土壤含水量对驯化的野生牡丹Pro、MDA及根系活力的影响

Effect of Soil Moisture on Pro,MDA and Root Activity of Peony

以驯化的野生牡丹(Paeonia suffruticosa Andr)为材料,对3个不同土壤相对含水量(40%、60%、100%)梯度下根系中游离脯氨酸(Pro)含量、根系中丙二醛(MDA)含量和根系活力进行了测定,探讨牡丹根系的耐湿性。结果表明:随着土壤相对含水量的增加,牡丹根系活力逐渐减弱,根中的游离Pro含量不断增加,而MDA呈先上升后下降的趋势。说明驯化的野生牡丹根系有一定的耐湿能力,能根据土壤湿度的变化做出积极的生理响应。

The free proline(Pro) content,malondialdehyde(MDA) content and root activity of peony roots from a domestication Paeonia suffruticosa cultured under three different soil water contents(40%,60%,100%) were measured.The results show that the free proline of peony roots increased with the increase of soil water content while the root activity decreased with the increase of soil water content.However, MDA content first increased and then displayed a long downward trend.The results indicated that the domestication peony had submergence tolerance and showed resistance reaction under water stress.