Mercury Induced Oxidative Stress of Antioxidants in&lt;i&gt; Clitoria ternatea&lt;/i&gt; L.

Priya, M. Sangeetha; Balakrishnan, V.; Lakshmi, A.; Aruna, Rita Mary; Ravindran, K.C.

doi:10.18052/www.scipress.com/ilns.23.1

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…and enzymatic antioxidants [viz., superoxide dismutase (SOD), peroxidase, catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR)] to counteract the excess ROS (Mittler, 2002;Foyer and Noctor, 2003;Mittler et al, 2004). Many studies have demonstrated the importance of the activation of enzymatic antioxidants as a plant adaptation response to Hg-induced oxidative stress (Zhou et al, 2007;Shiyab et al, 2009;Priya et al, 2014;Malar et al, 2015). There is clear evidence that Cys itself has ROS-scavenging activity, such as that of O 2 and H 2 O 2 (Paulsen and Carroll, 2013;Kim et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Exogenous Cysteine Improves Mercury Uptake and Tolerance in Arabidopsis by Regulating the Expression of Heavy Metal Chelators and Antioxidative Enzymes

Kim

Gwon²,

Kim³

2022

Front. Plant Sci.

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Cysteine (Cys) is an essential amino acid component of the major heavy metal chelators, such as glutathione (GSH), metallothioneins (MTs), and phytochelatins (PCs), which are involved in the pathways of mercury (Hg) tolerance in plants. However, the mechanism through which Cys facilitates Hg tolerance in plants remains largely unclear. In this study, we investigated the effects of exogenous Cys on Hg uptake in the seedlings, roots, and shoots of Arabidopsis throughout 6 and 36 h of Hg exposure and on the regulation of Hg detoxification by heavy metal chelators and antioxidative enzymes. The results showed that exogenous Cys significantly improved Hg tolerance during the germination and seedling growth stages in Arabidopsis. Exogenous Cys significantly promoted Hg uptake in Arabidopsis roots by upregulating the expression of the Cys transporter gene AtLHT1, resulting in increased Hg accumulation in the roots and seedlings. In Arabidopsis seedlings, exogenous Cys further increased the Hg-induced glutathione synthase (GS1 and GS2) transcript levels, and the Hg and Hg + Cys treatments greatly upregulated MT3 expression after 36 h exposure. In the roots, MT3 was also significantly upregulated by treatment of 36 h of Hg or Hg + Cys. Notably, in the shoots, MT2a expression was rapidly induced (10-fold) in Hg presence and further markedly increased (20-fold) by exogenous Cys. Moreover, in the seedlings, exogenous Cys upregulated the transcripts of all superoxide dismutase (CuSOD1, CuSOD2, MnSOD1, FeSOD1, FeSOD2, and FeSOD3) within 6 h and subsequently increased the Hg-induced GR1 and GR2 transcript levels at 36 h, all of which could eliminate the promotion of reactive oxygen species production and cell damage caused by Hg. Additionally, exogenous Cys upregulated all the antioxidative genes rapidly in the roots and subsequently increased the expression of CuSOD1, CuSOD2, and MnSOD1 in the shoots. These results indicate that exogenous Cys regulates the transcript levels of heavy metal chelators and antioxidative enzymes differently in a time- and organ-specific manner under Hg stress. Taken together, our study elucidates the positive functional roles of exogenous Cys in the Hg uptake and tolerance mechanisms of Arabidopsis.

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Section: Introductionmentioning

confidence: 99%

Exogenous Cysteine Improves Mercury Uptake and Tolerance in Arabidopsis by Regulating the Expression of Heavy Metal Chelators and Antioxidative Enzymes

Kim

Gwon²,

Kim³

2022

Front. Plant Sci.

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“…The activities of anti-oxidative enzymes in the seedlings of Phaseolus aureus found that effects of Hg and cadmium (Cd) had little primary damaging effect on membranes [21]. Antioxidant effect of HgCl 2 was in selected plant Clitoria ternatea L. It increases H 2 O 2 content and the antioxidant enzyme activities such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) were observed in HgCl 2 treated plants when compared with control [22].…”

Section: Discussionmentioning

confidence: 99%

Co-exposure Effects of Selenium and Mercury on Phaseolus vulgaris Excised Leaves Segment by Enhancing the NR, Anti-oxidative Enzyme Activity and Detoxification Mechanisms

Shrivastava¹,

Shrivastav²

2015

Adv Tech Biol Med

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Mercury is known to disrupt the biological function in plants by inhibiting their growth and developmental process, while selenium (Se) is an essential micronutrient within the appropriate amount. This paper is aimed to study co application and interactive effects of selenium (Se) and mercury (Hg) on the Nitrate Reductase NR (such as in-vivo and endogenous) and the antioxidant system through a pot experiment and clarify the possible mechanism how Se alleviates the toxicity of Hg. The observations indicate that when selenium applied after mercury exposure the enzyme activity enhanced hence Se may reduce the toxic level of Hg in phaseolus vulgaris.

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“…Hence, soil pH ranging from pH 6.0 to pH 7.0 promotes the best availability of plant bioactive compounds and nutrients. Some plants such as blueberries and conifer trees tolerate strong acid soils and grow well in them [40].…”

Section: Soil Phmentioning

confidence: 99%

Influences of Environmental Conditions to Phytoconstituents in Clitoria ternatea (Butterfly Pea Flower) – A Review

Jamil

Zairi²,

Nasim

et al. 2018

JST

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Extreme environmental conditions will consequently become a disturbance on all phases of plant growth. Malaysia is one of the developing countries that face challenges of extreme environmental conditions from climate change such as water availability and soil salinity. In response to global climate change, plants are trying to survive through several adaptation mechanisms. Clitoria ternatea or also known as Butterfly pea flower is a potential plant that can tolerate different environmental parameters. Besides, C. ternatea contains essential phytochemical compounds for pharmaceuticals, textile, medicinal and food industries. C. ternatea is originated from tropical Asia countries and it is widely available in the Asian region. Butterfly pea flower has attractive petal colours due to the presence of its bioactive compounds. C. ternatea is claimed as curing various ailments and has great antioxidant activity due to their bioactive compounds such as anthocyanins, alkaloid, steroid, tannin, reducing sugars and flavonoid. Clitoria ternatea has been evaluated as a potential medicinal plant, such as antiviral, anti-inflammatory, anti-allergic and prevent from cardiovascular damage. Meanwhile, by varying different environmental parameters, the adaptations of phytochemical in C. ternatea is expressed variously. Hence, this paper reviews the physiological effect of growth conditions on Clitoria ternatea and its effect on the production of beneficial phytoconstituents.

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Mercury Induced Oxidative Stress of Antioxidants in<i> Clitoria ternatea</i> L.

Cited by 6 publications

References 9 publications

Exogenous Cysteine Improves Mercury Uptake and Tolerance in Arabidopsis by Regulating the Expression of Heavy Metal Chelators and Antioxidative Enzymes

Exogenous Cysteine Improves Mercury Uptake and Tolerance in Arabidopsis by Regulating the Expression of Heavy Metal Chelators and Antioxidative Enzymes

Co-exposure Effects of Selenium and Mercury on Phaseolus vulgaris Excised Leaves Segment by Enhancing the NR, Anti-oxidative Enzyme Activity and Detoxification Mechanisms

Influences of Environmental Conditions to Phytoconstituents in Clitoria ternatea (Butterfly Pea Flower) – A Review

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