摘要
【目的】野外调查发现普陀山苔草可能是一种铅富集植物,为了进一步确定普陀山苔草的铅锌富集特性。【方法】利用控制性盆栽试验研究铅锌单一及交互因素对普陀山苔草的生长、生理代谢及铅锌积累的影响。【结果】普陀山苔草对铅具有较强的富集能力,同时锌元素对普陀山苔草吸收铅具有协同作用。试验表明在铅浓度为600 mg/L、锌浓度为125 mg/L和250 mg/L时,其地上部分铅含量分别为3 299.92、3 212.76 mg/kg,铅转运系数和富集系数均大于1,其吸收铅的能力达到超富集。在铅浓度≤600 mg/L、锌浓度≤125 mg/L的单一及交互处理下,普陀山苔草的株高、根长、生物量较对照(P0Z0)显著增加(P<0.05)。当锌浓度为125 mg/L时,可减缓普陀山苔草叶片质膜透性和丙二醛增加的趋势。此外,在铅浓度为600 mg/L、锌浓度为125 mg/L时,普陀山苔草生物量和根系活力增至最大,而叶片质膜透性减至处理中最小。【结论】普陀山苔草是一种特定条件下的铅超富集植物,且在铅浓度为600 mg/L、锌浓度为125 mg/L时,最适宜于普陀山苔草的生长、代谢及铅的富集。因此,可将其用于铅污染土壤和铅锌矿山的修复和治理。
Objective】The objective of study was to clarify the lead and zinc enrichment characteristics of Carex putuoshanensis sp.which maybe a lead accumulating plant.【Method】Using a pot experiment to investigate the growth,physiological metabolism,and accumulation of Carex putuoshanensis sp.with lead and zinc exposure.【Result】Carex putuoshanensis sp.could significantly absorb and accumulate lead(P<0.05),and zinc had a synergistic effect with lead.When the treatment concentrations were lead 600 mg/L,zinc 125 mg/L and lead 600 mg/L,zinc 250 mg/L,the lead concentrations in shoots of Carex putuoshanensis sp.was 3 299.92 mg/kg,3 212.76 mg/kg,respectively,both bio-concentration and translocation factors were greater than 1,exceeded the critical of lead hyperaccumulator.When the lead treatment concentrations was less than 600 mg/L,the zinc treatment concentrations was less 125 mg/L the plant height,root length,biomasses of Carex putuoshanensis sp.increased significantly(P<0.05).The increase of relative electric conductivities and malondialdehyde were retarded by adding zinc with the concentration was 125 mg/L.Besides,when lead concentration was 600 mg/L and zinc concentration was 125 mg/L,the biomasses and root activity reached the maximum,the relative electric conductivities was the minimum.【Conclusion】Carex putuoshanensis sp.was a lead hyperaccumulator under certain conditions,when lead concentration was 600 mg/L and zinc concentration was 125 mg/L,it was the most suitable for the growth,physiological metabolism and lead accumulation of Carex putuoshanensis sp.,which could be utilized for lead contaminated soil and lead-zinc mines phytoremediation.
作者
马建玲
黄金龙
朱雪梅
邵继荣
文雯
李志强
何芳
MA Jian-ling;HUANG Jin-long;ZHU Xue-mei;SHAO Ji-rong;WEN Wen;LI Zhi-qiang;HE Fang(College of Environment Science,Sichuan Agricultural University,Chengdu 611130,China;Jiezi Town People's Government of Chongzhou,Chongzhou 611242,Sichuan,China;College of Biology Science,Sichuan Agricultural University,Ya忆an 625014,Sichuan,China)
出处
《四川农业大学学报》
CSCD
北大核心
2018年第4期463-471,共9页
Journal of Sichuan Agricultural University
基金
四川省科技支撑计划项目(2008FZ0180)
关键词
普陀山苔草
铅锌
富集特性
生理响应
Carex putuoshanensis sp.
lead and zinc
accumulation characteristics
physiological response
