Mercury induced oxidative stress, DNA damage, and activation of antioxidative system and Hsp70 induction in duckweed ( Lemna minor )

Zhang, Tingting; Lu, Qianqian; Su, Chunlei; Yang, Yaru; Hu, Dan; Xu, Qinsong

doi:10.1016/j.ecoenv.2017.04.058

Cited by 83 publications

(31 citation statements)

References 63 publications

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“…Mercury is one of the most dangerous heavy metals for plants with phytotoxic properties that cause redox imbalance, change in photosynthetic activity, impair growth rate, and a decrease in production (Cui et al, 2015;Gontia-Mishra et al, 2016;Zhang et al, 2017). The high amount of mercury accumulation in plants leads to the death of cells and tissues (Sahu et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Exogenous cysteine alleviates mercury stress by promoting antioxidant defence in maize (Zea mays L.) seedlings

Aysin¹,

Karaman²,

Yilmaz³

et al. 2020

Turk J Agric For

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Introduction Higher plants develop several adjustments to almost all different environments. Due to their immobile structure, plants are constantly subjected to abiotic and biotic stress factors that negatively affect plant growth, development, and reproduction (Rejeb et al., 2014). The impact of unfavourable conditions on the ecosystem is increasing at an alarming rate due to the rapid increase in soil and water pollution and destruction of vegetation through the excessive release of wastes produced by human activities such as industrialization and urbanization (Nagajyoti et al., 2010; Mantri et al., 2012). Heavy metals are important environmental pollutants and their toxicity is of increasing importance due to ecological, evolutionary, nutritional, and environmental reasons. They have the greatest availability in soil and water ecosystems and present a relatively small proportion in the atmosphere as particulates or vapours. The extent of heavy metal toxicity in plants differs according to the plant species, metal specificity, concentration, chemical form, exposure type, and duration (Nagajyoti et al., 2010; Yadav, 2010). Mercury is known to be one of the most important toxic heavy metals in nature (Tchounwou et al., 2012). The source of natural mercury is from "hot spots" through natural processes such as hot springs or volcanic explosions. Although mercury is present in the earth's crust in low concentrations, human activities such as mining, burning of fossil fuels, release of industrial wastes into aquatic environments cause an increase in the mercury level in the atmosphere, soil, and water (Boening, 2000; Patra and Sharma, 2000; Lopes et al., 2013; Mahbub et al., 2017). Besides, the widespread use of mercury in chlorinealkali processes, dental amalgams, thermometers, and fungicides has contributed significant quantities of Hg into the aquatic and terrestrial ecosystems (Jarup, 2003). When mercury is released into the air, it can travel long distances and then be deposited into the water and ground.

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Section: Discussionmentioning

confidence: 99%

Exogenous cysteine alleviates mercury stress by promoting antioxidant defence in maize (Zea mays L.) seedlings

Aysin¹,

Karaman²,

Yilmaz³

et al. 2020

Turk J Agric For

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“…For example, Malar et al () revealed increased MDA level in both leaves and roots of Eichhornia crassipes in response to Pb treatment. Various studies have revealed that metals often trigger the occurrence of LP (Soares et al , b, Zhang et al , Soares et al , b). For instance, elevated Pb levels instigated LP and oxidative stress in Oryza sativa (Verma and Dubey ) and Coronopus didymus (Sidhu et al ).…”

Section: No‐mediated Regulation Of Metal‐induced Oxidative Stressmentioning

confidence: 99%

Nitric oxide‐mediated regulation of oxidative stress in plants under metal stress: a review on molecular and biochemical aspects

Sharma

Soares

Sousa

et al. 2019

Physiologia Plantarum

122

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Given their sessile nature, plants continuously face unfavorable conditions throughout their life cycle, including water scarcity, extreme temperatures and soil pollution. Among all, metal(loid)s are one of the main classes of contaminants worldwide, posing a serious threat to plant growth and development. When in excess, metals which include both essential and non‐essential elements, quickly become phytotoxic, inducing the occurrence of oxidative stress. In this way, in order to ensure food production and safety, attempts to enhance plant tolerance to metal(loid)s are urgently needed. Nitric oxide (NO) is recognized as a signaling molecule, highly involved in multiple physiological events, like the response of plants to abiotic stress. Thus, substantial efforts have been made to assess NO potential in alleviating metal‐induced oxidative stress in plants. In this review, an updated overview of NO‐mediated protection against metal toxicity is provided. After carefully reviewing NO biosynthetic pathways, focus was given to the interaction between NO and the redox homeostasis followed by photosynthetic performance of plants under metal excess.

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“…[219][220]. Detoxification mechanisms to combat Hg-induced oxidative stress include enzymatic antioxidants and some nonenzymatic antioxidants, such as the following: glutathione [221], phytochelatin [222], salicylic acids [223], ascorbic acid [224], selenium, [225], proline [226] and tocopherols [227]. This process is correlated with the disruption of biomembrane lipids and cellular metabolism, resulting in plant injury [228].…”

Section: Toxic Effects On Plantsmentioning

confidence: 99%

Mercury in the terrestrial environment: a review

Gworek¹,

Dmuchowski²,

Baczewska-Dąbrowska

2020

Preprint

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Environmental contamination by mercury is and will continue to be a serious risk for human health. Pollution of the terrestrial environment is particularly important as it is a place of human life and food production. Publication presents a review of the literature on issues related to Hg pollution of the terrestrial environment: soil and plants and their transformations. Different forms of atmospheric Hg may be deposited on surfaces by way of wet and dry processes. These forms may be sequestered within terrestrial compartments or emitted back into the atmosphere, and the relative importance of these processes is dependent on the form of Hg, the surface chemistry, and the environmental conditions. On the land surface, Hg deposition mainly occurs in the oxidized form (Hg 2+ ), and its transformations are associated primarily with the oxidation-reduction potential of the environment and the biological and chemical processes of methylation. The deposition of Hg on ground with low vegetation as 3–5 times lower than that in forests. The estimation of Hg emissions from soil and plants, which occur mainly in the Hg 0 form, is very difficult. Generally, the largest amounts of Hg are emitted from tropical regions, and the lowest levels are from the polar regions.

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Mercury induced oxidative stress, DNA damage, and activation of antioxidative system and Hsp70 induction in duckweed ( Lemna minor )

Cited by 83 publications

References 63 publications

Exogenous cysteine alleviates mercury stress by promoting antioxidant defence in maize (Zea mays L.) seedlings

Exogenous cysteine alleviates mercury stress by promoting antioxidant defence in maize (Zea mays L.) seedlings

Nitric oxide‐mediated regulation of oxidative stress in plants under metal stress: a review on molecular and biochemical aspects

Mercury in the terrestrial environment: a review

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