Inhibition effect on the Allium cepa L. root growth when using hexavalent chromium-doped river waters.
The effect of Cr(6+) on Allium cepa root length was studied using both clean and polluted river waters. Seven series of Cr(6+)-doped polluted and non-polluted river waters were used to grow onions. Chromium concentration (Cr(6+)) of 4.2 mg L(-1)(EC(50) value), doped in clean river water caused a 50% reduction of root length, while in organically polluted samples similar root growth inhibition occurred at 12.0 mg Cr(6+) L(-1). The results suggested that there was a dislocation to higher values in toxic chromium concentration in polluted river water due to the eutrophization level of river water.
Espinoza-Quiñones
F R
FR
Chemical Engineering Postgraduate Program-NBQ, West Paraná State University, Rua da Faculdade, 645, Jardim Sta. Maria, Toledo, PR, 85903-000, Brazil. f.espinoza@terra.com.br
Szymanski
N
N
Palácio
S M
SM
Módenes
A N
AN
Rizzutto
M A
MA
Silva
F G
FG
Oliveira
A P
AP
Oro
A C P
AC
Martin
N
N
D002857:Chromium / Q000494:pharmacology / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D019697:Onions / Q000187:drug effects* / Q000254:growth & development; D018517:Plant Roots / Q000187:drug effects* / Q000254:growth & development; D045483:Rivers / Q000737:chemistry*; D018675:Toxicity Tests / Q000379:methods; D014876:Water Pollution
D002857:Chromium; C074702:chromium hexavalent ion