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

被引：0
作者：
Karina Lima Reis Borges
Fernanda Salvato
Berenice Kussumoto Alcântara
Rafael Storto Nalin
Fernando Ângelo Piotto
Ricardo Antunes Azevedo
机构：
[1] “Luiz de Queiroz” College of Agriculture,Laboratory of Plant Genetics and Biochemistry, Genetics Department
[2] State University of Campinas,Laboratory of Molecular Physiology of Plants, Institute of Biology
[3] Federal University of Acre,Laboratory of Statistical Genetics, Genetics Department
[4] “Luiz de Queiroz” College of Agriculture,undefined
来源：
Ecotoxicology | 2018年 / 27卷
关键词：
Antioxidants; Cadmium; Heavy metals; Oxidative stress;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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 μM 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.
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页码：245 / 258
页数：13
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