Salinity decreases Cd translocation by altering Cd speciation in the halophytic Cd-accumulator<i>Carpobrotus rossii</i>

Cheng, Ming; Kopittke, Peter M.; Wang, Anan; Tang, Caixian

doi:10.1093/aob/mcy148

Cited by 17 publications

(9 citation statements)

References 34 publications

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“…However, we observed that salt stress caused by NaCl reduced the Cd 2+ influx in roots and fungus ( Figure 2 , Figure 3 , and Figure S1 ). Similarly, NaCl reduced root cadmium uptake and translocation in the halophyte Carpobrotus rossii [ 7 , 8 ] and Atriplex halimus [ 91 ]. An important novel result was that the P. involutus could alleviate the salt suppression of Cd 2+ uptake in P. × canescens roots ( Figure 2 , Figure 4 , and Figure S1 ).…”

Section: Discussionmentioning

confidence: 99%

“…Cadmium (Cd 2+ ) pollution presents a critical threat to ecological environment and human life [ 1 , 2 , 3 , 4 , 5 ]. The Cd 2+ contamination occurring in salt-affected soils has become an increasing environmental concern in recent years [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Coastal areas are polluted by Cd 2+ due to rapid urbanization and industrialization.…”

Section: Introductionmentioning

confidence: 99%

“…Mining activities cause the release and spread of both hazardous heavy metals (HMs) and soluble salts in inland regions [ 11 ]. The Cd 2+ contamination in salt-affected soils complicates remediation processes [ 6 , 7 ]. Naturally occurring halophytes may be potentially useful for remediation and phytomanagement [ 6 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Ectomycorrhizal Fungal Strains Facilitate Cd2+ Enrichment in a Woody Hyperaccumulator under Co-Existing Stress of Cadmium and Salt

Deng

Zhu

Liu

et al. 2021

IJMS

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Cadmium (Cd2+) pollution occurring in salt-affected soils has become an increasing environmental concern in the world. Fast-growing poplars have been widely utilized for phytoremediation of soil contaminating heavy metals (HMs). However, the woody Cd2+-hyperaccumulator, Populus × canescens, is relatively salt-sensitive and therefore cannot be directly used to remediate HMs from salt-affected soils. The aim of the present study was to testify whether colonization of P. × canescens with ectomycorrhizal (EM) fungi, a strategy known to enhance salt tolerance, provides an opportunity for affordable remediation of Cd2+-polluted saline soils. Ectomycorrhization with Paxillus involutus strains facilitated Cd2+ enrichment in P. × canescens upon CdCl2 exposures (50 μM, 30 min to 24 h). The fungus-stimulated Cd2+ in roots was significantly restricted by inhibitors of plasmalemma H+-ATPases and Ca2+-permeable channels (CaPCs), but stimulated by an activator of plasmalemma H+-ATPases. NaCl (100 mM) lowered the transient and steady-state Cd2+ influx in roots and fungal mycelia. Noteworthy, P. involutus colonization partly reverted the salt suppression of Cd2+ uptake in poplar roots. EM fungus colonization upregulated transcription of plasmalemma H+-ATPases (PcHA4, 8, 11) and annexins (PcANN1, 2, 4), which might mediate Cd2+ conductance through CaPCs. EM roots retained relatively highly expressed PcHAs and PcANNs, thus facilitating Cd2+ enrichment under co-occurring stress of cadmium and salinity. We conclude that ectomycorrhization of woody hyperaccumulator species such as poplar could improve phytoremediation of Cd2+ in salt-affected areas.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ectomycorrhizal Fungal Strains Facilitate Cd2+ Enrichment in a Woody Hyperaccumulator under Co-Existing Stress of Cadmium and Salt

Deng

Zhu

Liu

et al. 2021

IJMS

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“…However, excessive Cd can damage the membrane structure of plant cells, affect protein synthesis, reduce enzyme activities, and inhibit plant growth and development (Jiang et al, 2019). Cd can also harm human and animal health through entering biological chains (Cheng et al, 2018). Cd contamination of soil mainly results from mining, urbanization, and sewage irrigation (Zahedifar & Moosavi, 2020; Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Cd contamination of soil mainly results from mining, urbanization, and sewage irrigation (Zahedifar & Moosavi, 2020; Zhang et al, 2020). These human activities also cause soil salinization, especially in arid and semi‐arid regions (Cheng et al, 2018; Stanley & Isabelle, 2015; Wang et al, 2019). Thus, Cd contamination and salinization may simultaneously occur in the soil.…”

Section: Introductionmentioning

confidence: 99%

Differential effects of arbuscular mycorrhizal fungi on three salt‐tolerant grasses under cadmium and salt stress

et al. 2022

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Salt‐tolerant plants generally grow in salty conditions, and some of them are also tolerant to heavy metal stress. Arbuscular mycorrhizal fungi (AMF) can help plants withstand abiotic stresses. However, few studies have focused on the effects of AMF on the growth of salt‐tolerant plants in cadmium (Cd)‐contaminated saline soils. In this study, a greenhouse pot experiment was conducted to investigate the effects of AMF (Funneliformis mosseae) on growth, ion uptake, and Na+ and Cd translocation in three salt‐tolerant grasses (Leymus chinensis, Puccinellia distans, and Astragalus adsurgens) in a Cd‐contaminated saline soil. The regulation of genes by AMF in A. adsurgens was also explored by transcriptome analysis. The results showed that AMF increased the biomass of A. adsurgens but not that of L. chinensis and P. distans. AMF promoted phosphorus (P) uptake from soil and improved shoot K+: Na+ ratio, but it decreased shoot Na+ and Cd concentrations and their translocation rates in A. adsurgens. Transcriptome analysis showed that AMF upregulated the differentially expressed genes (DEGs) encoding cytokinins, which may be linked to the increase in shoot biomass in inoculated A. adsurgens, but downregulated the DEGs related to light harvest, suggesting avoidance of photodamage. AMF downregulated the DEGs in the pathways of the cell wall and those associated with antioxidant enzymes. These results suggest that AMF symbiosis in A. adsurgens effectively alleviates the Na+ and Cd toxicity of shoots. This study implies the potential to use salt‐tolerant grasses in association with AMF to rehabilitate the heavy metal‐contaminated saline ecosystems.

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Extracting cadmium in the presence of salt: a study on three poplar clones under controlled conditions

Capuana

Bianchi

Cencetti

et al. 2020

Environ Sci Pollut Res

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Salinity decreases Cd translocation by altering Cd speciation in the halophytic Cd-accumulatorCarpobrotus rossii

Abstract: Salt addition decreased shoot Cd accumulation by decreasing Cd root-to-shoot translocation due to the rapid formation of Cd-S complexes (low mobility) within the root, without changing the concentrations of glutathione and phytochelatins.

Cited by 17 publications

References 34 publications

Ectomycorrhizal Fungal Strains Facilitate Cd2+ Enrichment in a Woody Hyperaccumulator under Co-Existing Stress of Cadmium and Salt

Ectomycorrhizal Fungal Strains Facilitate Cd2+ Enrichment in a Woody Hyperaccumulator under Co-Existing Stress of Cadmium and Salt

Differential effects of arbuscular mycorrhizal fungi on three salt‐tolerant grasses under cadmium and salt stress

Extracting cadmium in the presence of salt: a study on three poplar clones under controlled conditions

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