Transcription factors involved in plant responses to cadmium-induced oxidative stress

Cadmium is considered a highly toxic metallic element that does not have any beneficial biological functions for humans or plants. It has been reported that the antagonism of selenium to heavy metal stress has been observed in a variety of plants, and appropriate selenium could alleviate heavy metal-induced oxidative damage and reduce the accumulation of heavy metals in plants. The changes of physiological characteristics, root tip cells, cadmium concentration and accumulation of rape under cadmium stress were investigated in this study through pot experiment. Results showed that selenium could alleviate the inhibitory effect of cadmium on the growth of rape seedlings. The concentration and accumulation of cadmium were decreased after the selenium application in rape seeds, ranging from 19.93 to 22.97% and 27.96 to 43.88% respectively. And the decrease of photosynthetic pigment content induced by cadmium was significantly improved. The results of transmission electron microscopy showed that exogenous selenium and cadmium had metal complexation reaction and formed black precipitation, which may be related to the detoxification effect of selenium on cadmium. More critically, with the addition of selenium, the plasma membrane damage and free radical accumulation in root tips induced by cadmium stress were gradually alleviated in the histochemical staining experiment of rape root tips. These results may provide evidence for exploring effective measures to reduce cadmium accumulation in rape under cadmium-contaminated areas.

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An Overview of the Mechanisms through Which Plants Regulate ROS Homeostasis under Cadmium Stress

Luo,

Wu,

et al. 2024

Antioxidants

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Cadmium (Cd2+) is a non-essential and highly toxic element to all organic life forms, including plants and humans. In response to Cd stress, plants have evolved multiple protective mechanisms, such as Cd2+ chelation, vesicle sequestration, the regulation of Cd2+ uptake, and enhanced antioxidant defenses. When Cd2+ accumulates in plants to a certain level, it triggers a burst of reactive oxygen species (ROS), leading to chlorosis, growth retardation, and potentially death. To counteract this, plants utilize a complex network of enzymatic and non-enzymatic antioxidant systems to manage ROS and protect cells from oxidative damage. This review systematically summarizes how various elements, including nitrogen, phosphorus, calcium, iron, and zinc, as well as phytohormones such as abscisic acid, auxin, brassinosteroids, and ethylene, and signaling molecules like nitric oxide, hydrogen peroxide, and hydrogen sulfide, regulate the antioxidant system under Cd stress. Furthermore, it explores the mechanisms by which exogenous regulators can enhance the antioxidant capacity and mitigate Cd toxicity.

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Transcription factors involved in plant responses to cadmium-induced oxidative stress

Cited by 4 publications

References 133 publications

Integrated comparative transcriptome and weighted gene co-expression network analysis provide valuable insights into the response mechanisms of Alisma orientale to cadmium stress

Integrated comparative transcriptome and weighted gene co-expression network analysis provide valuable insights into the response mechanisms of Alisma orientale to cadmium stress

Effects of selenium application on reducing cadmium uptake and ameliorates cadmium stress on oilseed rape (Brassica napus L.) in cadmium-contaminated soil

An Overview of the Mechanisms through Which Plants Regulate ROS Homeostasis under Cadmium Stress

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