农业环境科学学报Issue(2)：234-239,6.DOI:10.11654/jaes.2016.02.004
缺Fe/Zn及盐胁迫下苋菜对Cd及矿质元素的吸收与IRT1表达的关系
Cadmium and mineral element accumulation and IRT1 gene expression of Amaranth hybidus L. under iron/zinc deficiencies or salt stress
摘要
Abstract
Previous research has showed that iron- regulated transporter 1(IRT1)gene plays an important role in the accumulation and transfer of metals in plants. Here a low Cd-accumulating cultivar Baigenjianye(B)and a high Cd-accumulating cultivar Huahong(H)were used to investigate the characteristics of mineral element and Cd accumulation by and IRT1 expression level in roots of Amaranth hybidus L. under iron(Fe)or zinc(Zn)deficiencies or salt stress. Quantitative PCR was used to determine the expression level of IRT1. Biomass of two cultivars obviously decreased in the treatments, with the greatest reduction observed in Fe deficiency. The accumulation of Cd and mineral elements significantly(P<0.05)increased under Fe and Zn deficiency treatments. However, salt stress showed a significant(P<0.05)in-hibiting effect on Cd accumulation but a significant (P<0.05)promotion on the accumulation of mineral elements. The concentrations of Cd, Fe, Zn and Mg, and the expression of gene IRT1 in root protoplasts were obviously higher in high Cd- accumulating cultivar Huahong(H) than those in low Cd-accumulating cultivar Baigenjianye(B). Furthermore, elevated expression levels of IRT1 promoted the concentrations of Cd, Fe, Zn and Mg in stems and leaves. Therefore, while Cd concentration in crops is concerned, the content of minerals in the soil should be paid attention to at the same time.关键词
苋菜/矿物质/盐胁迫/IRT1Key words
amaranth/minerals/salt stress/IRT1分类
资源环境引用本文复制引用
余丹萍,李取生,王立立,徐智敏,郭世鸿,胡妮,陈惠君..缺Fe/Zn及盐胁迫下苋菜对Cd及矿质元素的吸收与IRT1表达的关系[J].农业环境科学学报,2016,(2):234-239,6.基金项目
国家自然科学基金项目（41371321）；广东省产学研项目 （）
