AVALIAÇÃO DO METABOLISMO DE NITROGÊNIO E CARBONO EM PLANTAS DE PARICÁ - SUJEITAS A DIFERENTES CONCENTRAÇÕES DE CÁDIO
DOI:
https://doi.org/10.14393/BJ-v38n0a2022-61137Palavras-chave:
Biochemical, Cadmium chloride, Heavy metal, Phytoextractor, Phytoremediation.Resumo
O desenvolvimento de atividades antrópicas como a indústria, mineração, agricultura, descarte de lixo urbano tem sido, as principais ações que resultam no aumento da contaminação por metais pesados no solo, água e ar. Um dos metais mais nocivos disponibilizados por essas atividades é o cádmio, e mesmo em baixas concentrações é muito tóxico principalmente nas estruturas das plantas. O objetivo deste trabalho foi verificar o comportamento bioquímico do metabolismo do nitrogênio e do carbono em mudas de paricá quando submetidas à aplicação crescente de cádmio. Para isso, foi realizado um experimento inteiramente casualizado com cinco tratamentos (controle, CdCl2 178μM, CdCl2 356μM, CdCl2 534μM, CdCl2 712μM), com sete repetições, totalizando 35 unidades experimentais. A sensibilidade deste vegetal às concentrações crescentes de cádmio é evidente. O sistema radicular foi onde o elemento tóxico se acumulou mais, solutos como carboidratos, sacarose foram afetados em suas concentrações, principalmente nas folhas. O sistema radicular viu em suas concentrações de glicina betaína uma possibilidade de osmoproteção, mas isso não refletiu um aumento na concentração de nitrato tanto na folha como nas raízes. fato não observado pela concentração de amônio que aumentou no sistema radicular. Os resultados mostraram que o cádmio foi transportado para a parte aérea, porém, concentrou-se principalmente no sistema radicular caracterizando-se como uma espécie fitoextratora.
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Copyright (c) 2022 Glauco André dos Santos Nogueira, Ana Ecídia de Araújo Brito, Vitor Nascimento Resende, Gerson Diego Pamplona Albuquerque, Cristine Bastos do Amarantes, Job Teixeira de Oliveira, Priscilla Andrade Silva, Cândido Ferreira de Oliveira Neto
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
