CHROMIUM RESISTANCE OF DANDELION (TARAXACUM PLATYPECIDUM DIELS.) AND BERMUDAGRASS (CYNODON DACTYLON [LINN.] PERS.) IS ENHANCED BY ARBUSCULAR MYCORRHIZA IN Cr(VI)-CONTAMINATED SOILS
文献类型: 外文期刊
第一作者: Wu, Song-Lin
作者: Wu, Song-Lin;Chen, Bao-Dong;Sun, Yu-Qing;Ren, Bai-Hui;Zhang, Xin;Wu, Song-Lin;Sun, Yu-Qing;Ren, Bai-Hui;Wang, You-Shan
作者机构:
关键词: Arbuscular mycorrhiza;Chromium;Metal toxicity;Bioavailability;Soil contamination
期刊名称:ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY ( 影响因子:3.742; 五年影响因子:3.866 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: In a greenhouse pot experiment, dandelion (Taraxacum platypecidum Diels.) and bermudagrass (Cynodon dactylon[Linn.] Pers.), inoculated with and without arbuscular mycorrhizal fungus (AMF) Rhizophagus irregularis, were grown in chromium (Cr)-amended soils (0 mg/kg, 5 mg/kg, 10 mg/kg, and 20 mg/kg Cr[VI]) to test whether arbuscular mycorrhizal (AM) symbiosis can improve Cr tolerance in different plant species. The experimental results indicated that the dry weights of both plant species were dramatically increased by AM symbiosis. Mycorrhizal colonization increased plant P concentrations and decreased Cr concentrations and Cr translocation from roots to shoots for dandelion; in contrast, mycorrhizal colonization decreased plant Cr concentrations without improvement of P nutrition in bermudagrass. Chromium speciation analysis revealed thatAMsymbiosis potentially altered Cr species and bioavailability in the rhizosphere. The study confirmed the protective effects of AMF on host plants under Cr contaminations. (c) 2014 SETAC
分类号: R99`X`R12
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