摘要
本文以石菖蒲作为供试植物,研究了铅、磷交互作用对植物抗氧化系统及丙二醛含量的影响。实验结果表明,随着磷浓度增加,相同浓度铅处理下植株SOD、POD、CAT活性先增加后减小;在铅浓度1 mmol/L时植株SOD、POD、CAT活性较低,并随铅浓度增加而增加,但在0.5 mmol/L的磷作用下有所降低。植株叶片MDA含量则出现相反变化。实验结果还显示,铅浓度与POD酶活性呈正相关,与CAT酶活性呈显著负相关;磷浓度与POD酶活性呈显著正相关,与CAT酶活性呈显著负相关。以铅、磷胁迫浓度为自变量X1、X2,POD活性为应变量Y1、CAT活性为应变量Y2,回归方程分别为Y1=0.230 X1-0.1195 X2＋27.674,Y2=-24.888 X1＋6.720 X2＋862.417。由此说明,适宜浓度的磷（0.1~0.5 mmol/L）可降低高浓度铅的活性,利于石菖蒲的生长。
The effects of lead and phosphorus interaction on the antioxidant system and MDA content of Acorus tatarinowii were studied in this paper. The experimental results showed that with the increase of phosphorus concentration,plants SOD,POD and CAT activities increased first and then decreased at the same concentration of lead. SOD,POD,CAT activities were lower at low lead concentration（ 1 mmol / L）,and increased with lead concentration increased,but decreased at high concentration of phosphorus（ 0. 5 mmol / L）. MDA contents of leaves had opposite changes. Multiple linear regression analysis showed that lead concentration had positive correlation with POD activity,and had negative correlation with CAT activity. Phosphorus concentration was positively correlated with POD activity,and negatively correlated with CAT activity. Setting lead and phosphorus stress concentrations as independent variables X1 and X2,POD activity and CAT activity as dependent variables Y1 and Y2,the regression equations were Y1= 0. 230X1- 0. 1195X2＋ 27. 674,Y2=- 24. 888X1＋ 6. 720X2＋ 862. 417.Therefore,suitable phosphorus concentration（ 0. 1- 0. 5 mmol / L） would reduce the activity of high concentration lead,which was good for the growth of Acorus tatarinowii.
出处
《西南农业学报》
CSCD
北大核心
2015年第6期2484-2489,共6页
Southwest China Journal of Agricultural Sciences
基金
重庆市自然科学基金计划项目(cstc2013jcyj A20024)
重庆市教委资助项目(KJ131207)
重庆市大学生创新创业训练计划项目(201310642004)
关键词
铅
磷交互作用
石菖蒲
抗氧化系统
Lead and phosphorus interaction
Acorus tatarinowii
Antioxidant system
