Modulation of zinc-induced oxidative damage in Solanum melongena by 6-benzylaminopurine involves ascorbate–glutathione cycle metabolism

Wu, Xuexia; He, Jie; Ding, Hongyan; Zhu, Zongwen; Chen, Jianlin; Xu, Shengyu; Zha, Dingshi

doi:10.1016/j.envexpbot.2015.03.004

Cited by 39 publications

(21 citation statements)

References 59 publications

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“…The ascorbate peroxidase (APX) enzymes neutralize the H 2 O 2 into H 2 O by utilizing ascorbate as an electron donor, which is subsequently oxidized to form monohydroascorbic acid (MDHA). The AsA-GSH cycle system may use AsA/DHA, GSH/GSSG, and NAD(P)H/NAD(P) to maintain an appropriate redox environment in plants [ 62 , 63 ]. Besides, γ-glu-cys is utilized to synthesize GSH via the glutathione synthase pathway.…”

Section: Discussionmentioning

confidence: 99%

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

Liang

et al. 2021

J Nanobiotechnol

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Background Cadmium (Cd) is amongst the most toxic heavy metals that severely affects crop growth, whereas application of nanoparticles (NPs) to negate the toxic effects of heavy metals could be an effective management approach. In the present study, the seeds of two fragrant rice varieties i.e., Yuxiangyouzhan and Xiangyaxiangzhan under normal and Cd stress conditions i.e., 0 and 100 mg L− 1 applied with four levels of ZnO NPs i.e., 0, 25, 50, and 100 mg L− 1. Results Seed priming with ZnO NPs had no significant effect on the seed germination (p > 0.05) however, it substantially improved the seedling growth and other related physiological attributes under the Cd stress. The mean fresh weight of the shoot, and whole seedling was increased by 16.92–27.88% and by 16.92–27.88% after ZnO NPs application. The root fresh weight, root-shoot length was also substantially improved under ZnO NPs treatment. Moreover, application of ZnO NPs induced modulations in physiological and biochemical attributes e.g., the superoxide dismutase (SOD) activity in root and shoot, the peroxidase (POD) activity and metallothionein contents in root were increased under low levels of ZnO NPs. The α-amylase and total amylase activity were improved by ZnO NPs application under Cd Stress. Besides, modulation in Zn concentration and ZnO NPs uptake in the seedling were detected. The metabolomic analysis indicated that various pathways such as alanine, aspartate and glutamate metabolism, phenylpropanoid biosynthesis, and taurine and hypotaurine metabolism were possibly important for rice response to ZnO NPs and Cd. Conclusion Overall, application of ZnO NPs substantially improved the early growth and related physio-biochemical attributes in rice. Our findings provide new insights regarding the effects of ZnO NPs on seed germination, and early growth of rice, and its potential applications in developing crop resilience against Cd contaminated soils.

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Section: Discussionmentioning

confidence: 99%

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

Liang

et al. 2021

J Nanobiotechnol

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“…CK100 treatment also decreased ROS production under well-watered condition. Previous studies suggested that exogenous application of CK may alleviate ROS damage in various plants [ 14 , 47 , 48 ]. Drought stress induced excess and toxic ROS in cells, which may cause damage to cell membranes.…”

