摘要
应用盆栽法,研究了在不同NaCl浓度(0、0.1%、0.3%、0.5%)梯度胁迫下雷竹叶片内的超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性和丙二醛(MDA)含量的变化。结果表明:①不同盐胁迫下雷竹都保持了较高的SOD活性成分,且在胁迫后期SOD活性成分高于对照或与对照持平;②高盐胁迫后期叶片中POD活性成分和对照相比略有下降,但在初期持平,甚至在中期显著高于对照,中盐胁迫下的叶片中POD活性成分在中期高于对照,后期和对照持平,而低盐胁迫和对照相比变化不是很明显;③盐胁迫下MDA的含量与对照差异不显著,其中在后期低盐胁迫下MDA的含量较对照低;④不同处理条件下,各项生理生化指标间的相关性不显著。综合来看,中盐胁迫下SOD和POD活性均保持较高水平,能抑制膜脂质过氧化作用,并使MDA含量保持在较低水平,表明雷竹能在短期内忍受Na^+浓度在0.3%的胁迫。
Determination was conducted on SOD and POD activity and MDA content in leaf of potted Phyllostachys praecox cv. prevernalis under different NaCl treatments（0, 0.1%, 0.3%,0.5%）. The result showed that different NaCl treated Ph. praecox cv. prevernalis could hold high SOD tivity and even higher than the control at the later period. POD activity in leaf under high stress decreased a little than that of the control at the later age, but similar at earlier stage and even higher evidently at middle state. POD activity in leaf under medium stress was higher and similar that that of ,he control at middle and later stage. POD under low salt stress had no evident difference of both treated bamboo and the control. MDA content in lcaf of treated bamboo had no great difference with that in the control. It had no close relationship among different physiochemical properties under different salt stress. The result demonstrated that medium salt stress treated bamboo could hold high SOD and POD activity and low MDA content, indicating Ph. praecox cv. prevernalis had salt tolerance under 0.3% of Na＋ during short time.
出处
《浙江林业科技》
北大核心
2011年第1期44-48,共5页
Journal of Zhejiang Forestry Science and Technology
基金
"十一五"国家科技支撑计划专题"亚热带基岩质海岸防护林体系构建技术试验示范"(2006BAD03A1406)
