Nickel and copper tolerance and toxicity in three Tuscan populations of <i>Silene paradoxa</i>

Gonnelli, Cristina; Galardi, Francesca; Gabbrielli, R.

doi:10.1034/j.1399-3054.2001.1130409.x

Cited by 123 publications

(96 citation statements)

References 46 publications

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“…Increasing evidence suggests that Ni toxicity in plants is also associated with oxidative stress (Madhava Rao and Sresty 2000;Gajewska et al 2006;Boominathan and Doran 2002;Gonnelli et al 2001). Excessive Ni leads to significant increases in the concentration of hydroxyl radicals, superoxide anions, nitric oxide and hydrogen peroxide (Boominathan and Doran 2002;Stohs et al 2001;Hao et al 2006).…”

Section: Induction Of Oxidative Stressmentioning

confidence: 99%

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Occurrence, physiological responses and toxicity of nickel in plants

Sreekanth

Nagajyothi

Lee

et al. 2013

Int. J. Environ. Sci. Technol.

189

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The focus of the review is on the specific aspects of nickel's effects on growth, morphology, photosynthesis, mineral nutrition and enzyme activity of plants. The mobility of nickel in the environment and the consequent contamination in soil and water is of great concern. Also, the detrimental effects of excessive nickel on plant growth have been well known for many years. Toxic effects of nickel on plants include alterations in the germination process as well as in the growth of roots, stems and leaves. Total dry matter production and yield was significantly affected by nickel and also causes deleterious effects on plant physiological processes, such as photosynthesis, water relations and mineral nutrition. Nickel strongly influences metabolic reactions in plants and has the ability to generate reactive oxygen species which may cause oxidative stress. More recent evidence indicates that nickel is required in small amounts for normal plant growth and development. Hence, with the increasing level of nickel pollution in the environment, it is essential to understand the functional roles and toxic effects of nickel in plants.

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Section: Induction Of Oxidative Stressmentioning

confidence: 99%

“…enhanced MDA concentration (Pandolfini et al 1992). Moreover, Gonnelli et al (2001) (Dimkpa et al 2008). The decrease in water uptake was used as an indicator of Ni 2?…”

Section: Nickel Toxicity To Plantsmentioning

confidence: 99%

Occurrence, physiological responses and toxicity of nickel in plants

Sreekanth

Nagajyothi

Lee

et al. 2013

Int. J. Environ. Sci. Technol.

189

View full text Add to dashboard Cite

show abstract

“…This is remarkable as the photosynthetic apparatus is one of the major targets of metal phytotoxicity, typically resulting in severe symptoms such as chlorosis and necrosis, wilting, abnormal development and reduced growth (Pandey and Sharma, 2002;Rahman et al, 2005;Marschner and Marschner, 2012). These toxic effects are a product of numerous harmful interactions at the cellular level (Haydon and Cobbett, 2007), including nonspecific binding of metals to enzyme functional groups and displacement of other metals from their binding sites, generation of reactive oxygen species by redox-active metals that can lead to disruption of the electrontransport chain (Qadir et al, 2004), lipid peroxidation and subsequent impairment of membrane integrity (Pandolfini et al, 1992;Ros et al, 1992;Gonnelli et al, 2001;Haydon and Cobbett, 2007;Krämer, 2010;Hanikenne and Nouet, 2011).…”

Section: Metal Hyperaccumulation In Plantsmentioning

confidence: 99%

Evolution of nickel hyperaccumulation and serpentine adaptation in the Alyssum serpyllifolium species complex

et al. 2016

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Metal hyperaccumulation is an uncommon but highly distinctive adaptation found in certain plants that can grow on metalliferous soils. Here we review what is known about evolution of metal hyperaccumulation in plants and describe a population-genetic analysis of the Alyssum serpyllifolium (Brassicaceae) species complex that includes populations of nickelhyperaccumulating as well as non-accumulating plants growing on serpentine (S) and non-serpentine (NS) soils, respectively. To test whether the S and NS populations belong to the same or separate closely related species, we analysed genetic variation within and between four S and four NS populations from across the Iberian peninsula. Based on microsatellites, genetic variation was similar in S and NS populations (average H o = 0.48). The populations were significantly differentiated from each other (overall F ST = 0.23), and the degree of differentiation between S and NS populations was similar to that within these two groups. However, high S versus NS differentiation was observed in DNA polymorphism of two genes putatively involved in adaptation to serpentine environments, IREG1 and NRAMP4, whereas no such differentiation was found in a gene (ASIL1) not expected to play a specific role in ecological adaptation in A. serpyllifolium. These results indicate that S and NS populations belong to the same species and that nickel hyperaccumulation in A. serpyllifolium appears to represent a case of adaptation to growth on serpentine soils. Further functional and evolutionary genetic work in this system has the potential to significantly advance our understanding of the evolution of metal hyperaccumulation in plants.

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“…However, numerous evidences indicate that the Ni toxicity can be attributed also to oxidative stress at the cellular level (BACCOUCH et al, 2001;GONNELLI et al, 2001). Under stress conditions, including exposure to excessive concentrations of heavy metals, there is imbalance and removal of reactive oxygen species in plant tissues (GRATÃO et al, 2005;GRATÃO et al, 2008).…”

Section: Resultsmentioning

confidence: 99%