Differences in the effects of three arbuscular mycorrhizal fungal strains on P and Pb accumulation by maize plants |
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Authors: | Radka Sudová Miroslav Vosátka |
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Institution: | (1) Institute of Botany, Academy of Sciences of the Czech Republic, 252 43 Průhonice, Czech Republic |
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Abstract: | The effect of arbuscular mycorrhizal (AM) fungi on the accumulation and transport of lead was studied in a pot experiment
on maize plants grown in anthropogenically-polluted substrate. The plants remained uninoculated or were inoculated with different
Glomus intraradices isolates, either indigenous to the polluted substrate used or reference from non-polluted soil. A considerably lower tolerance
to the conditions of polluted substrate was observed for the reference isolate that showed significantly lower frequency of
root colonisation as well as arbuscule and vesicule abundance. Plants inoculated with the reference isolate also had significantly
lower shoot P concentrations than plants inoculated with the isolate from polluted substrate. Nevertheless, inoculation with
either indigenous or reference G. intraradices isolate resulted in higher shoot and root biomass and inoculated plants showed lower Pb concentrations in their shoots than
uninoculated plants, regardless of differences in root colonisation. Root biomass of maize plants was divided according to
AM-induced colouration into brightly yellow segments intensively colonised by AM fungus and non-colonised or only slightly
colonised whitish ones. Intensively colonised segments of the isolate from polluted substrate contained significantly higher
concentrations of phosphorus and lead than non-colonised ones, which suggest significant participation of fungal structures
in element accumulation.
Responsible Editor: Peter Christie. |
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Keywords: | Arbuscular mycorrhiza Heavy metals Pb-pollution Zea mays |
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