TY - JOUR
T1 - Influence of arbuscular mycorrhizal fungi (AMF) on zinc biogeochemistry in the rhizosphere of Lindenbergia philippensis growing in zinc-contaminated sediment
AU - Kangwankraiphaisan, Thanchanok
AU - Suntornvongsagul, Kallaya
AU - Sihanonth, Prakitsin
AU - Klysubun, Wantana
AU - Gadd, Geoffrey Michael
PY - 2013
Y1 - 2013
N2 - The association of arbuscular mycorrhizal fungi (AMF) with the roots of Lindenbergia philippensis (Cham.) Benth., sampled from a Zn-contaminated settling pond at a zinc smelter, significantly enhanced Zn accumulation (72,540 ± 5,092 mg kg dry weight) in rhizosphere sediment amended with 1,000 mg L of Zn sulfate solution compared to fungicide-treatments that suppressed AMF colonization. This can be explained by a significant proportion of Zn being found in rectangular crystals that were associated with the root mucilaginous sheath. Despite this, all treatments maintained the same Zn coordination geometry in both Zn oxidation state and the coordinated neighbouring atoms. X-ray absorption spectroscopy (XAS) showed a Zn(II) oxidation state as a core atom and associated with six oxygen atoms symmetrically arranged in an octahedral coordination and coordinated with sulfur. The results may indicate a role for AMF in enhancing Zn immobilization in the rhizosphere of indigenous plants that successfully colonize Zn mining and smelting disposal sites.
AB - The association of arbuscular mycorrhizal fungi (AMF) with the roots of Lindenbergia philippensis (Cham.) Benth., sampled from a Zn-contaminated settling pond at a zinc smelter, significantly enhanced Zn accumulation (72,540 ± 5,092 mg kg dry weight) in rhizosphere sediment amended with 1,000 mg L of Zn sulfate solution compared to fungicide-treatments that suppressed AMF colonization. This can be explained by a significant proportion of Zn being found in rectangular crystals that were associated with the root mucilaginous sheath. Despite this, all treatments maintained the same Zn coordination geometry in both Zn oxidation state and the coordinated neighbouring atoms. X-ray absorption spectroscopy (XAS) showed a Zn(II) oxidation state as a core atom and associated with six oxygen atoms symmetrically arranged in an octahedral coordination and coordinated with sulfur. The results may indicate a role for AMF in enhancing Zn immobilization in the rhizosphere of indigenous plants that successfully colonize Zn mining and smelting disposal sites.
UR - http://www.scopus.com/inward/record.url?scp=84879219536&partnerID=8YFLogxK
U2 - 10.1007/s10534-013-9634-2
DO - 10.1007/s10534-013-9634-2
M3 - Article
C2 - 23690075
AN - SCOPUS:84879219536
SN - 0966-0844
VL - 26
SP - 489
EP - 505
JO - BioMetals
JF - BioMetals
IS - 3
ER -