多壁碳纳米管对水蕨生理特性的影响OA

Based on previous studies,this research used the fern model plant Ceratopteris thalictroides as test material to investigate the effects of different concentrations of multi-walled carbon nanotubes(MWCNTs)on the physiological characteristics.The results showed that compared with the control group(0.0 mg/L MWCNTs),the T1(0.5 mg/L MWCNTs),T2(1.0 mg/L MWCNTs),and T3(2.5 mg/L MWCNTs)treat-ments had extremely significant(P＜0.01)effects on leaf SOD activity,while the T4(5.0 mg/L MWCNTs)treatment had a significant(P＜0.05)effect.Among them,SOD activity was the lowest in the T2 group(636.18 U/g),and POD activity was the lowest in T4 group(319.06 U/g);MWCNTs treatment had no significant effect(P＞0.05)on the contents of MDA and soluble sugar,both showed a fluctuating trend with the concentration of MWCNTs increased.DAB staining resulted in a blue-purple color.The comprehensive results indicate that treat-ments with 0.5-5.0 mg/L MWCNTs affect the physiological characteristics of C.thalictroides sporophytes,and SOD played a major role when exposed to the treatment of multi-walled carbon nanotubes;under high concentration treatment,the activities of SOD and POD changed signifi-cantly,and MDA content rose to the highest level,resulting in the"high concentration inhibition"phenomenon.