AMF对土壤压实胁迫下高羊茅生理的影响

Effect of arbuscular mycorrhizal fungi on the physiology of Festuca arundinacea under soil compaction stress

在土壤压实胁迫条件下,研究丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)对高羊茅(Festuca arundinacea)生理的影响。结果表明:4种土壤压实梯度下,与未接种对照相比,接种AMF处理高羊茅叶片超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性、抗坏血酸过氧化物酶(APX)活性、硝酸还原酶(NR)活性均不同程度高于未接菌处理,而丙二醛(MDA)含量和叶片相对电导率(EC)较低。同一土壤压实处理下,接种AMF处理的脯氨酸含量降低,可溶性糖、可溶性蛋白含量增加。接种处理能有效地增强高羊茅的抗土壤压实能力,以混合接种处理最优。

The effect of arbuscular mycorrhizal fungi（AMF）on the growth and physiology of Festuca arundinacea was studied under different soil compaction stresses.The results showed that under four different types of soil compaction stress,inoculation of AMF in F.arundinacealed to higher superoxide dismutase（SOD）activity,peroxidase（POD）activity,catalase（CAT）activity,and nitrate reductase（NR）activity than that of the non-inoculated treatment,whereas malondialdehyde（MDA）content and leaf relative conductivity（EC）decreased.Soluble sugar and protein content increased with the inoculation of AMF under the same soil compaction stress,whereas proline content decreased.Inoculated treatment with AMF significantly increased the stress resistance of F.arundinacea（P〈0.05）,and the mixed inoculated treatment was the best.