Effects of Exogenous Selenium on Physiological Characteristics of Mung Bean Seedling Under Cd Stress
The effects of additional Se4＋ （0. 8, 1.6, 2.4, 3. 2, 4. 0 mg/L） on the ultraweak photon, chlorophyll content, soluble protein content of mung bean seedlings under the stress of Cd~＋ （10, 20 rag/L） were studied by hydroponic experiment. The results indicated that ultraweak photon increased firstly then decreased, again increased along with the increase of stress time. The Se4＋ of 0.8, 1.6 mg/L could increase ultraweak photon of mung bean seedlings under the stress of two kinds concentration Cd2＋ while the concentration of Se4＋ with 1.6 mg/L was the best. Under stress of Cd2＋ with 10, 20 mg/L, chlorophyll content and soluble protein content of leaves in mung bean seedling increased firstly and then decreased with the increasing of Se4＋ concentra- tions. When Se4＋ concentration was less than 4.0 mg/L, chlorophyll content and soluble protein content were higher than that under single stress with Cd2~ , and the value of chlorophyll content and soluble protein content in the treatment with 1.6 mg/L Se4＋ were the highest. Under the stress of 10 mg/L Cd2~ , the pro- line content of leaves in mung bean seedlings increased firstly and then decreased with the increasing of Se4＋ concentrations. When Se4＋ concentration was less than 4.0 mg/L, proline content was higher than that of single stress with Cd2~ and proline content was the highest with 1.6 mg/L Se4＋. Proline content decreased gradually with the increasing of Se4＋ concentrations under the stress of 20 mg/L Cd2＋. When Se4＋ concentra- tion was less than 2.4 mg/L, proline content was higher than that of single stress with Cdz＋ and proline content was the highest under the treatment with 0.8 mg/L Se4＋. The research showed that when the Se4＋ concentration was less than 2.4 mg/L, there was alleviation effect on mung bean seedlings under the stress of Cd2＋ with 10, 20 rag/L, and the treatment with 1.6 mg/L Se4＋ had the best effect.
exogenous selenium Cd2+ stress mung bean seedling~ physiological characteristics
国家科技期刊平台
NSTL
万方数据
维普
