Effects of phosphate and organic matter applications on arsenic uptake by and translocation inIsatis indigotica
| Autor: | Qiao Bin, Geng Liping, Zhao Quanli, Liu Wenju, Gao Ningda |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Ecology biology Chemistry chemistry.chemical_element Chromosomal translocation Isatis Isatis indigotica biology.organism_classification Phosphate Soil contamination chemistry.chemical_compound Horticulture Agronomy Shoot Organic matter Ecology Evolution Behavior and Systematics Arsenic |
| Zdroj: | Acta Ecologica Sinica. 33:2719-2727 |
| ISSN: | 1000-0933 |
| Popis: | Rice and drinking water can be the important sources of arsenic(As) for human intake,while little is known about As accumulation in Chinese Herbal Medicines.Soil culture experiments were conducted to investigate the effects of phosphate(P) and organic matter(OM) applications on arsenic uptake by and translocation in Isatis indigotica(Chinese name: Ban Langen),the Chinese Herbal Medicines with roots and leaves,using natural soil and the soil contaminated with arsenic.The results showed that P200(add 200 mg P2O5/kg in soil) increased root dry weights of Isatis indigotica compared to control(P0) in the natural soil or the soil with arsenic,but had no significant effect on the shoot biomass of Isatis indigotica.OM10(added organic matter at 10 g/kg) increased root dry weights of Isatis indigotica in the natural soil,but reduced the root and shoot dry weights of Isatis indigotica in the As-contaminated soil;In the natural soil,different P levels did not influence As accumulation in the roots of Isatis indigotica,but reduced As translocation from roots to shoots.Moreover,application of 200 mg P2O5/kg significantly decreased As concentrations in shoots.In the arsenic-contaminated soil,P application had no effect on As levels in the shoots,but the level of 100 mg P2O5/kg reduced the accumulation of arsenic in the roots of Isatis indigotica significantly.However,higher level of P application(200 mg P2O5/kg) increased As concentrations in the root of Isatis indigotica;For organic matter application experiment,OM10 reduced the arsenic accumulation in the roots and shoots of Isatis indigotica and the specific arsenic uptake significantly,and did not influence arsenic translocation in plant grown in the natural soil.However,OM5(added organic matter at 5 g/kg) decreased arsenic accumulation in the roots and shoots of Isatis indigotica and the specific uptake of arsenic,but increased arsenic transport from roots to shoots in Isatis indigotica grown in As-contaminated soil.When the level of organic matter increased up to 10 g/kg,the root-As level and the specific uptake of arsenic were higher than those of other treatments.Therefore,200 mg P2O5/kg and 10 g/kg organic matter were suitable to decrease As accumulation in Isatis indigotica growing in natural soil,but 100 mg P2O5/kg and 5 g/kg organic matter were better to reduce arsenic concentrations in this herb medicine grown in As-contaminated soil with arsenic concentrations around 30—40 g/kg. |
| Databáze: | OpenAIRE |
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