铅胁迫对薄荷幼苗生理生长特性的影响  

Effects of Pb Stress on Physiological Growth Characteristics of Mentha haplocalyx Seedlings

作　　者：李璟琦[1] 孙星 LI Jing-qi;SUN Xing(Shaanxi Xueqian Normal University,Xi’an,Shaanxi 710100)

机构地区：[1]陕西学前师范学院,陕西西安710100

出　　处：《安徽农业科学》2024年第13期140-143,共4页Journal of Anhui Agricultural Sciences

基　　金：陕西省大学生创新创业训练项目(S202114390064);陕西基础科学研究院科研计划项目(22JHQ046);陕西省教育厅专项科研计划项目(22JK0333);2021年陕西省一流课程建设项目“植物生物学线上线下混合式一流课程建设”。

摘　　要：以薄荷幼苗为对象,研究200、400、600、800、1 000 mg/L不同浓度乙酸铅对薄荷生理生长特性的影响。结果表明:幼苗株高随着铅浓度上升表现出低浓度促进、高浓度抑制的趋势,铅浓度为200 mg/L时促进生长效果最佳。在不同浓度乙酸铅处理下,叶绿素含量、MDA含量、可溶性糖含量和SOD活性随着铅浓度的升高均呈现先升后降的趋势。脯氨酸含量随铅浓度的升高呈现一直上升趋势,铅浓度为1 000 mg/L达最大值,与CK相比达到显著差异水平。Using Mentha haplocalyx seedlings as the research object,the effects of different concentrations of lead acetate at 200,400,600,800,and 1 000 mg/L on the physiological growth characteristics of Mentha haplocalyx were studied.The results showed that with the increase of Pb concentration,the plant height of Mentha haplocalyx seedlings was promoted at low concentration and inhibited at high concentration.When the Pb stress level was 200 mg/L,the promotion effect was the most obvious.Under different concentrations of lead acetate treatment,the chlorophyll,MDA,soluble sugar content and SOD activity of Mentha haplocalyx seedlings increased first and then decreased with the increase of lead concentration.The proline content increased with the increase of Pb concentration,and reached the maximum at the Pb concentration of 1 000 mg/L,which was significantly different from CK.

关 键 词：薄荷 重金属 铅胁迫 生理生长特性 

分 类 号：Q945.78[生物学—植物学]