Section: Discussionmentioning

confidence: 99%

Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass

et al. 2016

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Cytokinin (CK) is a vital plant hormone that controls many aspects of growth and development in plants. Nitrogen (N) is the indispensable macronutrient needed in plants and also one of the most important limiting factors for plant growth. This study was designed to investigate the simultaneous effects of CK and N on the visual turf quality and antioxidant metabolism of drought-stressed creeping bentgrass (Agrostis stolonifera L.). ‘PennA-4’ creeping bentgrass treated with trans-zeatin riboside at three rates of CK concentrations of 0, 10 and 100 μM (designated by CK0, 10, and 100) and two nitrogen rates with 2.5 and 7.5 kg N·ha-1 every 15 days (designated by low and high N) in a complete factorial arrangement was grown under two soil moisture regimes: well-watered and drought stress. Exogenous CK improved turf quality and delayed leaf wilting under drought stress, especially under high N. The grasses treated with CK10 and CK100 had lower O2- production and H2O2 concentration than those without CK treatment. The CK100 treatment enhanced the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), and guaiacol peroxidase (POD) by 25%, 22%, 17% and 24%, respectively, relative to CK0. Moreover, the activity changes of the antioxidant enzyme isoforms were more significant under high N condition relative to low N condition. Our results demonstrated the beneficial impacts of CK and N on physiological reactions, especially antioxidant metabolism, and foliar application of CK at 10 or 100 μM plus 7.5 kg ha-1 N biweekly may improve drought stress resistance of creeping bentgrass.

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“…During salt stress, exogenous CKs applications have been shown to enhance the salt tolerance in various plant species, such as eggplant (Solanum melongena), which displayed increased photosynthetic activity, biomass accumulation of roots and shoots and stem width along with decreased superoxide radical production rate and malondialdehyde (MDA) content. 96 Tekchandani & Guruprasad 2 found that Kinetin caused an enormous increase in the activity of peroxidase in UV-B exposed cucumber cotyledons. Ma et al 97 demonstrated that 6-benzylaminopurine effectively reduced salt-induced cellular damages by suppressing oxidative and ionic stresses in perennial ryegrass.…”

Section: Role Of Cytokinins On Abiotic Stressesmentioning

confidence: 99%

Interaction of cytokinins with UV-B (280 -315nm) on the expansion growth of cucumber cotyledons

Kataria¹,

Kn²

2018

HIJ

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The negative effect on plant responses are expected due to increased amounts of ultraviolet-B (UV-B) radiation reaching on the Earth's surface by stratospheric ozone depletion. Cytokinins (CKs) are essential phytohormones in plant growth and development. Perusal of relevant literature reveals that CKs mitigate the oxidative damage caused by abiotic stresses like salt, drought, high temperature and heavy metal due to their antioxidant effects. However, very few reports are available on the interaction of CKs with UV-B stress on the expansion growth of the cucumber cotyledons. CKs induced the expansion growth of the excised cucumber cotyledons in the darkness. CKs induced expansion growth of cucumber cotyledons in darkness was inhibited by supplemental UV-B. UV-B radiation enhanced the level of oxyradicals like superoxide and hydroxide radicals in the excised cucumber cotyledons, which was evident by EPR spectroscopy. CKs like Zeatin, TDZ, BAP and FAP reduced the level of oxyradicals produced in the dark grown cucumber cotyledons, while promoting the expansion growth of the cotyledons. Production of oxyradical in UV-B exposed cotyledons showed that these oxyradicals might partially account for inhibition of expansion growth. Since considerable amount of oxyradicals were quenched by CKs at higher concentrations (10 and 20 µg/ml) it partially restores the inhibition of expansion growth caused by UV-B stress. It indicates that overproduction of oxyradicals by UV-B could not be entirely responsible for the inhibition of CKs induced expansion growth of cotyledons; which might be caused by some other physiological changes caused by UV-B irradiation in addition to the production of oxyradicals. UV-B is also known to inactivate protein inhibitor of peroxidase in cucumber cotyledons. This may reduce the antioxidants defence and enhance the damaging effects of oxyradicals for the growth of cotyledons.

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Modulation of zinc-induced oxidative damage in Solanum melongena by 6-benzylaminopurine involves ascorbate–glutathione cycle metabolism

Cited by 39 publications

References 59 publications

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

ZnO nanoparticle-based seed priming modulates early growth and enhances physio-biochemical and metabolic profiles of fragrant rice against cadmium toxicity

Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass

Interaction of cytokinins with UV-B (280 -315nm) on the expansion growth of cucumber cotyledons

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