Observations placeholder

Assessment of arbuscular mycorrhizal fungi status and heavy metal accumulation characteristics of tree species in a lead-zinc mine area: potential applications for phytoremediation

Identifier

018311

Type of Spiritual Experience

Background

Robinia pseudoacacia, also known in its native territory as black locust

Populus is a genus of 25–35 species of deciduous flowering plants in the family Salicaceae, native to most of the Northern Hemisphere. English names variously applied to different species include poplar /, aspen, and cottonwood.

Cotinus coggygria, syn. Rhus cotinus (Eurasian smoketree, smoke tree, or smoke bush) is a species of flowering plant in the family Anacardiaceae, native to a large area from southern Europe, east across central Asia and the Himalayas to northern China.

A description of the experience

Environ Sci Pollut Res Int. 2015 Sep;22(17):13179-93. doi: 10.1007/s11356-015-4521-8. Epub 2015 May 2.

Assessment of arbuscular mycorrhizal fungi status and heavy metal accumulation characteristics of tree species in a lead-zinc mine area: potential applications for phytoremediation.

Yang Y1, Liang Y, Ghosh A, Song Y, Chen H, Tang M.

  • 1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Xianyang, Shaanxi, 712100, China.

Abstract

To select suitable tree species associated with arbuscular mycorrhizal fungi (AMF) for phytoremediation of heavy metal (HM) contaminated area, we measured the AMF status and heavy metal accumulation in plant tissues in a lead-zinc mine area, Northwest China.

All 15 tree species were colonized by AM fungi in our investigation. The mycorrhizal frequency (F%), mycorrhizal colonization intensity (M%) and spore density (SP) reduced concomitantly with increasing Pb and Zn levels; however, positive correlations were found between arbuscule density (A%) and soil total/DTPA-extractable Pb concentrations.

The average concentrations of Pb, Zn, Cu and Cd in plant samples were 168.21, 96.61, 41.06, and 0.79 mg/kg, respectively.

Populus purdomii Rehd. accumulated the highest concentrations of Zn (432.08 mg/kg) and Cu (140.85 mg/kg) in its leaves.

Considerable amount of Pb (712.37 mg/kg) and Cd (3.86 mg/kg) were concentrated in the roots of Robinia pseudoacacia Linn. and Populus simonii Carr., respectively.

Plants developed different strategies to survive in HM stress environment: translocating more essential metals (Zn and Cu) into the aerial parts, while retaining more toxic heavy metals (Pb and Cd) in the roots to protect the above-ground parts from damage.

According to the translocation factor (TF), bioconcentration factor (BCF), growth rate and biomass production, five tree species:

  • Ailanthus altissima (Mill.) Swingle,
  • Cotinus coggygria Scop.,
  • P. simonii, P. purdomii, and R. pseudoacacia

were considered to be the most suitable candidates for phytoextraction and/or phytostabilization purposes.

Redundancy analysis (RDA) showed that the efficiency of phytoremediation was enhanced by AM symbioses, and soil pH, Pb, Zn, and Cd levels were the main factors influencing the HM accumulation characteristics of plants.

PMID:

25929455

The source of the experience

PubMed

Concepts, symbols and science items

Concepts

Symbols

Science Items

Activities and commonsteps

Commonsteps

References