The role of auxins and auxin-producing bacteria in the tolerance and accumulation of cadmium by plants

Rolón-Cárdenas, Gisela Adelina; Arvizu-Gómez, Jackeline Lizzeta; Soria-Guerra, Ruth Elena; Pacheco-Aguilar, Juan Ramiro; Alatorre‐Cobos, Fulgencio; Morales, Alejandro

doi:10.1007/s10653-021-01179-4

Cited by 21 publications

(12 citation statements)

References 121 publications

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“…Different studies have shown that heavy metal-tolerant plant growth-promoting rhizobacteria (PGPR) improve the phytoremediation processes [ 44 ], reduce heavy metal stress in plants, and contribute to plant growth by producing bacterial auxins [ 9 ].…”

Section: Resultsmentioning

confidence: 99%

“…Auxin-producing bacteria have been reported to protect plants against oxidative stress caused by Cd, increasing the activity of antioxidant enzymes and the synthesis of antioxidant molecules [ 9 ]. Therefore, we determined the effect of P. rhodesiae GRC140 and exogenous IAA on CAT activity and GSH content of T. latifolia plants exposed to Cd.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, bacterial-assisted phytoremediation has attracted much attention due to the potential of bacteria to increase plant growth, reduce the adverse effects of environmental stress, and enhance heavy metal phytoaccumulation by modulating endogenous phytohormone production [ 8 , 9 ]. Auxins are important phytohormones that regulate the development and stress response of plants [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…In A. thaliana plants, the application of exogenous naphthaleneacetic acid (NAA) increased Cd tolerance and Cd retention in the roots [ 11 ]. Moreover, auxin-producing bacteria tolerant to heavy metals are an excellent alternative to supply or restore auxin production in plants, thus improving the phytoremediation strategies [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Cd-Accumulation in Typha latifolia by Interaction with Pseudomonas rhodesiae GRC140 under Axenic Hydroponic Conditions

Rolón-Cárdenas

Martínez-Martínez

Arvizu-Gómez

et al. 2022

Plants

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The Typha genus comprises plant species extensively studied for phytoremediation processes. Recently, Pseudomonas rhodesiae GRC140, an IAA-producing bacterium, was isolated from Typha latifolia roots. This bacterium stimulates the emergence of lateral roots of Arabidopsis thaliana in the presence and absence of cadmium. However, the bacterial influence on cadmium accumulation by the plant has not been determined. Moreover, the P. rhodesiae GRC140 effect in Cd phytoextraction by T. latifolia remains poorly understood. In this work, an axenic hydroponic culture of T. latifolia was established. The plants were used to evaluate the effects of cadmium stress in axenic plants and determine the effects of P. rhodesiae GRC140 and exogenous indole acetic acid (IAA) on Cd tolerance and Cd uptake by T. latifolia. Biomass production, total chlorophyll content, root electrolyte leakage, catalase activity, total glutathione, and Cd content were determined. The results showed that Cd reduces shoot biomass and increases total glutathione and Cd content in a dose-dependent manner in root tissues. Furthermore, P. rhodesiae GRC140 increased Cd translocation to the shoots, while IAA increased the Cd accumulation in plant roots, indicating that both treatments increase Cd removal by T. latifolia plants. These results indicate that axenic plants in hydroponic systems are adequate to evaluate the Cd effects in plants and suggest that T. latifolia phytoextraction abilities could be improved by P. rhodesiae GRC140 and exogenous IAA application.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Cd-Accumulation in Typha latifolia by Interaction with Pseudomonas rhodesiae GRC140 under Axenic Hydroponic Conditions

Rolón-Cárdenas

Martínez-Martínez

Arvizu-Gómez

et al. 2022

Plants

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“…Ethylene can modulate oxidative stress pathways that increase with increasing H 2 O 2 content, and jasmonic acid and salicylic acid can play a protective role by alleviating Cd-induced oxidation [ 46 , 47 , 48 , 49 ]. At low concentrations of heavy metals, auxin can reduce toxicity in plants by reducing the production of H 2 O 2 and inhibiting the adsorption of Cd [ 50 ]. When plants are under heavy metal stress, such as that caused by Cd, they increase flavonoid production, which can function in antioxidant systems with Peroxidase, Ascorbate peroxidase (APX), etc., to alleviate the peroxidation of membranes, thereby maintaining the normal metabolism of the organism [ 46 ].…”

