Antioxidative and Metal-Chelating Effects of Polyamines

Løvaas, Erik

doi:10.1016/s1054-3589(08)60982-5

Cited by 116 publications

(98 citation statements)

References 142 publications

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“…Given that AL35 also exhibited a very high survival rate (75%), its capacity to synthesize and accumulate large amounts of Put likely contributed to its tolerance to HMs. It has been suggested that PAs may protect the plant through reduction of oxidative damage/lipid peroxidation by free radical scavenging and even metal chelation (Groppa & Benavides 2008, Lovaas 1997, Sharma & Dietz 2006.…”

Section: Field Screening Of Tolerant Poplar Clonesmentioning

confidence: 99%

Arbuscular mycorrhizal fungi as a tool to ameliorate the phytoremediation potential of poplar: biochemical and molecular aspects

Cicatelli¹,

Torrigiani²,

Todeschini³

et al. 2014

iForest

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© iForest -Biogeosciences and Forestry IntroductionMany large areas around the world are contaminated with heavy metals (HMs) and/or organic compounds; most of these have not been remediated due to the high cost and technical drawbacks of currently available technologies. HMs tend to accumulate in soils and aquatic sediments and can enter the food chain leading to the biomagnification phenomenon thereby representing a risk to the environment and to human health (Clijsters et al. 1999). Some essential elements, such as copper (Cu) and zinc (Zn), may be present in soils and waters at potentially toxic levels mainly as a result of agricultural and industrial practices (Ali et al. 2004).Alternative techniques for the clean-up of polluted soil and water, such as the cost-effective and less disruptive phytoremediation, have gained acceptance in recent years (Pilon-Smits 2005, Thewys et al. 2010. Trees have been suggested as suitable for phytoremediation due to their high biomass production (Dickinson & Pulford 2005) and because tree plantations can be multi-purpose (Tognetti et al. 2013). Poplar has many characteristics suitable for phytoremediation: a fast rate of growth, a deep and wide-spreading root system and a metal-resistance trait (Aronsson & Perttu 2001, Di Baccio et al. 2011, Punshon & Dickinson 1997, Sebastiani et al. 2004). In Italy, P. alba (white poplar) and P. nigra (black poplar) populations of the Ticino river valley constitute a hotspot of biodiversity (Castiglione et al. 2009, Fossati et al. 2004. Their genetic variability is being exploited for the selection of genotypes having interesting traits, such as tolerance to pollutants. The remarkable clonal variability of poplar allows to identify genotypes with a greater ability to accumulate/tolerate pollutants including heavy metals , Kopponen et al. 2001, Laureysens et al. 2004, Punshon & Dickinson 1997, Zalesny et al. 2005. Finally, poplar offers the advantage that, being the first "model tree species" whose genome has been sequenced (Tuskan et al. 2004), physiological and molecular mechanisms at the basis of metal tolerance can be more easily investigated at the transcriptomic level (Di Baccio et al. 2011).Plant symbiotic fungi, such as mycorrhizae, and soil bacteria can confer increased tolerance to stress (Gamalero et al. 2009). Arbuscular mycorrhizal fungi (AMF) form associations with the roots of the vast majority of land plants; the fungus colonizes the roots and forms arbuscules within root cortical cells thus improving plant nutrient uptake, especially phosphorus (Smith & Read 1997). Moreover, increasing evidence shows that symbiotic fungi contribute to plant adaptation to multiple biotic and abiotic stresses (Gohre & Paszkowski 2006, Lebeau et al. 2008, Lingua et al. 2002, Liu et al. 2007, Rodriguez & Redman 2008, Smith et al. 2010). In the case of HMs, the beneficial ef- Poplar is a suitable species for phytoremediation, able to tolerate high concentrations of heavy metals (HMs). Arbuscular mycorrhizal fungi (AMF) form symbiotic associatio...

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Section: Field Screening Of Tolerant Poplar Clonesmentioning

confidence: 99%

Arbuscular mycorrhizal fungi as a tool to ameliorate the phytoremediation potential of poplar: biochemical and molecular aspects

Cicatelli¹,

Torrigiani²,

Todeschini³

et al. 2014

iForest

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“…A maternal store of polyamines exists in the embryo, and these residual polyamines may be sufficient for normal DNA synthesis at this stage. Otherwise, polyamines may not be necessary for DNA synthesis, although the stabilization of DNA by polyamines (Lovaas 1997) and polyamine stimulation of ligation of Okazaki fragments (Pohjanpelto & Hölttä 1996) have been reported. Amd1 -/-blastocysts died at the early stage of gastrulation.…”

Section: Amd1mentioning

confidence: 99%

Essential role of S‐adenosylmethionine decarboxylase in mouse embryonic development

et al. 2002

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“…Harmful effects of Cu metal are mediated via formation of free radicals (Luna et al, 1994) and by the catalysis of the Haber-Weiss reaction (Halliwel and Gutteridge, 1984). These free radicals are very toxic and oxidize biological macromolecules such as nucleic acids, proteins and lipids, thereby disturbing the cell stability and membrane permeability (Lovaas, 1997;Schutzendubel and Polle, 2002).…”

Section: Introductionmentioning

confidence: 99%

Epibrassinolide regulated synthesis of polyamines and auxins in Raphanus sativus L. seedlings under Cu metal stress

Pal

Bhardwaj

Gupta³

et al. 2009

Braz. J. Plant Physiol.

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The effects of various conc of (10 -11 , 10 -9 and 10 -7 M) 24-epibrassinolide (24-epiBL) on polyamines and auxins contents was analyzed in 7days old seedlings of Raphanus sativus L. cv. Pusa chetki under copper metal stress. Cu metal (0.2mM) treatment significantly increased endogenous levels of putrescine, spermidine and spermine when compared with control values. Cadaverine content got decreased under metal stress. Endogenous polyamines showed varying levels in seedlings when applying 24-epiBL treatment only. Maximum increase was found in putrescine, cadaverine and spermidine in 10 -11 , 10 -9 and 10 -7 M conc of 24-epiBL respectively when applied alone to R. sativus seedlings. However, metal treatment supplemented with 24-epiBL revealed small increase in polyamines. Putrescine and cadaverine got enhanced in combination of Cu metal and 10 -7 M (24-epiBL) in comparison to metal treatment alone, whereas decrease in spermidine and spermine levels were recorded in combinations of Cu metal and 10 -9 and 10 -7 M 24-epiBL respectively. Endogenous contents of Indole-3-acetic acid (IAA) and Naphthalene acetic acid (NAA) were significantly affected by 24-epiBL when applied alone or along with Cu metal. Both free and bound forms of NAA were not detected in untreated seedlings, but were recorded in seedlings treated with metal stress. Decreased IAA contents observed in metal treatment got enhanced significantly in seedlings with 24-epiBL supplementation. To the best of our knowledge the present investigation is the first one to explain the effects of 24-epiBL on endogenous contents of polyamines, indole acetic acid and naphthalene acetic acid under copper metal stress.

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Antioxidative and Metal-Chelating Effects of Polyamines

Cited by 116 publications

References 142 publications

Arbuscular mycorrhizal fungi as a tool to ameliorate the phytoremediation potential of poplar: biochemical and molecular aspects

Arbuscular mycorrhizal fungi as a tool to ameliorate the phytoremediation potential of poplar: biochemical and molecular aspects

Essential role of S‐adenosylmethionine decarboxylase in mouse embryonic development

Epibrassinolide regulated synthesis of polyamines and auxins in Raphanus sativus L. seedlings under Cu metal stress

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