CAJ | 학술논문

采用分根装置及营养液水培方法研究了硒酸盐（Na2SeO4）和亚硒酸盐（Na2SeO3）及其在植物体内相互作用对水稻吸收及转运硒的影响，以及水稻根系对硒酸盐和亚硒酸盐的吸收动力学。分根装置中水稻根系左右两侧都供给亚硒酸盐或硒酸盐时，水稻根系硒含量分别为117.8 mg·kg-1和9.85 mg·kg-1，地上部硒含量分别为1.39 mg·kg-1和6.14 mg·kg-1，硒向植株地上部的转移系数分别为0.01和0.69；分根装置中右侧供给Na2SeO3的水稻根系硒含量为103.1 mg·kg-1，左侧供给Na2SeO4的水稻根系硒含量为18.9 mg· kg-1，地上部硒含量为6.26 mg·kg-1，转移系数为0.10。亚硒酸盐的供给促进了水稻根系对硒酸盐的吸收，而硒酸盐对水稻吸收亚硒酸盐的影响不显著。吸收动力学结果显示，水稻根系对SeO2-3的最大吸收速率是SeO2-4的13倍，但是水稻根系对SeO2-3的亲和力低于对SeO2-4的亲和力。
채용분근장치급영양액수배방법연구료서산염（Na2SeO4）화아서산염（Na2SeO3）급기재식물체내상호작용대수도흡수급전운서적영향，이급수도근계대서산염화아서산염적흡수동역학。분근장치중수도근계좌우량측도공급아서산염혹서산염시，수도근계서함량분별위117.8 mg·kg-1화9.85 mg·kg-1，지상부서함량분별위1.39 mg·kg-1화6.14 mg·kg-1，서향식주지상부적전이계수분별위0.01화0.69；분근장치중우측공급Na2SeO3적수도근계서함량위103.1 mg·kg-1，좌측공급Na2SeO4적수도근계서함량위18.9 mg· kg-1，지상부서함량위6.26 mg·kg-1，전이계수위0.10。아서산염적공급촉진료수도근계대서산염적흡수，이서산염대수도흡수아서산염적영향불현저。흡수동역학결과현시，수도근계대SeO2-3적최대흡수속솔시SeO2-4적13배，단시수도근계대SeO2-3적친화력저우대SeO2-4적친화력。
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.