Abstract Title:

Is perchlorate metabolized or re-translocated within lettuce leaves? A stable-isotope approach.

Abstract Source:

Environ Sci Technol. 2008 Dec 15;42(24):9437-42. PMID: 19174928

Abstract Author(s):

Angelia L Seyfferth, Neil C Sturchio, David R Parker

Article Affiliation:

Department of Environmental Sciences, University of California, Riverside, California 92521, USA.

Abstract:

Perchlorate is an environmental contaminant that is found in drinking water and a variety of foodstuffs, but many questions regarding its uptake, transport, and persistence in higher plants remain unanswered. In a series of hydroponic experiments, a stable-isotope tracer of perchlorate (95% 37ClO4(-)) was utilized to determine the extent of in vivo metabolism and of phloem re-translocation of perchlorate at low (i.e., nmol/kg of fresh weight (FW)) concentrations in lettuce. Chlorate and chlorite metabolites were not detected in lettuce leaves at detection limits of 13.1 and 291 nmol/kg FW, respectively, and chloride isotopic signatures were not substantially different from natural chloride. Perchlorate exhibited no significant movement from older leaves into new leaves, nor to roots. Stable isotopes proved useful in assessing perchlorate metabolism and re-translocation within lettuce at nmol/kg levels. The absence of any metabolism or re-translocation indicates that perchlorate is relatively persistent within leafy produce, and that the primary mode of transport of perchlorate is through the xylem of higher plants.

Study Type : In Vitro Study
Additional Links
Problem Substances : Perchlorate : CK(142) : AC(33)
Adverse Pharmacological Actions : Bioaccumulator : CK(107) : AC(26)

Print Options


Key Research Topics

Sayer Ji
Founder of GreenMedInfo.com

Subscribe to our informative Newsletter & get Nature's Evidence-Based Pharmacy

Our newsletter serves 500,000 with essential news, research & healthy tips, daily.

Download Now

500+ pages of Natural Medicine Alternatives and Information.

This website is for information purposes only. By providing the information contained herein we are not diagnosing, treating, curing, mitigating, or preventing any type of disease or medical condition. Before beginning any type of natural, integrative or conventional treatment regimen, it is advisable to seek the advice of a licensed healthcare professional.

© Copyright 2008-2020 GreenMedInfo.com, Journal Articles copyright of original owners, MeSH copyright NLM.