Physiological responses and uptake of heavy metals by <i>Miscanthus sacchariflorus</i> (Maxim.) Benth., an energy plant species, under multiple heavy metals stress

Zhang, Jie; Xie, Simin; Wei, Yuanhuan; Liang, Yupeng

doi:10.1080/03650340.2021.1983174

Cited by 2 publications

(2 citation statements)

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“…When Cd 2þ concentration was 0.15-0.30 mM, SOD activity in the leaves significantly decreased. Similar result was also demonstrated in Miscanthus sacchariflorus (Zhang et al 2021) under heavy metal stress. This may be because Cd 2þ binds to the SOD enzyme protein-SH, causing damage to its catalytic center or enzyme structure (Li & Mei 1989).…”

Section: Discussionsupporting

confidence: 87%

Photosynthetic response, antioxidase activity, and cadmium uptake and translocation inMonochoria korsakowiiwith cadmium exposure

Zhou

Xin

Tian

2022

Water Science and Technology

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To identify the tolerance mechanisms of wetland plants exposed to heavy metal, a hydroponic experiment was used to investigate variations in photosynthetically physiological parameters and antioxidant enzyme activities in leaves of Monochoria korsakowii exposed to 0.05, 0.10, 0.15, 0.30, and 0.45 mM Cd2+ for 7 d. The Cd2+ concentrations in the plant roots, stems, and leaves were also investigated. Cd2+ exposure significantly decreased the total chlorophyll content, net photosynthetic rate, intercellular carbon dioxide concentration, and stomatal conductance, while stomatal limitation value had the opposite trend (P < 0.05). During Cd2+ stress, ascorbate peroxidase activity significantly increased (P < 0.05). The translocation factor for Cd2+ was significantly lower than that of the control, and both were less than 1 (P < 0.05). Cd2+ stress damaged the photosynthetic apparatus in the leaves. During Cd2+ stress, M. korsakowii alleviated oxidative stress by increasing the activities of antioxidant enzymes, such as APX. Under 0.45 mM Cd2+ stress, increased heat dissipation was responsible for alleviating the photooxidative damage to photosynthetic organs in the leaves. Meanwhile, the majority of Cd2+ was immobilized in the roots, thus alleviating excessive Cd2+ phytotoxicity in aboveground parts. Generally, M. korsakowii has potential application in the phytoremediation of low-cadmium-polluted water. HIGHLIGHTS Ascorbate peroxidase plays a significant role in alleviating oxidative stress in the leaves. Cadmium immobilized in roots accounted for the plant tolerance to cadmium exposure. M. korsakowii has potential application in phytopremediation of low-cadmium polluted water.

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Section: Discussionsupporting

confidence: 87%

Photosynthetic response, antioxidase activity, and cadmium uptake and translocation inMonochoria korsakowiiwith cadmium exposure

Zhou

Xin

Tian

2022

Water Science and Technology

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“…Previous studies have demonstrated that SOD, CAT and Pro antioxidant enzymes have the ability to counteract the reactive oxygen species (ROS) produced during heavy metal stress by cleaning plant cells, thereby aiding in detoxification at the physiological level [29,30]. In our current investigation, we observed that S. alba exposed to Cd stress exhibited eight DEGs associated with the biosynthesis of SOD, CAT, and Pro antioxidant enzymes in the roots.…”

Section: Effect Of CD On Antioxidant Enzyme Activities Of and Pro S A...mentioning

confidence: 54%

Integrative Physiological and Transcriptome Analysis Reveals the Mechanism of Cd Tolerance in Sinapis alba

Cai,

Yang,

Fang

et al. 2023

Genes

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Recently, pollution caused by the heavy metal Cd has seriously affected the environment and agricultural crops. While Sinapis alba is known for its edible and medicinal value, its tolerance to Cd and molecular response mechanism remain unknown. This study aimed to analyze the tolerance of S. alba to Cd and investigate its molecular response mechanism through transcriptomic and physiological indicators. To achieve this, S. alba seedlings were treated with different concentrations of CdCl2 (0.25 mmol/L, 0.5 mmol/L, and 1.0 mmol/L) for three days. Based on seedling performance, S. alba exhibited some tolerance to a low concentration of Cd stress (0.25 mmol/L CdCl2) and a strong Cd accumulation ability in its roots. The activities and contents of several antioxidant enzymes generally exhibited an increase under the treatment of 0.25 mmol/L CdCl2 but decreased under the treatment of higher CdCl2 concentrations. In particular, the proline (Pro) content was extremely elevated under the 0.25 and 0.5 mmol/L CdCl2 treatments but sharply declined under the 1.0 mmol/L CdCl2 treatment, suggesting that Pro is involved in the tolerance of S. alba to low concentration of Cd stress. In addition, RNA sequencing was utilized to analyze the gene expression profiles of S. alba exposed to Cd (under the treatment of 0.25 mmol/L CdCl2). The results indicate that roots were more susceptible to disturbance from Cd stress, as evidenced by the detection of 542 differentially expressed genes (DEGs) in roots compared to only 37 DEGs in leaves. GO and KEGG analyses found that the DEGs induced by Cd stress were primarily enriched in metabolic pathways, plant hormone signal transduction, and the biosynthesis of secondary metabolites. The key pathway hub genes were mainly associated with intracellular ion transport and cell wall synthesis. These findings suggest that S. alba is tolerant to a degree of Cd stress, but is also susceptible to the toxic effects of Cd. Furthermore, these results provide a theoretical basis for understanding Cd tolerance in S. alba.

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Physiological responses and uptake of heavy metals by Miscanthus sacchariflorus (Maxim.) Benth., an energy plant species, under multiple heavy metals stress

Cited by 2 publications

References 55 publications

Photosynthetic response, antioxidase activity, and cadmium uptake and translocation inMonochoria korsakowiiwith cadmium exposure

Photosynthetic response, antioxidase activity, and cadmium uptake and translocation inMonochoria korsakowiiwith cadmium exposure

Integrative Physiological and Transcriptome Analysis Reveals the Mechanism of Cd Tolerance in Sinapis alba

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