The plant-growth promoting bacteria promote cadmium uptake by inducing a hormonal crosstalk and lateral root formation in a hyperaccumulator plant Sedum alfredii

Wu, Yingjie; Ma, Luyao; Liu, Qizhen; Vestergård, Mette; Topalović, Olivera; Wang, Qiong; Zhou, Qiyao; Huang, Linjuan; Yang, Xiaoe; Feng, Ying

doi:10.1016/j.jhazmat.2020.122661

Cited by 74 publications

(18 citation statements)

References 69 publications

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“…These results showed that P. rhodesiae GRC140 remains viable in the hydroponic systems and can colonize T. latifolia roots in the presence of 40 mg/L of Cd. Similar results were reported by Wu, et al [ 8 ], who observed that Pseudomonas fluorescens colonizes the roots of Sedum alfredii plants exposed to 25 µM (5.9 mg/L) of Cd(NO 3 ) 2 .…”

Section: Resultssupporting

confidence: 90%

“…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%

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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: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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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“…Most studies have focused on the activity of one or a few phytohormones, but hormonal crosstalk could be much more complex than expected. Wu et al [ 158 ] demonstrated that the inoculation of the hyperaccumulating plant Sedum alfredii with a PGPR strain caused a strong increase in lateral root formation and Cd acquisition, enhancing phytoremediation efficiency. Transcriptome analysis of the inoculated plant showed an up-regulation of 146 extra genes involved in hormonal balance, compared to a control.…”

Section: Plant–bacteria Interactions In Rhizosphere and Defense From Heavy Metal Stressmentioning

confidence: 99%

Rhizosphere Microbial Communities and Heavy Metals

Caracciolo

Terenzi

2021

Microorganisms

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The rhizosphere is a microhabitat where there is an intense chemical dialogue between plants and microorganisms. The two coexist and develop synergistic actions, which can promote plants’ functions and productivity, but also their capacity to respond to stress conditions, including heavy metal (HM) contamination. If HMs are present in soils used for agriculture, there is a risk of metal uptake by edible plants with subsequent bioaccumulation in humans and animals and detrimental consequences for their health. Plant productivity can also be negatively affected. Many bacteria have defensive mechanisms for resisting heavy metals and, through various complex processes, can improve plant response to HM stress. Bacteria-plant synergic interactions in the rhizosphere, as a homeostatic ecosystem response to HM disturbance, are common in soil. However, this is hard to achieve in agroecosystems managed with traditional practices, because concentrating on maximizing crop yield does not make it possible to establish rhizosphere interactions. Improving knowledge of the complex interactions mediated by plant exudates and secondary metabolites can lead to nature-based solutions for plant health in HM contaminated soils. This paper reports the main ecotoxicological effects of HMs and the various compounds (including several secondary metabolites) produced by plant-microorganism holobionts for removing, immobilizing and containing toxic elements.

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“…On the other hand, such bacteria can improve plant growth and confer protection against abiotic stress by the production of hormones (auxins, cytokinins, etc. ), or protect the host plant against other pathogens by the production of antagonistic substances or by competition for space and nutrients (Ma et al 2011b;Reinhold-Hurek and Hurek 2011;Wu et al 2020a). Metal-tolerant bacteria can also produce organic acids and metal chelators that can favour metal solubility, transport, and tolerance (Idris et al 2006;Ma et al 2011a;Visioli et al 2015).…”

Section: Interaction Of Hyperaccumulators With Biotic Environmentmentioning

confidence: 99%

Physiology and Molecular Biology of Trace Element Hyperaccumulation

Merlot

Torre

Hanikenne

2020

Agromining: Farming for Metals

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Metals (trace elements) are essential for plants but become toxic at high concentration. Remarkably, about 700 species worldwide are able to accumulate large quantities of metals in their leaves and are therefore called metal hyperaccumulators. In the context of sustainable development, there is renewed interest in understanding the mechanisms of metal hyperaccumulation that may become instrumental for improved metal phytoextraction from contaminated soils and for making metals available at lower environmental cost. In addition, studying the molecular mechanisms of hyperaccumulation in diverse plant species is necessary in order to understand the evolution of this extreme and complex adaptation trait in plants. Our current knowledge of metal hyperaccumulation is based mostly on the analysis of few species from the Brassicaceae family and suggests that the underlying mechanisms result from an exaggeration of the basic mechanisms involved in metal homeostasis. However, the development of Next Generation Sequencing technologies enables the study of new hyperaccumulator species and therefore the revealing of greater diversity in these mechanisms. The goal of this chapter is to provide background information on metal hyperaccumulation and give an instantaneous picture of what is currently known about the molecular mechanisms involved in this trait. We also attempt to outline for the reader the future scientific challenges that this field of research is facing.

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The plant-growth promoting bacteria promote cadmium uptake by inducing a hormonal crosstalk and lateral root formation in a hyperaccumulator plant Sedum alfredii

Cited by 74 publications

References 69 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

Rhizosphere Microbial Communities and Heavy Metals

Physiology and Molecular Biology of Trace Element Hyperaccumulation

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