Effects of elevated CO_2 levels on root morphological traits and Cd uptakes of two Lolium species under Cd stress

作     者：Yan JIA Shi-rong TANG Xue-hai JU Li-na SHU Shu-xing TU Ren-wei FENG Lorenzino GIUSTI 

作者机构：Centre for Research in Ecotoxicology and Environmental Remediation Agro-environmental Protection Institute Ministry of Agriculture Tianjin 300191 China Open Key Laboratory of Agro-environment and Food Safety of Ministry of Agriculture Tianjin 300191 China College of Resources and Environment Huazhong Agricultural University Wuhan 430070 China Faculty of Health and Life Sciences University of the West of England Coldharbour Lane Bristol BS16 1Q Y UK 

出 版 物：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 (浙江大学学报（英文版）B辑（生物医学与生物技术）)

年 卷 期：2011年第12卷第4期

页      面：313-325页

核心收录：

学科分类：083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：Project supported by the Central Public Research Institute Basic Fund for Research and Development (2008-jxh-1) Agro-environmental Protection Institute Ministry of Agriculture China 

主　　题：Elevated CO2 levels Lofium multiflorum Lam. Lolium perenne L. Root morphology Cd uptake Cd stress 

摘      要：This study was conducted to investigate the combined effects of elevated CO2 levels and cadmium (Cd) on the root morphological traits and Cd accumulation in Lolium multiflorum *** Lolium perenne *** to two CO2 levels (360 and 1000 μl/L) and three Cd levels (0,4,and 16 mg/L) under hydroponic *** results show that elevated levels of CO2 increased shoot biomass more,compared to root biomass,but decreased Cd concentrations in all plant *** exposure caused toxicity to both Lolium species,as shown by the restrictions of the root morphological parameters including root length,surface area,volume,and tip *** parameters were significantly higher under elevated levels of CO2 than under ambient CO2,especially for the number of fine *** increases in magnitudes of those parameters triggered by elevated levels of CO2 under Cd stress were more than those under non-Cd stress,suggesting an ameliorated Cd stress under elevated levels of *** total Cd uptake per pot,calculated on the basis of biomass,was significantly greater under elevated levels of CO2 than under ambient *** Cd toxicity,decreased Cd concentration,and altered root morphological traits in both Lolium species under elevated levels of CO2 may have implications in food safety and phytoremediation.