NaCl胁迫对花菖蒲叶片生长及几种生理指标的影响

目的]探讨花菖蒲的抗盐能力。方法]以取自江苏省宜兴苗圃的花菖蒲为材料,土壤盐化处理设5个盐度水平(0、0.2%、0.4%、0.6%、0.8%),采用盆栽法,研究不同NaCl胁迫强度条件下花菖蒲的生长及生理生化指标的变化情况。结果]随着NaCl胁迫强度的增加,花菖蒲的叶片有不同程度的干枯、发黄、失绿、生长势衰退等现象。丙二醛含量、游离脯氨酸含量和SOD活性均随胁迫强度的增大和胁迫时间的延长而整体表现为上升的趋势,叶绿素含量随胁迫强度和胁迫时间的延长呈不断降低的趋势。通过对外观形态的观测以及生理指标的分析,推断出花菖蒲的耐盐阈值是0.4%,存活阈值是0.8%。结论]该研究为改良土壤、绿化水体、湿地和盐碱地景观的营建提供了科学依据。

Effect of NaCl Stress on the Leaf Growth of Iris kaempferi and Its Several Physiological Indices

Objective] The study aimed to explore the salt-resistant ability of Iris kaempferi.Method] With I.kaempferi from Yixing nursery of Jiangsu Province as material,5 salinity levels(0,0.2%,0.4%,0.6% and 0.8%) were set up for soil salination treatment,the pot planting was usedto study the variation status of growth and physiological and biochemical indexes of I.kaempferi under different NaCl stress strength conditions.Result] The leaves of I.kaempferi appeared different degrees of dry rot,yellowing,green-loss...