Section: Discussionmentioning

confidence: 99%

Mining Candidate Genes Related to Heavy Metals in Mature Melon (Cucumis melo L.) Peel and Pulp Using WGCNA

Shen

Tao

et al. 2022

Genes

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The content of metal ions in fruits is inseparable from plant intake of trace elements and health effects in the human body. To understand metal ion content in the fruit and pericarp of melon (Cucumis melo L.) and the candidate genes responsible for controlling this process, we analyzed the metal ion content in distinct parts of melon fruit and pericarp and performed RNA-seq. The results showed that the content of metal ions in melon fruit tissue was significantly higher than that in the pericarp. Based on transcriptome expression profiling, we found that the fruit and pericarp contained elevated levels of DEGs. GO functional annotations included cell surface receptor signaling, signal transduction, organic substance metabolism, carbohydrate derivative binding, and hormone-mediated signaling pathways. KEGG pathways included pectate lyase, pentose and glucuronate interconversions, H+-transporting ATPase, oxidative phosphorylation, plant hormone signal transduction, and MAPK signaling pathways. We also analyzed the expression patterns of genes and transcription factors involved in hormone biosynthesis and signal transduction. Using weighted gene co-expression network analysis (WGCNA), a co-expression network was constructed to identify a specific module that was significantly correlated with the content of metal ions in melon, after which the gene expression in the module was measured. Connectivity and qRT–PCR identified five candidate melon genes, LOC103501427, LOC103501539, LOC103503694, LOC103504124, and LOC107990281, associated with metal ion content. This study provides a theoretical basis for further understanding the molecular mechanism of heavy metal ion content in melon fruit and peel and provides new genetic resources for the study of heavy metal ion content in plant tissues.

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One‐pot fabrication of magnetic adsorbent based on polymeric ionic liquid/aminated carbon nanotubes composite for efficient capture of synthetic auxins in complex samples prior to chromatographic analysis

Zhang

Huang

2023

J of Separation Science

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Efficient enrichment is a challenging and indispensable step in the quantification of polar synthetic auxins in complex samples. In the current study, a new magnetic adsorbent based on polymeric ionic liquid/aminated carbon nanotube composite was fabricated with a one-pot precipitation copolymerization strategy and employed as the extraction phase of magnetic solid phase extraction of synthetic auxins. Various characterization techniques were utilized to inspect the morphology, structure, magnetic property, and functional groups of the prepared adsorbent. Under the optimal conditions, the obtained adsorbent displayed satisfactory capture performance towards studied auxins through multiple interactions. Adsorption studies evidenced that the adsorption procedure of the developed method towards analytes was fit for the Freundlich adsorption model and pseudo-second-order kinetics. Combining with high-performance liquid chromatography, sensitive and reliable method for the identification and quantification of trace synthetic auxins in environmental water and fruit juice samples was developed. The obtained limits of detection for water and fruit juice samples located in the ranges of 0.0059-0.013 and 0.018-0.031 μg/L, respectively. Recoveries in actual samples with different fortified contents varied from 82.2% to 117%, with satisfactory reproducibility. The results will evidence that the introduced extraction technique is a useful alternative for the entrapment of trace synthetic auxins from complex samples.

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The role of auxins and auxin-producing bacteria in the tolerance and accumulation of cadmium by plants

Cited by 21 publications

References 121 publications

Enhanced Cd-Accumulation in Typha latifolia by Interaction with Pseudomonas rhodesiae GRC140 under Axenic Hydroponic Conditions

Enhanced Cd-Accumulation in Typha latifolia by Interaction with Pseudomonas rhodesiae GRC140 under Axenic Hydroponic Conditions

Mining Candidate Genes Related to Heavy Metals in Mature Melon (Cucumis melo L.) Peel and Pulp Using WGCNA

One‐pot fabrication of magnetic adsorbent based on polymeric ionic liquid/aminated carbon nanotubes composite for efficient capture of synthetic auxins in complex samples prior to chromatographic analysis

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