期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 13, 期 3, 页码 233-243出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226511003671387
关键词
Neotyphodium; Cd; heavy metal accumulation; phytoextraction efficiency
资金
- National Key Basic Research Special Foundation [2007CB106802]
- National Natural Science Foundation [30970460, 30770348]
- Doctoral Program Foundation of Institutions of Higher Education of China [20060055012]
- Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry
The effect of endophyte infection on plant growth, cadmium (Cd) uptake, and Cd translocation was investigated using tall fescue (Lolium arundinaceum) grown in greenhouses in contaminated solution. Endophyte infection significantly increased tiller number and biomass of the host grass under both control and Cd-stress conditions. Endophyte infection not only enhanced Cd accumulation in tall fescue, but also improved Cd transport from the root to the shoot. Under 20 mg L-1 Cd stress, the phytoextraction efficiency of endophyte-infected (EI) tall fescue was 2.41-fold higher than endophyte-free plants. Although the total Cd accumulation in EI tall fescue was insufficient for practical phytoextraction applications, the observed high biomass production and tolerance of stress from abiotic factors including heavy metals, gives endophyte/plant associations the potential to be a model for endophyte-assisted phytoremediation of metal-polluted soils.
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