Cadmium phytoextraction capacity in eight C3herbage grass species
Cadmium phytoextraction capacity in eight C3herbage grass species
复制标题
DOI：
10.1111/j.1744-697x.2008.00101.x
复制
发表时间：
2008-03
影响因子：
1.3
通讯作者：
S. Sabreen;S. Sugiyama
中科院分区：
文献类型：
--
作者：
S. Sabreen;S. Sugiyama
禾本科植物具有生物量大、适应性强、管理成本低等特点，是植物修复的理想选择。本研究旨在评估镉（Cd）植物提取能力的种间变异，在8个禾草品种。以30 d龄的剪股颖、黄花茅、鸭茅、高羊茅、草地羊茅、多花黑麦草、多年生黑麦草和草地早熟禾为材料，在不同浓度的Cd（0、5、10和50 μM）溶液中水培15 d。对于每个物种，地上部生物量，生长抑制的比例（GI，%），地上部镉的浓度和积累，地上部养分吸收，和营养矿物质的吸收抑制的比例（UI，%）进行了评估。镉的影响包括生长发育受阻。随着Cd浓度的增加，GI从5%增加到70%。对于所有Cd处理，L. multiflorum表现出最高的地上部干生物量。地上部Cd浓度对矿质营养吸收有负面影响。最高镉处理引起的各种元素的UI为37- 95%。在50 μM Cd处理下，不同物种间Cd积累量差异达20倍，L.黄花菜对Cd的积累量最高，为116.46 μg/株。结果表明，L.在禾本科植物中，多花黑麦草表现出较高的Cd耐性和Cd提取能力。
Grasses are excellent candidates for phytoremediation because of their high biomass production, high adaptability and low management cost. This study assesses interspecific variation of cadmium (Cd) phytoextraction capabilities in eight C₃ grass species. Populations of 30-day-old C₃ grass species - namely, Agrostis alba, Anthoxanthum odoratum, Dactylis glomerata, Festuca arundinacea, Festuca pratensis, Lolium multiflorum, Lolium perenne and Poa pratensis- were grown hydroponically for 15 days with different concentrations of Cd (0, 5, 10 and 50 μM). For each species, shoot biomass, the proportion of growth inhibition (GI, %), shoot Cd concentration and accumulation, shoot nutrient uptake, and the proportion of uptake inhibition (UI, %) of nutrient minerals were evaluated. Effects of Cd application included stunted growth. The GI increased from 5% to 70% with an increase in Cd concentrations. For all Cd treatments, L. multiflorum showed the highest shoot dry biomass. Shoot Cd concentrations negatively affected mineral nutrient uptake. The highest Cd treatment caused UI of various elements of 37-95%. Under 50-μM Cd treatment, Cd accumulation varied by 20 times among species, and L. multiflorum showed the highest Cd accumulation (116.46 μg plant⁻¹). Our results indicate that L. multiflorum exhibited high degrees of both Cd tolerance and Cd phytoextraction capacity among grass species.