The effect of manganese supply on exudation of carboxylates by roots of lucerne (Medicago sativa)

Gherardi, M.J.; Rengel, Zdenko

doi:10.1023/b:plso.0000030182.11473.3b

Cited by 58 publications

(28 citation statements)

References 52 publications

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“…A deficiency of macro-and micronutrients in soil results in the exudation of carboxylates and phenols by plant roots. These compounds increase the biological assimilation of nutrient elements, unfortunately also increasing the bioavailability of heavy metals (Clemens et al 2002, Gherardi andRengel 2004). Another mechanism of bioavailability changes of heavy metals is the activity of soil microorganisms related to soil parameters (e.g.…”

Section: The Impact Of Various Factors On the Accumulation Of Heavy Mmentioning

confidence: 99%

Phytochemical properties and heavy metal accumulation in wheat grain after three years’ fertilization with biogas digestate and mineral waste

Różyło

Świeca

Gawlik‐Dziki

et al. 2017

AFSci

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Non-standard materials used for plant fertilization, require characterization to reduce any possible undesired effects. The aim of this study was to investigate the effect of fertilization with biogas digestate (BD) and mining waste (carboniferous mudstones (MS) from coal mine) on wheat yield quality and the bioaccumulation of heavy metals in wheat grains in relation to conventional fertilization (NPK) and no fertilization. Using the co-application of waste (MS+BD), the highest yield was obtained in the first and second year, but in the third year, a slight decrease in yield was observed compared to NPK. In all years, BD and MS+BD fertilization increased the content of protein, wet gluten, and phenols in wheat grain compared to NPK and no fertilization. Waste fertilization had a positive effect on the antioxidant capacity index of grain but only in the first year. The bioaccumulation index (BAI) demonstrated that NPK decreased BAI for Zn, B, Cd, and Mn, whereas MS+BD decreased BAI for Cu, Sr, Pb, Co, Ba, and Cr.

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Section: The Impact Of Various Factors On the Accumulation Of Heavy Mmentioning

confidence: 99%

Phytochemical properties and heavy metal accumulation in wheat grain after three years’ fertilization with biogas digestate and mineral waste

Różyło

Świeca

Gawlik‐Dziki

et al. 2017

AFSci

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“…Particularly low molecular weight organic anions (LMWOAs) such as citrate, malate and oxalate can play an important role in nutrient mobilization and metal detoxiWcation (Hinsinger 2001;Jones 1998;Ryan et al 2001). Recently it was suggested that citrate can be involved in mobilization of the micronutrient metal cations zinc (HoVland et al 2006) and manganese (Gherardi and Rengel 2004) from soil with low levels of these micronutrients. Characterizing the composition of rhizosphere soil solution with respect to LMWOAs and trace metal cations is therefore of utmost importance for a better understanding of plant functioning in adverse soil conditions.…”

Section: Introductionmentioning

confidence: 99%

In situ sampling of small volumes of soil solution using modified micro-suction cups

Shen

Hoffland

2007

Plant Soil

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Two modiWed designs of micro-porewater samplers were tested for their capacity to collect unbiased soil solution samples containing zinc and citrate. The samplers had either ceramic or polyethersulfone (PES) suction cups. Laboratory tests of the micro-samplers were conducted using (a) standard solutions with zinc and citrate concentrations that can be found in the rhizosphere and (b) two soils with contrasting texture. The results showed that both suction cups were inert with respect to citrate and zinc: they did not aVect the concentrations of the two ions in freshly prepared and directly sampled standard solutions. Both micro-suction cups removed most microorganisms by Wltration, though the PES cups were more eVective in this respect. This Wltering by the suction cups allowed for relatively accurate analysis of citrate in solutions containing microorganisms. These capacities, together with their small size and small dead volume, make the two micro-pore-water samplers highly suitable for sampling of rhizosphere soil solutions although further testing with other organic acids and trace metals may be needed.

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“…The physiological mechanisms that underlie Mn efficiency are not fully understood, but candidates include translocation to the seed (Khabez-Saberi and Graham, 2002), differences in uptake and compartmentation (Huang et al, 1994), improved acquisition of Mn from soil via root exudation (Gherardi and Rengel, 2004;Graham, 1988;Huang et al, 1994;Pearson and Rengel, 1997;Rengel, 1999) and favourable plant root interactions with Mn reducing microorganisms (Posta et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Genotypic differences in manganese efficiency: field experiments with␣winter barley (Hordeum vulgare L.)

Hebbern¹,

Pedas²,

Schjøerring³

et al. 2005

Plant Soil

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Eight different winter barley genotypes were grown in a plot experiment in northern Denmark, on soil where Mn deficiency had been previously demonstrated, to assess field performance and grain yield under two treatments: with foliar Mn fertilisation and without foliar Mn fertilisation. A high Mn efficiency was demonstrated for two of the genotypes and a low Mn efficiency was observed for one of the genotypes in three consecutive years; highly variable results were obtained for other genotypes. Mn efficiency based on grain yields could not be related to whole shoot Mn concentration, biomass or Mn uptake at various vegetative growth stages. Chlorophyll a fluorescence analysis was able to differentiate between the two Mn treatments up to 7 weeks after the last Mn application, whereas Mn concentrations, shoot biomass and Mn accumulation could not. It was not possible to fully alleviate Mn deficiency by repeated foliar spraying on the control plots. Given the growing conditions at the trial site and the low Mn in plant tissue, it is possible that Mn deficiency was extreme enough that Mn efficiency mechanisms broke down.Abbreviations: Mn -manganese; GS -growth stage; F o -minimum fluorescence; F m -maximum fluorescence; F v -variable fluorescence.

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The effect of manganese supply on exudation of carboxylates by roots of lucerne (Medicago sativa)

Cited by 58 publications

References 52 publications

Phytochemical properties and heavy metal accumulation in wheat grain after three years’ fertilization with biogas digestate and mineral waste

Phytochemical properties and heavy metal accumulation in wheat grain after three years’ fertilization with biogas digestate and mineral waste

In situ sampling of small volumes of soil solution using modified micro-suction cups

Genotypic differences in manganese efficiency: field experiments with␣winter barley (Hordeum vulgare L.)

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