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2012 | OriginalPaper | Buchkapitel

4. Metal Hyperaccumulation and Tolerance in Alyssum, Arabidopsis and Thlaspi: An Overview

verfasst von : Sarvajeet S. Gill, Naser A. Anjum, Iqbal Ahmad, P. Thangavel, G. Sridevi, M. Pacheco, Armando C. Duarte, Shahid Umar, Nafees A. Khan, M. Eduarda Pereira

Erschienen in: The Plant Family Brassicaceae

Verlag: Springer Netherlands

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Abstract

Toxic metals (TMs) and metalloids are natural components of environments, but elevated toxic levels and high persistence of TMs and metalloids in major compartments of the biosphere has posed various uncompromising and fatal effects on flora and fauna, and thus, has threatened the stability of the ecosystems as well. In addition, with the rapid increase in anthropological practices, a large number of TMs and metalloids ions are being added to the natural environment disrupting the ecosystem. A plethora of plant species have been identified so far to have potential for the remediation of TMs and metalloids-contaminated sites. Although, a large number of natural metal hyperaccumulator plant species from 34 different plant families including Asteraceace, Brassicaceae, Caryophyllaceae, Poaceae, Violaceae and Fabaceae has evolved the ability to take up, tolerate and accumulate exceptionally high concentrations of metals and metalloids present in the soil (and water) and, more importantly, in their aboveground biomass without visible toxicity symptoms but with 87 species classified as metal hyperaccumulators, the family Brassicaceae best represents amongst these metal-hyperaccumulator families. Of these 87 different metal-hyperaccumulator plant species in the family Brassicaceae, plant species in particular model metal hyperaccumutaor plant species Alyssum, Thlaspi and Arabidopsis have been studied extensively for their ability to hyperaccumulate, remove, destroy, degrade, sequester, transform, assimilate, metabolize or detoxify majority of TMs and metalloids in varied environmental compartments. Additionally, significant technological advancements in varied scientific fields have now deciphered important physiological and molecular mechanisms of TMs- and metalloids-remediation processes/intricacies in metal hyper accumulating plant species. Based on the plethora of recent published reports the current chapter critically discusses important strategies adopted by Alyssum, Arabidopsis and Thlaspi for TMs- and metalloids-hyperaccumulation/remediation and tolerance.

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Vorheriges Kapitel Cadmium Accumulation by Plants of Brassicaceae Family and Its Connection with Their Primary and Secondary Metabolism

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Titel: Metal Hyperaccumulation and Tolerance in Alyssum, Arabidopsis and Thlaspi: An Overview
verfasst von: Sarvajeet S. Gill
Naser A. Anjum
Iqbal Ahmad
P. Thangavel
G. Sridevi
M. Pacheco
Armando C. Duarte
Shahid Umar
Nafees A. Khan
M. Eduarda Pereira
Verlag: Springer Netherlands
Buch: The Plant Family Brassicaceae
Print ISBN: 978-94-007-3912-3

Electronic ISBN: 978-94-007-3913-0

Copyright-Jahr: 2012
DOI: https://doi.org/10.1007/978-94-007-3913-0_4