摘要
【目的】本研究探讨不同程度的根系互作方式对小花南芥和蚕豆生长、吸收和累积Pb的影响以及小花南芥和蚕豆根际不同互作方式效应分析。【方法】采用原子吸收分光光度法测量土壤和植株中的Pb含量,分析小花南芥和蚕豆根系采用PVC板隔开、尼龙筛布隔开、无隔板3种处理方式对植株吸收累积Pb的影响。【结果】(1)不同根系互作下,根系无隔板处理时,小花南芥和蚕豆生物量显著增加。(2)小花南芥Pb的累积量以无隔板较高,PVC板隔开较低;蚕豆Pb累积量以PVC板隔开较高,尼龙筛布隔开较低。(3)根际互作的总效应中,溶液效应占到70%左右,根系效应为30%左右。【结论】无隔板处理条件下,溶液效应(根系分泌物、根部共生菌等)是提高小花南芥Pb累积量,降低蚕豆Pb的累积量的主要原因。
[ Purpose ] The objective was to explore the correlated influence factors for growth, absorp- tion accumulation of Pb by using different ways of roots interaction of Arabis alpina and Vicia faba. [ Method ] The content of lead in soil and plant was determined by atomic absorption spectrometry. A. alpina and V. faba roots interaction, including PVC board separated, a nylon mesh cloth separated, non separated. The effects of content of lead of A. alpina and V. faba were analyzed. [ Results] （1） With no separated, the total microbial number of Arabis alpina and V. faba was found on variety no separated increased. （2） A high Pb accumulation of A. alpina was found on variety no separated and a low on variety PVC board separated; a high Pb accumulation of V. faba was found on variety PVC board separated and a low on variety a nylon mesh cloth separated. （3） Solution effects accounted for about 70% and root effects about 30%. [ Conclusion] The role of the solution （ root exudates and root symbiotic bacteria） should be the main reason to improve Pb accumulation of A. alpina and to re-duce Pb accumulation of V. faba.
出处
《云南农业大学学报（自然科学版）》
CSCD
北大核心
2017年第4期703-711,共9页
Journal of Yunnan Agricultural University:Natural Science
基金
国家自然科学-云南省联合基金项目(U1202236)
国家自然科学基金项目(41261096
31560163)
关键词
小花南芥
蚕豆
根际互作
Pb累积
Arabis alpina var. Parviflora Franch
Vicia faba L.
rhizosphere interactions
Pb accu-mulation
