Zinc reduces copper toxicity induced oxidative stress by promoting antioxidant defense in freshly grown aquatic duckweed Spirodela polyrhiza L.

Upadhyay, R. K.; Panda, Sanjib Kumar

doi:10.1016/j.jhazmat.2009.10.016

Cited by 101 publications

(33 citation statements)

References 27 publications

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“…The analysis of a one-way ANOVA showed that the differences in all the treatments were significant (P50:05) for G. densa. Similar results were found with S. polyrhiza (Upadhyay and Panda, 2009). Thus, increased MDA indicates the prevalence of oxidative stress and this may be one of the possible mechanisms by which toxicity due to Ni is manifested in plant tissues (Gupta et al, 2009).…”

Section: Effect Of Nickel On Lipid Peroxidationsupporting

confidence: 88%

Antioxidative parameters in the opposite-leaved pondweed (Gronlendia densa) in response to nickel stress

Yılmaz

Parlak

2011

Chemical Speciation & Bioavailability

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The process of stress adaption was studied in Groenlandia densa (opposite-leaved pondweed) grown in the presence of different Ni concentrations (0 -20 mg Ni L À 1 ). The results showed that Ni concentrations in plants increased with the increasing Ni supply levels and reached a maximum of 47.57 mg kg À 1 DW at 5 mg L À 1 Ni treatments. The level of photosynthetic pigments (Chl a, Chl b and Chl total) decreased only upon exposure to high Ni concentrations. However, total soluble proteins increased with increasing nickel supply levels. At the same time, the level of malondialdehyde (MDA) increased with increasing Ni concentration. Significant increases in antioxidant activities of studied enzymes such as superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione S-transferase (GST) and ascorbate peroxidase (APX) were recorded in this plant subjected to increasing Ni levels. Cellular antioxidant levels showed a decline suggesting a defensive mechanism to protect against oxidative stress caused by nickel. In addition, the proline content in G. densa increased with increasing nickel levels. These findings suggest that G. densa is equipped with efficient antioxidant mechanism against Ni-induced oxidative stress which protects photosynthetic machinery from damage.Our present study concluded that G. densa has a high level of nickel tolerance and accumulation. We also found that moderate nickel treatment (0.05 -5 mg L ) could cause an increasing generation of ROS, which was effectively scavenged by the antioxidative system. Therefore, G. densa may be used as a phytoremediator in moderately polluted aquatic ecosystems.

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Section: Effect Of Nickel On Lipid Peroxidationsupporting

confidence: 88%

Antioxidative parameters in the opposite-leaved pondweed (Gronlendia densa) in response to nickel stress

Yılmaz

Parlak

2011

Chemical Speciation & Bioavailability

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show abstract

“…Consequently, several families of heavy metal carriers involved in the intracellular balance of Cu and Zn have been discovered (Yruela 2009). The results determined based on the mineral profiles of root tissues and the results of Upadhyay & Panda (2010) confirm this statement. Under the conditions of the present study, Cu inhibited the trapping of Zn, and Zn in turn interfered with the Cu uptake process in a positive way (Figs.…”

Section: Resultssupporting

confidence: 64%

“…The observed responses could have resulted from the inhibition of cell division or to additive effects of micronutrients under the studied growth conditions (Kasim 2005, Upadhyay & Panda 2010. According to Fageria (2001), when the combination of nutrients results in growth responses smaller than the control, the interaction is negative.…”

Section: Resultsmentioning

confidence: 99%

“…Environmental stresses, both biotic and abiotic, promote the increased production of ROS such as H 2 O 2 , superoxide anion (O 2 -• ), and hydroxyl radical ( • OH) and the resulting accumulation in plants (Upadhyay & Panda 2010). ROS are considered toxic compounds that can lead to damaged biological molecules (e.g., DNA, RNA, and proteins) and cell membranes (e.g., lipid peroxidation) (Shi-Sheng 2007).…”

Section: Resultsmentioning

confidence: 99%

“…The distinct eff ects of Cu and Zn on plant metabolism have been widely studied, but little is known about the joint eff ects of these elements on physiological processes (Upadhyay & Panda 2010). Both elements occur simultaneously in contaminated soils and in irrigation water, and the interaction between the two can result in additive or synergic harmful eff ects (Kasim 2005).…”

Section: Introductionmentioning

confidence: 99%

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Zinc reduces copper toxicity induced oxidative stress by promoting antioxidant defense in freshly grown aquatic duckweed Spirodela polyrhiza L.

Cited by 101 publications

References 27 publications

Antioxidative parameters in the opposite-leaved pondweed (Gronlendia densa) in response to nickel stress

Antioxidative parameters in the opposite-leaved pondweed (Gronlendia densa) in response to nickel stress

Copper and zinc interactions: morphophysiological responses in sweet potato plants (Ipomoea batatas L.)

Heavy‐Metal‐Induced Oxidative Stress in Plants: Physiological and Molecular Perspectives

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