NaCl对酸模叶蓼相关生理指标的影响

[目的]研究NaCl溶液对酸模叶蓼幼苗相关生理指标的影响。[方法]以药用植物酸模叶蓼幼苗为试验材料,将其用不同浓度的NaCl溶液（0、50、75、100、125、150 mmol/L）处理,测定其中的叶绿素、可溶性糖和丙二醛的含量,以判断酸模叶蓼的抗盐能力。[结果]在NaCl浓度≤125 mmol/L时,叶绿素含量随着盐浓度的增加而显著增加,而MDA含量随着盐浓度的增加而显著减少,可溶性糖含量则是先增加后降低;在NaCl浓度为150 mmol/L时,叶绿素含量明显比对照组的含量少,MDA含量明显比对照组的量大,可溶性糖含量也高于对照组。[结论]在0～150 mmol/L浓度范围内时,NaCl对酸模叶蓼的胁迫作用会致使酸模叶蓼启动自身的防御机制来适应这种胁迫的环境,表明酸模叶蓼具备一定的抗盐能力。

Effects of NaCl Solution on the Physiological Indices of Polygonum lapathifolium L.

[Objective] The aim was to study on the effects of NaCl solution on the physiological indices of Polygonum lapathifolium L.seedlings.[Method] Taking P.lapathifolium seedlings as the research materials,the chlorophyll,soluble sugar,and malonaldehyde contents were detected under different treatments of NaCl solutions(0,50,75,100,125,150 mmol/L),so as to determine the salt-resistant ability of P.lapathifolium.[Result] When NaCl≤125 mmol/L,chlorophyll content increased as the NaCl concentration enhanced.But MDA content reduced significantly;and soluble sugar content firstly enhanced and then fell.When NaCl concentration was 150 mmol/L,chlorophyll content was significantly less than that in the CK;MDA content was significantly greater;and soluble sugar content was also greater.[Conclusion]Within the range of 0-150 mmol/L,stress of NaCl on P.lapathifolium would start the self-defense mechanism of P.lapathifolium to adapt to the environmental stress.Thus,P.lapathifolium had certain salt-resistant ability.