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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Temporal dynamic responses of roots in contrasting tomato genotypes to cadmium tolerance

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Autor(es):
Reis Borges, Karina Lima [1] ; Salvato, Fernanda [1, 2] ; Alcantara, Berenice Kussumoto [3] ; Nalin, Rafael Storto [4] ; Piotto, Fernando Angelo [1] ; Azevedo, Ricardo Antunes [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Luiz de Queiroz Coll Agr, Dept Genet, Lab Plant Genet & Biochem, Piracicaba, SP - Brazil
[2] Univ Estadual Campinas, Inst Biol, Lab Mol Physiol Plants, Campinas, SP - Brazil
[3] Univ Fed Acre, Rio Branco, AC - Brazil
[4] Luiz de Queiroz Coll Agr, Dept Genet, Lab Stat Genet, Piracicaba, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: ECOTOXICOLOGY; v. 27, n. 3, p. 245-258, APR 2018.
Citações Web of Science: 19
Resumo

Despite numerous studies on cadmium (Cd) uptake and accumulation in crops, relatively little is available considering the temporal dynamic of Cd uptake and responses to stress focused on the root system. Here we highlighted the responses to Cd-induced stress in roots of two tomato genotypes contrasting in Cd-tolerance: the tolerant Pusa Ruby and the sensitive Calabash Rouge. Tomato genotypes growing in the presence of 35 mu M CdCl2 exhibited a similar trend of Cd accumulation in tissues, mainly in the root system and overall plants exhibited reduction in the dry matter weight. Both genotypes showed similar trends for malondialdehyde and hydrogen peroxide accumulation with increases when exposed to Cd, being this response more pronounced in the sensitive genotype. When the antioxidant machinery is concerned, in the presence of Cd the reduced glutathione content was decreased in roots while ascorbate peroxidase (APX), glutathione reductase (GR) and glutathione S-transferase (GST) activities were increased in the presence of Cd in the tolerant genotype. Altogether these results suggest APX, GR and GST as the main players of the antioxidant machinery against Cd-induced oxidative stress. (AU)

Processo FAPESP: 09/54676-0 - Estresse oxidativo induzido por metais: novas abordagens
Beneficiário:Ricardo Antunes de Azevedo
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/14349-3 - Transporte e acúmulo de cádmio em diferentes genótipos de tomateiro: abordagens fisiológicas, proteômicas e moleculares
Beneficiário:Ricardo Antunes de Azevedo
Linha de fomento: Auxílio à Pesquisa - Regular