Bioconcentration of zinc and cadmium in ectomycorrhizal fungi and associated aspen trees as affected by level of pollution

Krpata, Doris; Fitz, Walter J.; Peintner, Ursula; Langer, Ingrid; Schweiger, Peter

doi:10.1016/j.envpol.2008.06.038

Cited by 31 publications

(14 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our study shows that higher Cd 2+ influx at the root tips of mycorrhizal plants results in higher Cd accumulation of all poplar tissues. Increased Cd accumulation in ectomycorrhizal fungi-colonized plants has been found in previous studies (Sell et al 2005;Baum et al 2006;Krpata et al 2008Krpata et al , 2009Sousa et al 2012). Induction of Cd accumulation by EMs in these plants has been mainly ascribed to (1) fungal exudates, for example oxalic acid, that enhance Cd bioavailability in the rhizosphere, (2) modified Cd 2+ mobility in the root apoplast due to the Hartig net, and (3) changes in hormonal balance or metabolites of host plants Sell et al 2005;Colpaert et al 2011;Osobova et al 2011;Langer et al 2012).…”

Section: Ems Improve Poplar Growth Nutrient and Carbohydrate Status mentioning

confidence: 62%

“…Accumulating evidence suggests that EMs can modify physiological and molecular responses of hosts to abiotic and biotic stresses including Cd stress Bellion et al 2006;Krznaric et al 2009;Luo et al 2009aLuo et al ,b, 2011Huang et al 2012;Mrnka et al 2012;Sousa et al 2012). EMs can result in elevated, decreased or unchanged Cd concentrations of host plants depending on host species and fungal isolates (Sell et al 2005;Baum et al 2006;Krpata et al 2009;Mrnka et al 2012;Sousa et al 2012).Therefore, choosing appropriate hosts and fungal partners is essential for remediation of Cd polluted soils.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ectomycorrhizas with Paxillus involutus enhance cadmium uptake and tolerance in Populus × canescens

Ma¹,

et al. 2013

Plant Cell & Environment

128

View full text Add to dashboard Cite

ABSTRACTuptake, transport and detoxification processes were increased in EMs compared to non-mycorrhizal roots. Higher CO2 assimilation, improved nutrient and carbohydrate status, and alleviated oxidative stress were found in mycorrhizal compared to non-mycorrhizal poplars despite higher Cd 2+ accumulation. These results indicate that mycorrhizas increase Cd 2+ uptake, probably by an enlarged root volume and overexpression of genes involved in Cd 2+ uptake and transport, and concurrently enhance Po. × canescens Cd tolerance by increased detoxification, improved nutrient and carbohydrate status and defence preparedness.

show abstract

Section: Ems Improve Poplar Growth Nutrient and Carbohydrate Status mentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Ectomycorrhizas with Paxillus involutus enhance cadmium uptake and tolerance in Populus × canescens

Ma¹,

et al. 2013

Plant Cell & Environment

128

View full text Add to dashboard Cite

show abstract

“…An important result was that EM roots exhibited higher Cd 2+ influx than NM roots irrespective of Cd 2+ stress conditions, shock, ST, and LT ( Figures 1A and 2 ). Substantial evidence indicates that Cd 2+ can be enriched in ectomycorrhizal plants (Sell et al, 2005; Baum et al, 2006; Krpata et al, 2008, 2009; Sousa et al, 2012; Ma Y. et al, 2014). The enhanced Cd 2+ uptake in EM roots is partly due to the capacity of the fungus to take up Cd 2+ because CdCl 2 shock resulted in a net Cd 2+ influx in the mycelia of the two P. involutus strains and the flux rate increased with the prolonged duration of CdCl 2 treatment from 24 h to 7 days ( Figures 1A and 2 ).…”

