Preliminary study on Cd accumulation characteristics in Sansevieria trifasciata Prain  

作　　者：Xiong Li Yongping Yang 

机构地区：[1]Germplasm Bank of Wild Species,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,650201,China

出　　处：《Plant Diversity》2020年第5期351-355,共5页植物多样性（英文版）

基　　金：This work was financially supported by the Youth Innovation Promotion Association CAS(2020387).

摘　　要：Phytoremediation techniques to clean heavy metal pollution soil depend on identifying plant species that can act as phytoremediators.One important approach to screening potential phytoremediators is to evaluate characteristics of heavy metal accumulation.In this study,we performed firsthand analysis of Cd tolerance and accumulation characteristics of three Sansevieria trifasciata cultivars by pot experiment.Plant growth results showed that all three S.trifasciata cultivars can tolerate 50 mg kg^-1 soil Cd concentration.After growth under 50 mg kg^-1 soil Cd concentration for 4 months,the Cd bioconcentration factors in the shoots of S.‘Trifasciata’,S.trifasciata‘Laurentii’,and S.trifasciata‘Silver Hahnii’were 1.26,1.30,and 1.19,while those in the roots were 12.53,11.43,and 5.45,respectively.This result reveals the considerably low translocation factors of 0.10,0.12,and 0.22 for S.‘Trifasciata’,S.trifasciata‘Laurentii’,and S.trifasciata‘Silver Hahnii’,respectively.These results suggest that all three S.trifasciata cultivars had high Cd absorption capacities but low Cd translocation capacities.In combination with total Cd accumulation distribution and plant growth characteristics,S.trifasciata can be designed as a phytostabilizer in Cd-contaminated soils in its cultivation regions.Meanwhile,the mechanism of high Cd tolerance and accumulation characteristics in the roots of S.trifasciata should be explored.This study provides new resources for dealing with Cd-contaminated soils and exploring Cd tolerance and accumulation mechanisms in plants.

关 键 词：Sansevieria trifasciata CADMIUM PHYTOEXTRACTION PHYTOSTABILIZATION HYPERACCUMULATOR 

分 类 号：X173[环境科学与工程—环境科学]