Modulation of polyamine balance in Lotus glaber by salinity and arbuscular mycorrhiza

Sannazzaro, Analía Inés; Echeverría, Mariela; Albertó, Edgardo; Ruíz, Oscar Adolfo; Menéndez, Ana

doi:10.1016/j.plaphy.2006.12.008

Cited by 128 publications

(71 citation statements)

References 45 publications

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“…As a result of PaSPDS upregulation, free Spd titres were higher in the presence than in the absence of AMF and correlated with improved plant growth; conjugated Spd and Spm levels were also dramatically enhanced in plants inoculated with G. intraradices relative to uninoculated controls. Although enhanced Put titres seem to be the common physiological response to HM stress (Castiglione et al 2009, Groppa & Benavides 2008, Lei et al 2007), the accumulation of the higher PAs Spd and Spm seems to be typical of mycorrhizal plants grown under abiotic stress (Sannazzaro et al 2007). The positive role of PAs, especially Spd and Spm, possibly relies on their polycationic nature allowing a high biological activity (Hanfrey et al 2002), such as binding with charged macromolecules.…”

Section: Plant Pa Metabolism Positively Responds To Mycorrhizationmentioning

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: Plant Pa Metabolism Positively Responds To Mycorrhizationmentioning

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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“…However, mycorrhization was found to increase the fitness of the host plant by enhancing its growth and biomass. Several researchers have reported that AMF-inoculated plants grow better than non-inoculated plants under salt stress (Al-Karaki, 2000;Cantrell and Linderman, 2001;Giri et al, 2003;Sannazzaro et al, 2007;Zuccarini and Okurowska, 2008). It has been reported that mycorrhizal treated Poncirus trifoliata seedlings exhibited significantly higher dry biomass in saline soil as compared to non-AMF seedlings.…”

Section: Plant Growth and Biomassmentioning

confidence: 99%

Arbuscular mycorrhizal symbiosis and alleviation of salinity stress

Aggarwal

Kadian

Karishma

et al. 2012

JANS

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Several environmental factors adversely affect plant growth and development and final yield performance of a crop. Drought, salinity, nutrient imbalances (including mineral toxicities and deficiencies) and extremes of temperature are among the major environmental constraints to crop productivity worldwide. Development of crop plants with stress tolerance, however, requires, among others, knowledge of the physiological mechanisms and genetic controls of the contributing traits at different plant developmental stages. In the past two decades, biotechnology research has provided considerable insights into the mechanism of biotic stress tolerance in plants at the molecular level. Furthermore, different abiotic stress factors may provoke osmotic stress, oxidative stress and protein denaturation in plants, which lead to similar cellular adaptive responses such as accumulation of compatible solutes, induction of stress proteins, and acceleration of reactive oxygen species scavenging systems. Recently, various methods are adapted to improve plant tolerance to salinity injury through either chemical treatments (plant hormones, minerals, amino acids, quaternary ammonium compounds, polyamines and vitamins) or biofertilizers treatments (Asymbiotic nitrogen-fixing bacteria, symbiotic nitrogen-fixing bacteria) or enhanced a process used naturally by plants (mycorrhiza) to minimise the movement of Na+ to the shoot. Proper management of Arbuscular Mycorrhizal Fungi (AMF) has the potential to improve the profitability and sustainability of salt tolerance. In this review article, the discussion is restricted to the mycorrhizal symbiosis and alleviation of salinity stress.

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“…The reduction of alfalfa growth following NaCl addition has been widely argued in the literature [55,59,69,71,72]. Studies performed on other species, under saline conditions, show that the growth inhibition is due to a nutrient uptake alteration [33,73,74] or to a toxic Na and Cl intracellular concentration occurring in the stressed plants [75].…”

mentioning

confidence: 98%

Alfalfa (Medicago sativa L.) clones tolerant to salt stress: in vitro selection

et al. 2013

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In order to quickly and efficiently evaluate the salt tolerance of alfalfa, salinity tests were conducted on Medicago sativa L. var. australis, var. icon, var. loi, and var. gea, under in vitro conditions. Pregerminated seeds of four varieties were subjected to five different NaCl concentrations (0, 50, 100, 150, 200 mM). The influence of saline stress was estimated on the basis of survival percentage, growth parameters, and electrolyte leakage. The seedlings surviving on the medium enriched with salt at the highest concentration were presumed to be tolerant and represented the mother plants for the production of in vitro clones. In the following step, the clones were evaluated in vitro to confirm the salt tolerance. The influence of mild salt stress (75 mM NaCl) on the growth parameters of selected clones was examined. At the end of this trial, the proline accumulation and sodium content in alfalfa shoots were also quantified. The results suggest an increased level of proline promotes salt tolerance. Medicago sativa L. var. icon is highly tolerant in comparison with the other varieties tested. In vitro selection of M. sativa L. varieties on salt-containing media allowed us to obtain clones with increased salinity tolerance.

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Modulation of polyamine balance in Lotus glaber by salinity and arbuscular mycorrhiza

Cited by 128 publications

References 45 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

Arbuscular mycorrhizal symbiosis and alleviation of salinity stress

Alfalfa (Medicago sativa L.) clones tolerant to salt stress: in vitro selection

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