) content. However, BABA pretreatment in salt-stressed seedlings increased ascorbate (AsA) and glutathione (GSH) contents; GSH/GSSG ratio; and the activities of ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glutathione reductase (GR), glutathione peroxidase (GPX), superoxide dismutase (SOD), catalase (CAT), glyoxalase I (Gly I), and glyoxalase II (Gly II) as well as the growth and photosynthetic pigments of plants. In addition, compared to salt stress alone, BABA increased Pro content, reduced the H2O2, MDA and MG contents, and decreased Na content in root and increased K content in shoot and root of rapeseed seedlings. Our findings suggest that BABA plays a double role in rapeseed seedlings by reducing Na uptake and enhancing stress tolerance through upregulating the antioxidant defense and glyoxalase systems.

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“…The catalase enzyme has amain auxiliary function in the ascorbato-glutathione cycle, acting toward the detoxification caused by the hydrogen peroxide, in the cells of the plants (Sheikh-Mohamadi et al, 2018). Catalase activity increases according to the amount of hydrogen peroxide within the cells (Kumar et al, 2018). The values observed in this current study were low because sugarcane is a C4 plant possessing minimum photorespiratory ability; contrastingly C3 plants are more involved in the removal of hydrogen peroxide (Tolbert et al, 1969).…”

Section: Resultsmentioning

confidence: 58%

Agro-biochemical Traits of Sugarcane Varieties Grown in the Brazilian Semi Arid Region

Leal¹,

Rocha²,

Oliveria³

et al. 2019

JAS

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The objective of this research was to evaluate the productive response associate to biochemical indicators and oxidative enzymes activities involved in the water deficit resistance in eight sugarcane varieties (RB951541, RB931011, RB962962, RB867515, RB763710, RB72454, RB863129, and RB92579) grown in the semi-arid regions of Brazil. Compared to all other varieties, RB763710 was superior in the number of stems m-1, mean height, and stem diameter, production of whole plant fresh biomass and stem. When biochemical responses were obtained, all sugarcane varieties had a statistically similar solubility and maturity, regardless of the specific maturity rate of each cultivar. The increase in soluble carbohydrate levels occurred in the most stress-sensitive varieties and the variety RB763710 had the highest proline content. A lower general correlation was observed between the production of fresh biomass of stalks and the enzymatic activity. Among the varieties, RB763710 had the highest enzymatic activities which possibly provided greater tolerance to water stress due to the ability to maintain the redox state in the leaves of plants under water deficit. The study of the adaptation mechanisms of sugarcane against water deficit has contributed to the development and diffusion of genotypes tolerant to rainfed conditions, thus contributing to increased productivity even under adverse conditions, allowing maintenance and optimization of the production chains of sugarcane in rainfed regions.

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Differential behavior of the antioxidant system in response to salinity induced oxidative stress in salt-tolerant and salt-sensitive cultivars of Brassica juncea L.

Cited by 33 publications

References 50 publications

The Apoplastic and Symplastic Antioxidant System in Onion: Response to Long-Term Salt Stress

The Apoplastic and Symplastic Antioxidant System in Onion: Response to Long-Term Salt Stress

β-Aminobutyric Acid Pretreatment Confers Salt Stress Tolerance in Brassica napus L. by Modulating Reactive Oxygen Species Metabolism and Methylglyoxal Detoxification

Agro-biochemical Traits of Sugarcane Varieties Grown in the Brazilian Semi Arid Region

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