Record ID No. |
4370 |
Author(s) |
Doubková P., Sudová R. , 2014 |
Affiliation |
Institute of Botany, Academy of Sciences of the Czech Republic, 252 43 Průhonice, Czech Republic, Email: dbp@centrum.cz |
Title |
Nickel tolerance of serpentine and non-serpentine Knautia arvensis plants as affected by arbuscular mycorrhizal symbiosis |
Source. Vol.(no):Page |
Mycorrhiza 24(3): 209-217p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Soil toxicity |
Host |
Knautia arvensis |
Organism |
Arbuscular Mycorrhiza (AM) |
Country |
Czech Republic, Eastern Europe |
Abstracts |
Serpentine soils have naturally elevated concentrations of certain heavy metals, including nickel. This study addressed the role of plant origin (serpentine vs. non-serpentine) and symbiosis with arbuscular mycorrhizal fungi (AMF) in plant Ni tolerance. A semi-hydroponic experiment involving three levels of Ni and serpentine and non-serpentine AMF isolates and populations of a model plant species (Knautia arvensis) revealed considerable negative effects of elevated Ni availability on both plant and fungal performance. Plant growth response to Ni was independent of edaphic origin; however, higher Ni tolerance of serpentine plants was indicated by a smaller decline in the concentrations of photosynthetic pigments and restricted root-to-shoot Ni translocation. Serpentine plants also retained relatively more Mg in their roots, resulting in a higher shoot Ca/Mg ratio. AMF inoculation, especially with the non-serpentine isolate, further aggravated Ni toxicity to host plants. Therefore, AMF do not appear to be involved in Ni tolerance of serpentine K. arvensis plants. |