نتایج جستجو برای: hyperaccumulator

تعداد نتایج: 580  

2017
Zahra Souri Naser Karimi Luisa M. Sandalio

Arsenic (As) pollution, which is on the increase around the world, poses a growing threat to the environment. Phytoremediation, an important green technology, uses different strategies, including As uptake, transport, translocation, and detoxification, to remediate this metalloid. Arsenic hyperaccumulator plants have developed various strategies to accumulate and tolerate high concentrations of...

2011
E. Ashrafi A. Alemzadeh M. Ebrahimi E. Ebrahimie N. Dadkhodaei M. Ebrahimi

Phytoremediation refers to the use of plants for extraction and detoxification of pollutants, providing a new and powerful weapon against a polluted environment. In some plants, such as Thlaspi spp, heavy metal ATPases are involved in overall metal ion homeostasis and hyperaccumulation. P1B-ATPases pump a wide range of cations, especially heavy metals, across membranes against their electrochem...

Journal: :Annals of botany 2010
Lorenzo Cecchi Roberto Gabbrielli Miluscia Arnetoli Cristina Gonnelli Agim Hasko Federico Selvi

BACKGROUND AND AIMS Nickel (Ni) hyperaccumulation is a rare form of physiological specialization shared by a small number of angiosperms growing on ultramafic soils. The evolutionary patterns of this feature among European members of tribe Alysseae (Brassicaceae) are investigated using a phylogenetic approach to assess relationships among Ni hyperaccumulators at the genus, species and below-spe...

2014
J. Mesjasz-Przybylowicz A. D. Barnabas I. Yousef P. Dumas

Hyperaccumulation is an unusual plant response to metaliferous soils. Such soils like those derived from ultramafic rocks, have elevated concentrations of heavy metals, mainly Ni, Cr, Zn and Cd. Most plants growing on these soils exclude metals from their shoots as excessive accumulation of heavy metals is toxic to the majority of plants. However, about 2% of plants growing on metaliferous soil...

2014
Ahmad Mohtadi

1 Heavy metal tolerance and accumulation in Matthiola flavida, a novel Iranian lead hyperaccumulator 2 The candidate was financially supported by a scholarship from the

Journal: :Physiologia plantarum 2014
Ali F El Mehdawi Ray Jason B Reynolds Christine N Prins Stormy D Lindblom Jennifer J Cappa Sirine C Fakra Elizabeth A H Pilon-Smits

Symphyotrichum ericoides was shown earlier to contain hyperaccumulator levels of selenium (Se) in the field (>1000 mg kg(-1) dry weight (DW)), but only when growing next to other Se hyperaccumulators. It was also twofold larger next to hyperaccumulators and suffered less herbivory. This raised two questions: whether S. ericoides is capable of hyperaccumulation without neighbor assistance, and w...

Journal: :The New phytologist 2008
Miriam L Galeas Erin M Klamper Lindsay E Bennett John L Freeman Boris C Kondratieff Colin F Quinn Elizabeth A H Pilon-Smits

The elemental defense hypothesis proposes that some plants hyperaccumulate toxic elements as a defense mechanism. In this study the effectiveness of selenium (Se) as an arthropod deterrent was investigated under field conditions. Arthropod loads were measured over two growing seasons in Se hyperaccumulator habitats in Colorado, USA, comparing Se hyperaccumulator species (Astragalus bisulcatus a...

2009
Marcelo de A Guimarães Jeffery L Gustin David E Salt

* The extreme phenotype of zinc (Zn) hyperaccumulation, which is found in several Brassicaceae species, is determined by mechanisms that promote elevated Zn tolerance and high Zn accumulation in shoots. * We used reciprocal grafting between a Zn hyperaccumulator, Thlaspi caerulescens, and a Zn nonaccumulator, Thlaspi perfoliatum, to determine the relative importance of roots and shoots in Zn hy...

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