Effects of Selenium on Growth and Protein Content of Snap Bean Seedlings under Salt Stress
GAO Mei-ling et al(College of Life Science and Engineering,Qiqihaer University,Qiqihaer,Heilongjiang 161006)
[Objective] The aim was to study the effects of selenium on the plant salt resistance.[Method] With the seeds of snap bean as materials,the effects of Na2SeO3 with different concn.on the seedling growth and protein content was investigated under salt stress.[Result] When the Na2SeO3 solution concn was from 5 to 30 mg/L,the stem thickness of different treatments had no obvious change.The stem thickness of the treatment with 25 and 30 mg/L Na2SeO3 was significantly less than that with 5 mg/L Na2SeO3.When the Na2SeO3 solution concn was from 5 to 25 mg/L,the plant height of different treatments had no obvious change.The plant height of the treatment with 30 mg/L Na2SeO3 was significantly less than that of other treatments.The treatments with 10-25 mg/L Na2SeO3 could obviously improve the root vigor under the stress of 100 mg/L NaCl.Root vigor of the treatment with 5 and 30 mg/L Na2SeO3 was decreased obviously than that of CK,while the root vigor of the treatment with 20 and 25 mg/L Na2SeO3 were increased very significantly.After selenium treatment,the soluble protein content was higher than that of CK and that in the treatment with 25 mg/L Na2SeO3 was the highest.[Conclusion] Treatments with 10-25 mg/L Na2SeO3 could relieve the injury of NaCl on the snap bean seedling.