Section: Discussionmentioning

confidence: 99%

“…The genus Populus spp. is of particular interest for phytoremediation of Cd 2+ pollution (Sell et al, 2005; Krpata et al, 2008, 2009; Kieffer et al, 2009; He et al, 2011, 2013, 2015; Ma Y. et al, 2014), due to its widespread distribution, rapid growth, and genotypic differences in response to ion-specific stress (Chen and Polle, 2010; Polle et al, 2013; Chen et al, 2014; Polle and Chen, 2015). Populus tremula (Kieffer et al, 2009) and Populus × canescens (He et al, 2011) have been recently identified as woody Cd 2+ -hyperaccumulators.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Paxillus involutus-Facilitated Cd2+ Influx through Plasma Membrane Ca2+-Permeable Channels Is Stimulated by H2O2 and H+-ATPase in Ectomycorrhizal Populus × canescens under Cadmium Stress

Zhang

et al. 2017

Front. Plant Sci.

View full text Add to dashboard Cite

Using a Non-invasive Micro-test Technique, flux profiles of Cd2+, Ca2+, and H+ were investigated in axenically grown cultures of two strains of Paxillus involutus (MAJ and NAU), ectomycorrhizae formed by these fungi with the woody Cd2+-hyperaccumulator, Populus × canescens, and non-mycorrhizal (NM) roots. The influx of Cd2+ increased in fungal mycelia, NM and ectomycorrhizal (EM) roots upon a 40-min shock, after short-term (ST, 24 h), or long-term (LT, 7 days) exposure to a hydroponic environment of 50 μM CdCl2. Cd2+ treatments (shock, ST, and LT) decreased Ca2+ influx in NM and EM roots but led to an enhanced influx of Ca2+ in axenically grown EM cultures of the two P. involutus isolates. The susceptibility of Cd2+ flux to typical Ca2+ channel blockers (LaCl3, GdCl3, verapamil, and TEA) in fungal mycelia and poplar roots indicated that the Cd2+ entry occurred mainly through Ca2+-permeable channels in the plasma membrane (PM). Cd2+ treatment resulted in H2O2 production. H2O2 exposure accelerated the entry of Cd2+ and Ca2+ in NM and EM roots. Cd2+ further stimulated H+ pumping activity benefiting NM and EM roots to maintain an acidic environment, which favored the entry of Cd2+ across the PM. A scavenger of reactive oxygen species, DMTU, and an inhibitor of PM H+-ATPase, orthovanadate, decreased Ca2+ and Cd2+ influx in NM and EM roots, suggesting that the entry of Cd2+ through Ca2+-permeable channels is stimulated by H2O2 and H+ pumps. Compared to NM roots, EM roots exhibited higher Cd2+-fluxes under shock, ST, and LT Cd2+ treatments. We conclude that ectomycorrhizal P. × canescens roots retained a pronounced H2O2 production and a high H+-pumping activity, which activated PM Ca2+ channels and thus facilitated a high influx of Cd2+ under Cd2+ stress.

show abstract

Response of white mustard (Sinapis alba) and the soil microbial biomass to P and Zn addition in a greenhouse pot experiment

Khan

Joergensen

2015

J. Plant Nutr. Soil Sci.

View full text Add to dashboard Cite

show abstract

Bioconcentration of zinc and cadmium in ectomycorrhizal fungi and associated aspen trees as affected by level of pollution

Cited by 31 publications

References 42 publications

Ectomycorrhizas with Paxillus involutus enhance cadmium uptake and tolerance in Populus × canescens

Ectomycorrhizas with Paxillus involutus enhance cadmium uptake and tolerance in Populus × canescens

Paxillus involutus-Facilitated Cd2+ Influx through Plasma Membrane Ca2+-Permeable Channels Is Stimulated by H2O2 and H+-ATPase in Ectomycorrhizal Populus × canescens under Cadmium Stress

Response of white mustard (Sinapis alba) and the soil microbial biomass to P and Zn addition in a greenhouse pot experiment

Contact Info

Product

Resources

About