Heavy metal toxicity in rice and soybean plants cultivated in contaminated soil

Revista Ceres

Maria Lígia De Souza Silva²  Godofredo Cesar Vitti¹  Anderson Ricardo Trevizam¹ 

[1] ,Universidade Estadual do Centro-Oeste Departamento de Agronomia Guarapuava Paraná ,Brasil

关键词: contamination;    plant nutrition;    symptomatology;    heavy metals;    Oriza sativa L.;    Glycine max L.;    contaminação;    nutrição de plantas;    sintomatologia;    metal pesado;    Oriza sativa L.;    Glycine max L.;   

DOI  :  10.1590/S0034-737X2014000200013

来源: SciELO

【 摘 要 】

Heavy metals can accumulate in soil and cause phytotoxicity in plants with some specific symptoms. The present study evaluated the specific symptoms on rice and soybeans plants caused by excess of heavy metals in soil. Rice and soybean were grown in pots containing soil with different levels of heavy metals. A completely randomized design was used, with four replications, using two crop species and seven sample soils with different contamination levels. Rice and soybean exhibited different responses to the high concentrations of heavy metals in the soil. Rice plants accumulated higher Cu, Mn, Pb and Zn concentrations and were more sensitive to high concentrations of these elements in the soil, absorbing them more easily compared to the soybean plants. However, high available Zn concentrations in the soil caused phytotoxicity symptoms in rice and soybean, mainly chlorosis and inhibited plant growth. Further, high Zn concentrations in the soil reduced the Fe concentration in the shoots of soybean and rice plants to levels considered deficient.

【 授权许可】

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