NaCl胁迫对碱蒿活性氧产生及抗氧化酶活性的影响

为了解NaCl胁迫对碱蒿(Artemisia anethifolia)耐盐性的影响,在温室盆栽条件下,通过研究碱蒿幼苗在不同浓度NaCl(0,25,50,100,200,400 mmol·L^-1)胁迫下的相对盐害率、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、丙二醛(MDA)含量、脯氨酸(Pro)含量、H₂O₂含量和超氧阴离子(O₂^-)产生速率的变化,结果表明:随着NaCl浓度增加,碱蒿幼苗相对盐害率和H₂O₂含量增加,而SOD活性、POD活性、Pro含量、O₂^-产生速率和MDA含量均呈先升高后降低的变化趋势。这表明碱蒿具有较强的耐盐性,SOD活性、POD活性、MDA和Pro含量均可作为碱蒿的耐盐生理指标。

Effects of NaCl Stress on Reactive Oxygen Species and Antioxidant Enzyme Activities of Artemisia anethifolia

This study reports the salt tolerance of Artemisia anethifolia regarding the change of the rate of salt injury,activity of superoxide dismutase(SOD) and peroxidase(POD),malondidehyde(MDA) content,free proline(Pro) content,H₂O₂ contents and superoxide radical(O₂^-) production rate in seedling of Artemisia anethifolia under different alkali concentration NaCl(0,25,50,100,200,400 mmol·L^-1) under greenhouse conditions.Results show that,with the increase of salt concentration,the seedling pre-integrated relative salt injury rates and H₂O₂ contents increased;SOD,POD,free proline,superoxide radical production rate and MDA contents of Artemisia anethifolia had low-high-low trend.We concluded that Artemisia anethifolia had a strong salt tolerance while SOD activity,POD activity,MDA content and free proline content could be used as important physiological indexes for salt tolerance in Artemisia anethifolia.