2种过路黄抗旱生理特性的研究

以过路黄与金叶过路黄为材料,通过盆栽干旱胁迫,同时以正常浇水处理为对照,研究了不同程度干旱胁迫对过路黄与金叶过路黄叶片的质膜透性、保护酶活性、渗透调节物质的影响.结果表明,在干旱胁迫下,过路黄与金叶过路黄叶片的质膜透性上升;超氧化物歧化酶(SOD)、过氧化物酶(POD)活性先上升,后下降;脯氨酸、可溶性蛋白含量增加,只是变化的幅度和进程不同.经几项生理指标的综合分析,得出过路黄比金叶过路黄具有较强的抗旱能力.

Physiological Process of Drought Resistance of Two Lysimachia Species

Taking the seedlings of Lysimachia christinae and L.nummularia 'Aurea' as experimental materials,through drought stress treatment on potted seedlings and well-watered treatment as control.The effects of drought stress on relative permeability of plasma,protective enzyme activity and osmoregulatory molecules in the leaves of two Lysimachia species were studied.The study results showed that the drought stress treatment resulted in membrane damage and increased membrane permeability of leaf cells,the activities of SOD and POD increased under the light drought stress and then declined under the severe drought stress,the content of praline and soluble protein in the leaves increased under drought stress,those kinds of changes differed from extend and procedure.Through comprehensive analysis of these physiological and biochemical characters,it was concluded that the drought resistant ability of two Lysimachia species decreased in order of L.christinae,L.nummularia 'Aurea'.