江西农业学报2018，Vol.30Issue(3)：23-27,5.DOI:10.19386/j.cnki.jxnyxb.2018.03.05
外源硅对盐胁迫下黄芩幼苗生理生化特性的影响
Effects of Exogenous Silicon on Physiological and Biochemical Characteristics of Scutellaria baicalensis Seedlings under Salt Stress
摘要
Abstract
In order to explore the effects of exogenous silicon on the physiological and biochemical characteristics of Shangluo Scutellaria baicalensis seedlings under salt stress,the author treated the potted seedlings of S. baicalensis with different concentra-tions(0,0.01,0.025,0.05,0.10 g/L)of exogenous silicon(K2SiO3)for 8 days under 0.5% NaCl stress, and then deter-mined the activities of SOD,POD and CAT,as well as the contents of MDA and proline in their leaves. The results indicated that exogenous silicon could inordinately increase the activities of SOD, POD and CAT as well as the contents of MDA and proline in the leaves of S. baicalensis seedlings. Under the treatment Si2(0.05 g/L K2SiO3), the activities of POD and CAT were the high-est, being 120.0% and 60.4% higher than those in the salt control(CK2), respectively. Under the treatment Si1(0.025 g/L K2SiO3), the activity of SOD was the highest,being 39.4% higher than that in CK2. Under the salt stress,the MDA content in-creased first and then decreased with the increase in exogenous silicon concentration,and it reached the peak in the treatment Si2, and this maximum value was 1.48 times that in the blank control(CK1). The proline content was the highest in the treatment Si1, being 1.5 times that in CK1. Adding 0.05 or 0.025 g/L K2SiO3could moderately remit the damage of salt stress to S. baicalensis seedlings, and strengthen their salt resistance.关键词
外源硅/盐胁迫/黄芩/生理生化指标Key words
Exogenous silicon/Salt stress/Scutellaria baicalensis/Physiological biochemical index分类
农业科技引用本文复制引用
华智锐,李小玲..外源硅对盐胁迫下黄芩幼苗生理生化特性的影响[J].江西农业学报,2018,30(3):23-27,5.基金项目
陕西省科技厅项目(2017NY-027). （2017NY-027）
