TY - JOUR
T1 - Arbuscular mycorrhizal fungi influence the accumulation and partitioning of Cd and P in bashfulgrass (Mimosa pudica L.) grown on a moderately Cd-contaminated soil
AU - Hu, Junli
AU - Wang, Hongsheng
AU - Wu, Fuyong
AU - Wu, Shengchun
AU - Cao, Zhihong
AU - Lin, Xiangui
AU - Wong, Ming Hung
N1 - Funding Information:
We wish to acknowledge Prof. Zhihong Ye, Dr. Jintian Li, Dr. Bing Li, Mr. Zhiyun Dai, and Mr. Xun Wang of Sun Yat-sen University, for their assistance in field sampling, and Mr. King Wai Chan, and Dr. Ho Man Leung of Hong Kong Baptist University, for their assistance in greenhouse experiment and sample analyses. This paper was presented at 1st International Conference on Contaminated Land, Ecological Assessment and Remediation held in Zhejiang A & F University, Lin’an, Hangzhou, Zhejiang, China from 4 to 8 November, 2012. We are also grateful to Ms. Sue Fung and the anonymous reviewers, for their useful comments and suggestions on manuscript revision and English editing. This work was supported by the General Research Fund ( HKBU 261510 ) and the Special Equipment Grant ( SEG HKBU09 ) of the Research Grants Council of the University Grants Committee, Hong Kong , and the Mini-AoE (Area of Excellence) Fund ( RC/AOE/08-09/01 ) of Hong Kong Baptist University.
PY - 2014/1
Y1 - 2014/1
N2 - The presence of heavy metals (HMs) at high concentrations is one of the major issues encountered with the direct usage of medicinal plants (MPs). Although arbuscular mycorrhizal (AM) fungal inoculations have been suggested for safe crop productions on HM-contaminated soils, the variations in both plant and fungal capabilities may contribute to differing outcomes of symbioses involving different combinations of the two. Therefore, a 14-week pot experiment was conducted to investigate cadmium (Cd) and phosphorus (P) acquisitions by bashfulgrass (Mimosa pudica L.) from a Cd-contaminated (1.6mgkg-1) soil in response to inoculations of two different AM fungal species, Glomus caledonium (Gc) and Glomus versiforme (Gv). Root mycorrhizal colonization, shoot and root biomasses, and Cd and P concentrations of bashfulgrass, as well as soil pH, acid phosphatase activity, and available Cd and P concentrations, were determined. Compared with the non-inoculated control, both Gc and Gv inoculations significantly increased (P<0.05) root mycorrhizal colonization rates and soil acid phosphatase activities. However, only Gc inoculation significantly increased (P<0.05) soil available P concentration, plant P acquisition and shoot biomass of bashfulgrass, while Gv inoculation significantly decreased (P<0.05) P translocation efficiency and increased (P<0.05) root P concentration. In addition, both Gc and Gv inoculations had no significant effects on plant Cd translocation efficiencies, but significantly elevated (P<0.05) soil pH and decreased (P<0.05) soil DTPA-extractable (phytoavailable) Cd concentrations, plant Cd acquisitions and tissue Cd concentrations of bashfulgrass. The results indicated differential responses of bashfulgrass in accumulations and translocations of Cd and P according to different AM fungal species, and demonstrated the potential application of AM fungi in the production of MPs on Cd-contaminated soils.
AB - The presence of heavy metals (HMs) at high concentrations is one of the major issues encountered with the direct usage of medicinal plants (MPs). Although arbuscular mycorrhizal (AM) fungal inoculations have been suggested for safe crop productions on HM-contaminated soils, the variations in both plant and fungal capabilities may contribute to differing outcomes of symbioses involving different combinations of the two. Therefore, a 14-week pot experiment was conducted to investigate cadmium (Cd) and phosphorus (P) acquisitions by bashfulgrass (Mimosa pudica L.) from a Cd-contaminated (1.6mgkg-1) soil in response to inoculations of two different AM fungal species, Glomus caledonium (Gc) and Glomus versiforme (Gv). Root mycorrhizal colonization, shoot and root biomasses, and Cd and P concentrations of bashfulgrass, as well as soil pH, acid phosphatase activity, and available Cd and P concentrations, were determined. Compared with the non-inoculated control, both Gc and Gv inoculations significantly increased (P<0.05) root mycorrhizal colonization rates and soil acid phosphatase activities. However, only Gc inoculation significantly increased (P<0.05) soil available P concentration, plant P acquisition and shoot biomass of bashfulgrass, while Gv inoculation significantly decreased (P<0.05) P translocation efficiency and increased (P<0.05) root P concentration. In addition, both Gc and Gv inoculations had no significant effects on plant Cd translocation efficiencies, but significantly elevated (P<0.05) soil pH and decreased (P<0.05) soil DTPA-extractable (phytoavailable) Cd concentrations, plant Cd acquisitions and tissue Cd concentrations of bashfulgrass. The results indicated differential responses of bashfulgrass in accumulations and translocations of Cd and P according to different AM fungal species, and demonstrated the potential application of AM fungi in the production of MPs on Cd-contaminated soils.
KW - Glomus caledonium
KW - Glomus versiforme
KW - Medicinal plant
KW - Metal stabilization
KW - Soil acid phosphatase
KW - Soil DTPA-extractable Cd
UR - http://www.scopus.com/inward/record.url?scp=84884199882&partnerID=8YFLogxK
U2 - 10.1016/j.apsoil.2013.08.010
DO - 10.1016/j.apsoil.2013.08.010
M3 - Journal article
AN - SCOPUS:84884199882
SN - 0929-1393
VL - 73
SP - 51
EP - 57
JO - Applied Soil Ecology
JF - Applied Soil Ecology
ER -