Effects of salinization stress on growth and the antioxidant system of tall fescue
Effects of salinization stress on growth and the antioxidant system of tall fescue
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发表时间：
2012
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通讯作者：
Jiang Hai-dong
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作者：
Jiang Hai-dong
不同浓度NaCl的影响0、50、100、200、300 mmol/L对高羊茅生长和抗氧化酶系统的影响结果表明，50、100 mmol/L NaCl胁迫对高羊茅的生物量和MDA含量没有显著影响，而在200和300 mmol/L NaCl胁迫下，高羊茅的生物量显著降低，MDA含量显著升高，超氧化物歧化酶（SOD）活性，过氧化物酶（POD）和过氧化氢酶（CAT）活性随NaCl处理时间的延长先升高后降低，随着NaCl处理浓度的增加，酶活性降低的幅度越大，阿萨和GSH含量逐渐降低，类胡萝卜素含量先升高后降低，3种抗氧化剂的浓度均降低，尤其是在200和300 mmol/L浓度下。
The effects of different concentrations of NaCl(0,50,100,200,300 mmol/L) on growth and on the antioxidant enzyme system of tall fescue(Festuca arundinacea) were studied.The biomass and MDA content were not significantly affected when tall fescue were stressed by 50,100 mmol/L of NaCl as compared with the control,but the biomass of tall fescue was significantly reduced and MDA content increased significantly when stressed by 200 and 300 mmol/L of NaCl.The activities of superoxide dismutase(SOD),peroxidase(POD) and catalase(CAT) initially increased but then decreased with duration of NaCl treatment.The higher the concentrations of NaCl,the more the enzyme activities were reduced.Contents of AsA and GSH gradually decreased while carotenoid content increased initially but with prolonged duration of NaCl treatment,concentration of the three antioxidants decreased,especially at the 200 and 300 mmol/L concentrations.