TY - JOUR
T1 - Survival strategies of plants associated with arbuscular mycorrhizal fungi on toxic mine tailings
AU - Leung, H. M.
AU - Ye, Z. H.
AU - Wong, M. H.
N1 - Funding Information:
The authors thank Mr. B. Yang of School of Life Science, Zhongshan University and Mr. WC Li of Hong Kong Baptist University for field assistance, the Hong Kong Herbarium, Agriculture, Fisheries and Conservation Department, for valuable advice on plant identification, and the Research Grants Council of Hong Kong (HKBU-CERG 2004-05-2145/04M) for financial support.
PY - 2007/1
Y1 - 2007/1
N2 - A field survey of metal concentrations and arbuscular mycorrhizal (AM) components of plants growing on five mining sites was conducted in Chenzhou City, Hunan Province, Southern China and a control site in Hong Kong. Significant differences were observed in the average concentrations of total heavy metals (Pb, Zn, Cu, Cd) and one metalloid (As) in contaminated soils compared with the control site. Gramineae and Compositae were the dominant plant families growing on mine tailings, with Chrysanthemum moritolium (common chrysanthemum), Cynodon dactylon (Bermuda grass), Miscanthus florodulus (Sword grass) and Pteris vittata (Ladder brake fern) commonly found at all sites. AM fungal colonization was detected in most of the plants. Comparing the four common plant species, three components of mycorrhizal colonization (arbuscules, vesicles and coiled hyphae) were found in the roots of C. dactylon and P. vittata growing at Do Shun Long (DSL) mine site. Concentrations of As in fronds were 24-fold higher than in roots of P. vittata with the highest mycorrhizal colonization rate (73%) among all sampling sites. Extensive mycorrhizal colonization (85%) was also recorded in the roots of C. dactylon with As accumulation 57 times higher than in shoots. The four common plants found in metal contaminated sites had developed different strategies for survival in the contaminated sites with the aid of indigenous AM fungi.
AB - A field survey of metal concentrations and arbuscular mycorrhizal (AM) components of plants growing on five mining sites was conducted in Chenzhou City, Hunan Province, Southern China and a control site in Hong Kong. Significant differences were observed in the average concentrations of total heavy metals (Pb, Zn, Cu, Cd) and one metalloid (As) in contaminated soils compared with the control site. Gramineae and Compositae were the dominant plant families growing on mine tailings, with Chrysanthemum moritolium (common chrysanthemum), Cynodon dactylon (Bermuda grass), Miscanthus florodulus (Sword grass) and Pteris vittata (Ladder brake fern) commonly found at all sites. AM fungal colonization was detected in most of the plants. Comparing the four common plant species, three components of mycorrhizal colonization (arbuscules, vesicles and coiled hyphae) were found in the roots of C. dactylon and P. vittata growing at Do Shun Long (DSL) mine site. Concentrations of As in fronds were 24-fold higher than in roots of P. vittata with the highest mycorrhizal colonization rate (73%) among all sampling sites. Extensive mycorrhizal colonization (85%) was also recorded in the roots of C. dactylon with As accumulation 57 times higher than in shoots. The four common plants found in metal contaminated sites had developed different strategies for survival in the contaminated sites with the aid of indigenous AM fungi.
KW - Arbuscular mycorrhiza
KW - Heavy metals
KW - Metal translocation factor
KW - Phytoremediation
UR - http://www.scopus.com/inward/record.url?scp=33751218856&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2006.06.037
DO - 10.1016/j.chemosphere.2006.06.037
M3 - Journal article
C2 - 16872660
AN - SCOPUS:33751218856
SN - 0045-6535
VL - 66
SP - 905
EP - 915
JO - Chemosphere
JF - Chemosphere
IS - 5
ER -