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Ali, Nadia; Bernal, M.P.; Ater, Mohammed

doi:10.1023/a:1014995321560

Cited by 219 publications

(27 citation statements)

References 201 publications

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“…Excess of heavy metals usually affects mineral nutrient homeostasis (Ali et al 2002). As we observed, potassium content decreased in both the leaf rosettes and roots of chamomile (Tables 1 and 2).…”

Section: Discussionsupporting

confidence: 54%

“…4), this could be an indication of lower Ni toxicity for chamomile plants in comparison to Cu . Increase of Fe content was recorded in the rosettes and roots, an observation which was also found in Zea mays cultured in Cu excess (Ali et al 2002). In contrast, Brassica oleracea exhibited depressed tissue iron content (Pandey and Sharma 2002); this could be attributed to higher concentration of applied Ni (500 μM).…”

Section: Discussionsupporting

confidence: 51%

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Nickel Uptake and its Effect on Some Nutrient Levels, Amino Acid Contents and Oxidative Status in Matricaria chamomilla Plants

Kováčik¹,

Klejdus

Hedbávný

et al. 2009

Water Air Soil Pollut

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The effect of nickel (Ni) excess on selected aspects of chamomile (Matricaria chamomilla L.) metabolism was studied. Water-soluble Ni represented 27%, 46%, and 47%, and the methanol-soluble fraction 54%, 70%, and 88% of total shoot Ni content after 10 days of treatments with 3, 60, and 120 μM Ni, respectively. "Intra-root" Ni content represented 72% (3 μM), 96% (60 μM), and 78% (120 μM) of total root Ni. Leaf rosettes treated with 120 μM contained 137 μg Ni g −1 DW after 10 days of treatment. The highest Ni concentration particularly affected the content of mineral nutrients (e.g., decrease of K and increase of Fe) and activity of selected antioxidative enzymes (increase of ascorbate peroxidase and guaiacol peroxidase activities). Malondialdehyde accumulation was not influenced (measured in methanol extracts). Among 17 detected free amino acids, accumulation of histidine, proline, methionine, and cysteine was most distinct in the leaf rosettes and/or roots, indicating their involvement in Ni detoxification. Lower Ni toxicity in comparison to previously tested metals is also discussed.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionsupporting

confidence: 51%

Nickel Uptake and its Effect on Some Nutrient Levels, Amino Acid Contents and Oxidative Status in Matricaria chamomilla Plants

Kováčik¹,

Klejdus

Hedbávný

et al. 2009

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…SOD is a metalloenzyme containing Fe, Cu/Zn or Mn in its prosthetic groups. Since high concentrations of Cd or Cu have been shown to decrease Fe, Mn and Zn (Gussarsson 1994;Ait Ali et al 2002) contents in plant tissues it can be speculated that reduction in SOD activity in the leaves of tomato plants subjected to excess Cd or Cu may result from deficiency of metals essential for catalytic action of this enzyme. The lessening in the antioxidative enzymes beyond 12 h of heavy metal exposure can be also a consequence of direct and indirect Cd and Cu induced-ROS accumulation.…”

Section: Discussionmentioning

confidence: 99%

Cadmium and copper induction of oxidative stress and antioxidative response in tomato (Solanum lycopersicon) leaves

et al. 2008

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We compare cadmium and copper induced oxidative stress in tomato leaves and the antioxidative enzyme response during a time course of 96 h. Plants were subjected to 25 lM of CdCl 2 or CuSO 4 and malondialdehyde (MDA) level and activity of guaiacol peroxidase, superoxide dismutase, catalase, ascorbate peroxidase and glutathione reductase were determined. The results showed that there was an early increase in the MDA level and in the guaiacol peroxidase activity more pronounced with copper exposure during almost all the time course of the experiment. The activity of superoxide dismutase and catalase was induced very early after cadmium and copper treatment, reached a maximal value after 12 h and then declined but it remained always slightly higher than the control at the end of the experiment. Ascorbate peroxidase activity pathway was similar to superoxide dismutase or catalase with a maximal activity after 48 h of heavy metal exposure. Induction of glutathione reductase activity observed only under copper exposure is maintained during almost all the experimental time. The antioxidative activity developed by tomato leaves is more induced by copper treatment. This can be related to the ability of this metal to induce more than cadmium an accumulation of reactive oxygen species (ROS) at the cellular level. Decline in the antioxidative enzymes activity at the end of the experiment can be a consequence of cadmium-and copper-inducing a further ROS formation that might affect enzymes activity.

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“…Tissue concentrations should not be used to evaluate the phytoremediation ability of species, because they do not take into consideration the whole plant biomass and metal concentration in the growth media (Ait Ali et al, 2002). The phytoextraction efficiency of plants depends on the amount of heavy metals accumulated in the above-ground plant parts and the plant yields (Deng et al, 2007).…”

Section: Variation In Phytoextraction Potentialmentioning

confidence: 99%

Variation in copper and zinc tolerance and accumulation in 12 willow clones: implications for phytoextraction

Yang

Wang

Zhao

et al. 2014

J. Zhejiang Univ. Sci. B

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Willows (Salix spp.) have shown high potential for the phytoextraction of heavy metals. This study compares variations in copper (Cu) and zinc (Zn) tolerance and accumulation potential among 12 willow clones grown in a nutrient solution treated with 50 μmol/L of Cu or Zn, respectively. The results showed differences in the tolerance and accumulation of Cu and Zn with respect to different species/clones. The biomass variation among clones in response to Cu or Zn exposure ranged from the stimulation of growth to inhibition, and all of the clones tested showed higher tolerance to Cu than to Zn. The clones exhibited less variation in Cu accumulation but larger variation in Zn accumulation. Based on translocation factors, it was found that most of the Cu was retained in the roots and that Zn was more mobile than Cu for all clones. It is concluded that most willow clones are good accumulators of Zn and Cu.

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Untitled

Cited by 219 publications

References 201 publications

Nickel Uptake and its Effect on Some Nutrient Levels, Amino Acid Contents and Oxidative Status in Matricaria chamomilla Plants

Nickel Uptake and its Effect on Some Nutrient Levels, Amino Acid Contents and Oxidative Status in Matricaria chamomilla Plants

Cadmium and copper induction of oxidative stress and antioxidative response in tomato (Solanum lycopersicon) leaves

Variation in copper and zinc tolerance and accumulation in 12 willow clones: implications for phytoextraction

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