博士研究生李中阳同学发表高影响因子论文

近日，我所招收的博士研究生李中阳同学在其导师唐世荣研究员的指导下撰写的文章“Contrasting effects of elevated CO₂ on Cu and Cd uptake by different rice varieties grown on contaminated soils with two levels of metals: implication for phytoextraction and food safety”（CO₂ 浓度升高条件下不同品种水稻对Cu 和Cd 吸收的差异性对比研究--植物修复和食品安全方面的含义）被《Journal of hazardous materials》（中文译名《危险物质杂志》）杂志（2008年度SCI影响因子2.975）录用，论文第一作者和通讯作者单位为农业部环境保护科研监测所。

本论文围绕国家自然科学基金项目（No. 20477035）和中央级公益性科研院所基本科研业务费专项资金的内容开展研究，发现（1）CO₂ 浓度升高显著增加六种水稻的生物量；（2）水稻中重金属镉的含量与品种关系很大。六种水稻品种中，有三种水稻品种的Cd 含量增加显著，另三种水稻品种的Cd 含量降低显著，彰显开展农作物适应全球气候变化研究的重要性；（3）生物量以及重金属吸收量显著增加的品种显示出较大的植物修复潜力。根据目前对全球CO₂ 浓度升高的预测，CO₂ 浓度升高诱导水稻品种对Cd的超量吸收将通过食物链威胁人类的健康。研究还表明，CO₂ 浓度升高条件下Cd 所造成的威胁要比Cu 更为严重（张长波供稿）。

Abstract: A pot experiment in six open-top chambers with two levels of CO₂ and two multi-metal contaminated soils was conducted to investigate combined effects of elevated CO₂ levels and metals (Cu and Cd) on rice.  Elevated CO₂ significantly increased the total dry weight biomass of six Chinese rice by 20 to 108% and 32 to 142% for low and high levels of contaminated soils, respectively. We observed dilution/little varied phenomena in grain Cu concentration in six rice varieties grown on both contaminated soils under elevated CO₂.  We found significantly higher Cd concentrations in the parts of three rice varieties under elevated CO₂, but lower levels for the others.  Two major conclusions can be drawn from our study: 1) Rice varieties with significantly increased biomass and metal uptake under elevated CO₂ exhibit greater potential for phytoextraction; 2) Given expected global increases in CO₂ concentration, CO₂-induced accumulation of metals in rice might be a component contributing to the potential health risk in the future, with Cd being a more important threat to human health than Cu.

（生态毒理与环境修复中心 供稿）