农业环境科学学报Issue(11)：2098-2103,6.DOI:10.11654/jaes.2014.11.004
亚硒酸盐/硒酸盐及相互作用对水稻吸收及转运硒的影响
Effects of Selenite/Selenate and Their Coexistence in Plant on Selenium Uptake and Translocation in Rice
摘要
Abstract
Selenium(Se)exists as both selenate and selenite in soil, and plant roots can take up these two ions. A root splitting system experiment was carried out to study the effect of selenite/selenate and their coexistence in plant on selenium(Se)uptake and translocation in rice seedlings. Selenate(Na2SeO4)and selenite(Na2SeO3)uptake kinetics by rice were also investigated in solution culture. When both sides of the root splitting system was supplied with either Na2SeO3 or Na2SeO4, the concentration of Se was 117.8 mg·kg-1 and 9.85 mg·kg-1 in rice roots, and 1.39 mg·kg-1 and 6.14 mg·kg-1 in rice shoots, respectively. Transfer factor of Se from roots to shoots was respectively 0.01 and 0.69. However, when the system was supplied with Na2SeO3 in one side and Na2SeO4 in the other side, Se concentration in rice roots was 103.1 mg·kg-1 on Na2SeO3-supplied side and 18.9 mg·kg-1 on Na2SeO4-supplied side. The Se concentration in rice shoots was 6.26 mg·kg-1 and Se transfer factor was 0.10. The coexistence of selenite in rice plant enhanced selenate uptake by rice seedlings, while the existence of selenate had no significant effect on selenite uptake. The selenite uptake rate was 13 times greater than that of selenate. The affinity of rice root to selenite was weaker than that of selenate.关键词
硒酸盐/亚硒酸盐/共存/分根/转运Key words
selenate/selenite/coexistence/root split technique/translocation分类
农业科技引用本文复制引用
黄青青,陈思杨,王琪,乔玉辉,江荣风,李花粉..亚硒酸盐/硒酸盐及相互作用对水稻吸收及转运硒的影响[J].农业环境科学学报,2014,(11):2098-2103,6.基金项目
国家自然科学基金项目（41073094）；农业部公益性行业专项 （）
