扬花萝卜幼苗在Cr~(3+)污染环境下生长情况的研究

采用砂培法,研究了扬花萝卜幼苗受到Cr~(3+)污染胁迫后,植株的干质量、鲜质量,根冠比,叶绿素a、b和总蛋白质含量,以及超氧化物歧化酶(SOD)的活性的变化情况。结果表明,在Cr~(3+)(≤50 mg·L~(-1))胁迫下,植株的叶绿素含量、根长、株高、根冠比等均大于对照组;而高浓度Cr~(3+)(100,200,400mg·L~(-1))胁迫使叶绿素的含量减少,根长和株高生长受到抑制,根冠比呈下降趋势。在Cr~(3+)(≤100 mg·L~(-1))胁迫下,植株干质量、鲜质量和总蛋白质的含量略有增加,而随着Cr~(3+)胁迫浓度增加,植株的干质量、鲜质量和总蛋白质的含量呈现下降趋势。SOD活性随Cr~(3+)浓度变化呈现规律性变化,先变高后变低,这表现出扬花萝卜幼苗对低浓度Cr~(3+)有一定抗性作用。

Study of Seedling Growth Situation from Cr3+ Pollution in Yanghua Radish

Effects of Cr~（3＋） with different concentration to Yanghua radish seedlings on dry weight,fresh weight,root top ratio,the chlorophyll a,b content,total protein content,SOD activeness,were studied by the method of sand-culture.The results indicated that in low concentration Cr~（3＋）（≤50 mg·L~（-1）） under the coercion,plant＇s chlorophyll content,root length,plant height and root top ratio were higher than the control group;When with high concentration of Cr~（3＋）（100,200,400 mg·L~（-1）） stress,chlorophyll content was reduced,root length and plant height growth were inhibited,root top ratio was decreased.Similarly,with Cr~（3＋）（≤100 mg·L~（-1）） stress,the plant＇s dry weight,fresh weight and total protein content were increased slightly,and as Cr~（3＋） stress concentration,plant dry weight,fresh weight and total protein levels were declined.SOD activity changed with the Cr~（3＋） concentration showed regular changes.The first went high,then became to low.It was showed flowering radish seedlings has a certain resistance of Cr~（3＋）.