中国水稻科学2016，Vol.30Issue(4)：380-388,9.DOI:10.16819/j.1001-7216.2016.6031
不同镉浓度处理下水稻植株镉含量变化及其镉调控相关基因表达分析
Changes in Cadmium Concentration in Rice Plants Under Different Cadmium Levels and Expression Analysis of Genes Retated to Cadmium Regulation
摘要
Abstract
Using six indica and six japonica cultivars,differed in cadmium concentrations in the above-ground parts, the growth,heavy metal contents and expression levels of heavy metal transporter related genes were studied in a hydroponic experiment at six cadmium levels.Cadmium stress reduced plant height,shoot dry weight and chlorophyll content in rice leaves,inhibiting rice growth.Significant difference in cadmium content in rice roots and shoots among rice cultivars were found under different cadmium treatments,and the results showed that root-to-shoot translocation may be a key process that determine the difference in cadmium contents between rice cultivars and subspecies,while cadmium absorption by roots had little effect.At various cadmium levels (from 0.50 to 2.00 mg/kg),saturation of cadmium accumulation in rice shoots were found in some cultivars that cadmium content stopped increasing or even decreased.Besides,the expression levels of OsNRMAP1 ,OsIRT2 and OsNAS2 were significantly increased at such cadmium treatment,which might be attributed to the regulation of rice plants.关键词
水稻/镉/基因型/植株生长/基因表达Key words
rice/cadmium/genotype/plant growth/gene expression分类
农业科技引用本文复制引用
周全,王宏,张迎信,董青,孟帅,曹立勇,邵国胜,沈希宏..不同镉浓度处理下水稻植株镉含量变化及其镉调控相关基因表达分析[J].中国水稻科学,2016,30(4):380-388,9.基金项目
公益性行业(农业)科研专项(201403015) （农业）
国家自然科学基金资助项目(31571616) （31571616）
中国农业科学院(协同)创新工程资助项目 （协同）
国家863计划资助项目(2014AA10A603-15) （2014AA10A603-15）
