Plants prioritize phytochelatin synthesis during cadmium exposure even under reduced sulfate uptake caused by the disruption of <i>SULTR1;2</i>

Yamaguchi, Chisato; Ohkama‐Ohtsu, Naoko; Shinano, Takuro; Maruyama‐Nakashita, Akiko

doi:10.1080/15592324.2017.1325053

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Increased levels of thiols such as NPT have been attributed to the enhanced synthesis of PCs for chelation of metal ions (Clemens, 2001; Lima et al ., 2006). When plants are exposed to heavy metals, PCs as the important class of NPTs are synthesized using GSH in plant cells (Yamaguchi et al ., 2017). The thiol groups (such as PCs) are reported to chelate Cd efficiently through thiolate bands (Choppala et al ., 2014; Yamaguchi et al ., 2017) and, hence, contribute to Cd detoxification.…”

Section: Discussionmentioning

confidence: 99%

“…When plants are exposed to heavy metals, PCs as the important class of NPTs are synthesized using GSH in plant cells (Yamaguchi et al ., 2017). The thiol groups (such as PCs) are reported to chelate Cd efficiently through thiolate bands (Choppala et al ., 2014; Yamaguchi et al ., 2017) and, hence, contribute to Cd detoxification. Afterwards, the complexes formed (Cd–PC complexes) are sequestered to the vacuole (Choppala et al ., 2014; Yamaguchi et al ., 2017).…”

Section: Discussionmentioning

confidence: 99%

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Improved physiological defense responses by application of sodium nitroprusside in Isatis cappadocica Desv. under cadmium stress

Souri

Karimi

Farooq

et al. 2020

Physiologia Plantarum

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Isatis cappadocica is a well‐known arsenic‐hyperaccumulator, but there are no reports of its responses to cadmium (Cd). Nitric oxide (NO) is a signaling molecule, which induces cross‐stress tolerance and mediates several physio‐biochemical processes related to heavy metal toxicity. In this study, the effects of Cd and sodium nitroprusside (SNP as NO donor) on the growth, defense responses and Cd accumulation in I. cappadocica were investigated. When I. cappadocica was treated with 100 and 200 μM Cd, there was an insignificant inhibition of shoot growth. However, Cd stress at Cd400 treatment decreased significantly the dry weight of root and shoot by 73 and 38%, respectively, as compared to control. The application of SNP significantly improved the growth parameters and mitigated Cd toxicity. In addition, SNP decreased reactive oxygen species (ROS) production induced by Cd. The increased total thiol and glutathione (GSH) concentrations after SNP application may play a decisive role in maintaining cellular redox homeostasis, thereby protecting plants against oxidative damage under Cd stress. Bovine hemoglobin (Hb as NO scavenger) reduced the protective role of SNP, suggesting a major role of NO in the defensive effect of SNP. Furthermore, the reduction in shoot growth and the increase of oxidative damage were more severe after the addition of Hb, which confirms the protective role of NO against Cd‐induced oxidative stress. The protective role of SNP in decreasing Cd‐induced oxidative stress may be related to NO production, which can lead to stimulation of the thiols synthesis and improve defense system.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Improved physiological defense responses by application of sodium nitroprusside in Isatis cappadocica Desv. under cadmium stress

Souri

Karimi

Farooq

et al. 2020

Physiologia Plantarum

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“…Intracellular sulfate is activated to adenosine 5 -phosphosulfate (APS) by ATP sulfurylase and then reduced to sulfide by the actions of APS reductase (APR) and sulfite reductase. Then, sulfide is converted to cysteine (Cys) upon reaction with O-acetyl-L-serine, which is catalyzed by O-acetyl-L-serine (thiol) lyase [21][22][23]. The common antioxidant glutathione (GSH) is synthesized from Cys via ATP-dependent reactions catalyzed by gamma-glutamylcysteine synthase and GSH synthase.…”

Section: Introductionmentioning

confidence: 99%

A Low Level of NaCl Stimulates Plant Growth by Improving Carbon and Sulfur Assimilation in Arabidopsis thaliana

Hongqiao

Suyama

Mitani‐Ueno

et al. 2021

Plants

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High-salinity stress represses plant growth by inhibiting various metabolic processes. In contrast to the well-studied mechanisms mediating tolerance to high levels of salt, the effects of low levels of salts have not been well studied. In this study, we examined the growth of Arabidopsis thaliana plants under different NaCl concentrations. Interestingly, both shoot and root biomass increased in the presence of 5 mM NaCl, whereas more than 10 mM NaCl decreased plant biomass. To clarify the biological mechanism by which a low level of NaCl stimulated plant growth, we analyzed element accumulation in plants grown under different NaCl concentrations. In addition to the Na and Cl contents, C, S, Zn, and Cu contents were increased under 5 mM NaCl in shoots; this was not observed at higher NaCl concentrations. Adverse effects of high salinity, such as decreased levels of nitrate, phosphate, sulfate, and some cations, did not occur in the presence of 5 mM NaCl. An increase in C was possibly attributed to increased photosynthesis supported by Cl, Zn, and Cu, which also increased in shoots after NaCl application. Salt stress-responsive gene expression was enhanced under 20 mM NaCl but not at lower doses. Among the S metabolites analyzed, cysteine (Cys) was increased by 5 mM NaCl, suggesting that S assimilation was promoted by this dose of NaCl. These results indicate the usefulness of NaCl for plant growth stimulation.

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“…While plants with tolerance strategies are capable of accumulating, storing and immobizaling heavy metals by binding them to amino acids, 1 3 proteins or peptides (Pál et al 2006). The nitrate and sulphate assimilation pathways activated during heavy metal stress play an important role in the increase of phytochelatin (PC) production (Astolfi et al 2004;Wu et al 2015); furthermore, priority of phytochelatin synthesis during cadmium exposure even under reduced sulfate uptake has been also reported (Yamaguchi et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Interactions between plant hormones and thiol-related heavy metal chelators

2018

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Plants prioritize phytochelatin synthesis during cadmium exposure even under reduced sulfate uptake caused by the disruption of SULTR1;2

Cited by 8 publications

References 19 publications

Improved physiological defense responses by application of sodium nitroprusside in Isatis cappadocica Desv. under cadmium stress

Improved physiological defense responses by application of sodium nitroprusside in Isatis cappadocica Desv. under cadmium stress

A Low Level of NaCl Stimulates Plant Growth by Improving Carbon and Sulfur Assimilation in Arabidopsis thaliana

Interactions between plant hormones and thiol-related heavy metal chelators

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