Glutathione and proline can coordinately make plants withstand the joint attack of metal(loid) and salinity stresses

Anjum, Naser A.; Aref, Ibrahim; Duarte, Armando C.; Pereira, Eduarda; Ahmad, Iqbal; Iqbal, Muhammad

doi:10.3389/fpls.2014.00662

Cited by 114 publications

(54 citation statements)

References 43 publications

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“…4 A and 7 A). On the other hand, the osmoregulator substances, mainly glycine betaine (Chen and Murata, 2011) accumulated in greater amounts in tri and phyB2 mutants and may be responsible for maintaining the integrity of the membranes of chlorophyll molecules and the removal of reactive oxygen species (ROS) (Anjum et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Phytochromes are key regulators of abiotic stress responses in tomato

Gavassi

Monteiro

Campos

et al. 2017

Scientia Horticulturae

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A B S T R A C TPhytochromes are the best characterized and most frequently studied plant photoreceptors. A plethora of studies have revealed important roles for phytochromes in plant development, and more recently, evidence indicates that these photoreceptors also modulate responses to a multitude of abiotic and biotic stresses. Thus, the present work aimed to investigate whether tomato phytochromes phyA, phyB1 and phyB2 are involved with responses to low water potential (polyethylene glycol 6000 at Ψ w of −0.3 MPa), high salinity (100 mM NaCl), cadmium contamination (65 mM CdCl 2 ), high temperature (42°C for six hours during three days) and ultraviolet B radiation (UV-B − 280-320 nm for eight hours during three days) stresses. For this purpose, seedlings of tomato mutants impacted by phytochrome A (fri), phytochrome B1 (tri) and phytochrome B2 (phyB2) were subjected to abiotic stresses and evaluated for their growth, pigment and osmoprotectant accumulation and lipid peroxidation. Under the conditions of this study, the results did not shown large variations of phyA mutant when compared to the wild genotype. However, the tomato phytochromes B1 and B2 mainly act as negative regulators of growth, pigment maintenance and osmoprotectant accumulation during responses to the different abiotic stresses.

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Section: Discussionmentioning

confidence: 99%

Phytochromes are key regulators of abiotic stress responses in tomato

Gavassi

Monteiro

Campos

et al. 2017

Scientia Horticulturae

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“…Salinity stress often results in extensive lipid peroxidation, and the extent of lipid peroxidation is used as an indicator of salt-induced oxidative damage (Hernandez and Almansa 2002). A number of studies employed a relation between GSH and proline synthesis (Anjum et al 2014). The early response in the roots of mildly stressed seedlings was predominately governed by osmolyte accumulation (Supplementary Table S1).…”

Section: Discussionmentioning

confidence: 99%

Early osmotic, antioxidant, ionic, and redox responses to salinity in leaves and roots of Indian mustard (Brassica juncea L.)

2015

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Salt-stress-induced alterations in osmotic, ionic, and redox responses were studied in the early period of treatment (30 min to 5 days) in seedlings of Brassica juncea L. Roots and shoots under mild (50 mM) and severe (250 mM) NaCl stress were analyzed for growth, oxidative stress, osmolyte accumulation, antioxidant defense, and redox state. Growth reduction was less pronounced in the early time period of salt stress while oxidative damage increased linearly and in a sustained manner under severe stress up to 6 h. An early and transient reactive oxygen species (ROS) burst, as evidenced by superoxide and hydrogen peroxide level was observed, followed by activation of enzymatic antioxidant system (GPX, SOD, CAT, and GR) in both root and shoot. The enzymatic activity was not affected much under mild stress particularly at early phase; however, severe stress induced a significant increase in the activity of antioxidant enzymes. Root ascorbate was progressively accumulated, and its redox state maintained in the early time phase of treatment under mild stress while increase in root and shoot glutathione content was recorded under mild stress at 5 days when the active ascorbate pool decreased. While early period of salt stress showed significant Na(+) accumulation over control, plants subjected to mild stress measured less Na(+) accumulation up to 5 days compared to severely stressed plants. The results showed an early induction of differential responses to salt stress in roots and shoots of Brassica which include growth limitations, reduced relative water content, increased osmolytes, redox state, and antioxidant system, and a significant Na(+) increase. The results also indicate that roots and shoots may have distinct mechanisms of responses to salt stress.

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“…Anjum et al 18 reported that assimilatory of SO 4 2− and NO 3 − reduction coordinated well in the mitigation of metal(loid) toxicity. Because of the optimization of a large N and S requirement, plants maintained healthy growth and, ultimately, a high yield under Cd stress 19,20 . Few reports, however, are available on the interactive effects of S and N sources in the mitigation of Cd toxicity 11 .…”

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confidence: 99%

Migration and transformation of cadmium in rice - soil under different nitrogen sources in polymetallic sulfide mining areas

Zhang

et al. 2020

Sci Rep

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We conducted pot experiments to assess the bioavailability of cadmium (cd) in contaminated rhizosphere soil and accumulation in rice organs in response to nitrogen (n) supply ((nH 4 ) 2 So 4 , nH 4 no 3 , NH 4 cl). the results showed that the concentration of bioavailable cd in rice rhizosphere soil was (nH 4 ) 2 So 4 treatment > nH 4 cl treatment > nH 4 no 3 treatment at the same level of n application and growth period; the cd concentration in rice roots was (nH 4 ) 2 So 4 treatment > nH 4 no 3 treatment > nH 4 cl treatment; and the cd concentration in rice straw was nH 4 no 3 treatment > nH 4 cl. The Cd concentration in rice roots, straws, and seeds at the maturity stage was (NH 4 ) 2 So 4 treatment > nH 4 Cl treatment. With the same N fertilizer, excessive N promoted Cd accumulation in rice at later growth stages. this suggested that sulfate (So 4 2− ) influenced Cd concentration in rice. NH 4 cl application maintained a low Cd level in different rice organs with the same N level. This confirmed that nH 4 Cl is a safe N source for rice planting in polymetallic sulfide mining areas. The study concludes that appropriate nH 4 cl levels for cd-contaminated paddy soil with high-S-content could obtain rice grains with Cd concentrations below the food safety standards (0.2 or 0.4 mg·kg −1 ).

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Glutathione and proline can coordinately make plants withstand the joint attack of metal(loid) and salinity stresses

Cited by 114 publications

References 43 publications

Phytochromes are key regulators of abiotic stress responses in tomato

Phytochromes are key regulators of abiotic stress responses in tomato

Early osmotic, antioxidant, ionic, and redox responses to salinity in leaves and roots of Indian mustard (Brassica juncea L.)

Migration and transformation of cadmium in rice - soil under different nitrogen sources in polymetallic sulfide mining areas

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