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Gene mediated phytodetoxification of environmental pollutants

Agrawal, S and Kumar, V and Singh, S and Shahi, SK (2022) Gene mediated phytodetoxification of environmental pollutants. [Book Chapter]

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Official URL: https://doi.org/10.1016/B978-0-323-85763-5.00033-7


Environmental pollution due to various refractory pollutants, including heavy metals, is a global issue, posing a risk to humans, animals, microorganisms, and plants. Among the various chemical contaminants, heavy-metal contaminants at higher concentrations are regarded as one of the major environmental concerns due to their nondegradable nature. Thus, heavy metals can remain in the environment for a long time and enter to the food chain through food crops, and finally accumulate in the humans’ tissues via biomagnification. Phytoremediation is an emerging, cost-effective, sustainable, and green biotechnological approach where plants are grown in contaminated soil, sediment, and water to increase the decomposition, sequestration, detoxification, or removal rate of chemical contaminants by in planta and ex planta mechanisms. However, the plant performance in a contaminated environment is very slow due to toxicity of chemical contaminants. Thus, detailed mechanisms of metals accumulation, detoxification, and sequestration in plants’ tissues are needed to explore the phytoremediation efficacy of plants grown in a contaminated environment. The present book chapter gives an overview of the environmental pollution, toxicity profile, and health hazards of numerous heavy metals discharged from industries and anthropogenic sources. Further, we explored the mechanisms of heavy metals’ translocation and detoxification by the action of plant’s metal chelators, phytochelatin, metallothionein genes, and metal transporters, that increase metal uptake and sequestrations in various aerial parts. In addition, the present chapter also provides an overview of how transgenic plants are produced and how they remediate and detoxify heavy metals from polluted environment.

Item Type: Book Chapter
Publication: Phytoremediation Technology for the Removal of Heavy Metals and Other Contaminants from Soil and Water
Publisher: Elsevier
Additional Information: The copyright for this article belongs to the Elsevier.
Department/Centre: Division of Interdisciplinary Sciences > Interdisciplinary Centre for Water Research
Date Deposited: 22 Jun 2022 09:12
Last Modified: 22 Jun 2022 09:12
URI: https://eprints.iisc.ac.in/id/eprint/73925

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