镉胁迫对珍珠梅生理生态特征的影响

Effects of Cadmium Stress on the Growth and Physiological Characteristics of Sorbaria sorbifolia

研究了不同浓度镉(Cd)胁迫对珍珠梅生理生态特性的影响。结果表明:与对照相比,低浓度镉胁迫下,珍珠梅含水量、叶绿素含量、丙二醛含量和超氧化物歧化酶活性均有提高,说明珍珠梅对Cd具有较强的抗性;叶和根中的可溶性蛋白含量随着镉浓度的增加而降低;高浓度镉胁迫下,珍珠梅各器官含水量、叶绿素含量、丙二醛含量和超氧化物歧化酶活性均有所降低。

The growth and physiological characteristics of Sorbaria sorbifolia at different concentrations of cadmium（Cd）were studied.The results showed that compared with the control,the water and chlorophyll and MDA contents and SOD activity increased to some extent at low concentration of Cd,illustrating that Sorbaria sorbifolia had stronger resistance against Cd;with increase of Cd concentration,the protein contents in leaf and root had some decrease;the water and chlorophyll and MDA contents and SOD activity decreased at high concentration of Cd.