Tolerance of lead by forage peanut cultivated in two soil classes

  • Josy Karla de Oliveira Santos Programa de Pós-graduação em Ciências Ambientais. Universidade de Taubaté (UNITAU), Rua Visconde do Rio Branco, n° 210, CEP: 12020-240, Taubaté, SP, Brazil.
  • Ana Aparecida da Silva Almeida Instituto Básico de Biociências. Universidade de Taubaté (UNITAU), Av. Tiradentes, 500, CEP 12030-180, Taubaté, SP, Brazil.
  • Julio Cesar Raposo de Almeida Instituto Básico de Biociências. Universidade de Taubaté (UNITAU), Av. Tiradentes, 500, CEP 12030-180, Taubaté, SP, Brazil.
  • Paula Blamberg Ribeiro da Silva Programa de Pós-graduação em Ciências Ambientais. Universidade de Taubaté (UNITAU), Rua Visconde do Rio Branco, n° 210, CEP: 12020-240, Taubaté, SP, Brazil.
Keywords: Arachis pintoi, gleysol, oxisol, polluted soil

Abstract

 

This work evaluated the potential of lead (Pb) phytoextraction by forage peanut, Arachis pintoi, cultivated on an Oxisol and a Gleysol. The samples of these soils received Pb as lead acetate heptahydrate (Pb(C2H3O2)2.7H2O) at rates of 0, 150 and 300 mg kg-1. The plants were cultivated in pots filled with Pb contaminated soil, and 105 days after planting were collected to determine shoot and root dry matter. Lead contents in soil and plant samples were determined using an atomic absorption spectrophotometer. Lead did not affect shoot dry matter yield in both soil classes, but linearly reduced root dry matter. The highest Pb concentration in the plant was detected in the A. pintoi shoot. This species is not a Pb accumulator but may be considered Pb tolerant and is indicated for revegetation programs in Pb-polluted soils.


Author Biographies

Josy Karla de Oliveira Santos, Programa de Pós-graduação em Ciências Ambientais. Universidade de Taubaté (UNITAU), Rua Visconde do Rio Branco, n° 210, CEP: 12020-240, Taubaté, SP, Brazil.
     
Ana Aparecida da Silva Almeida, Instituto Básico de Biociências. Universidade de Taubaté (UNITAU), Av. Tiradentes, 500, CEP 12030-180, Taubaté, SP, Brazil.
    
Julio Cesar Raposo de Almeida, Instituto Básico de Biociências. Universidade de Taubaté (UNITAU), Av. Tiradentes, 500, CEP 12030-180, Taubaté, SP, Brazil.
   
Paula Blamberg Ribeiro da Silva, Programa de Pós-graduação em Ciências Ambientais. Universidade de Taubaté (UNITAU), Rua Visconde do Rio Branco, n° 210, CEP: 12020-240, Taubaté, SP, Brazil.
  
Published
26/12/2019
Section
Special