Perspective on Phytoremediation for Improving Heavy Metal-Contaminated Soils

Shao, Hongbo; Chu, Li-Ye; Fu-tai, NI; Guo, Donggang; Li, Hua; Li, Wei-Xiang

doi:10.1007/978-90-481-9370-7_11

Cited by 12 publications

(5 citation statements)

References 64 publications

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“…The auxin-responsive mRNA was detected in Cd-treated Brassica juncea plants (Minglin et al 2005). Proteomic analysis of Cdtreated A. thaliana showed the induction of nitrilase protein, which is involved in auxin biosynthesis and the transcription activation of the gene (SAMT) involved in the biosynthesis of SA was detected in pea treated with Hg (Shao et al 2010). It is known that Cd induces the biosynthesis of ABA and ethylene, which in turn evoke various stress responses (Polle and Schützendü-bel 2004).…”

Section: Heavy Metals Induced Aquaporins/transportersmentioning

confidence: 98%

“…The MAPK pathway is universally involved in the transduction of extracellular signals to intracellular targets in all eukaryotes (Li et al 2006) and helps to pass on the cytoplasmic signal to nucleus, where they activate other protein kinases, specific transcription factors and regulatory proteins (McCully 1999;Shao et al 2008). It was recently indicated that Cd and Cu activate four different MAPKs (SIMK, MMK2, MMK3, and SAMK) in Alfalfa, whereas Cd induces one such kinase (AtMEKK1) in Arabidopsis and one (Os-MAPK2) in rice (Shao et al 2010) suggesting the role of MAPKs in HM signalling. However, it is not clear if activation of MAPKs occurs by these HMs or ROS or it occurs via action of other mediators and therefore, the MAPK responsiveness may differ depending on the type of metals and ROS involved.…”

Section: Heavy Metals Induced Signaling Protein Kinasesmentioning

confidence: 98%

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Molecular mechanistic model of plant heavy metal tolerance

et al. 2012

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Plants being sessile are susceptible to heavy metals (HMs) toxicity and respond differentially to hostile environments. The toxicity of HM is governed by the type of ion and its concentration, plant physiology and stage of plant growth. Plants counteract the HMs stress by overexpressing numerous stress related proteins, glutathione mediated tolerance pathways and signaling proteins involving networks of various stress regulations. Though the response may vary and be specific in its stress networks regulation for each HM. The intricacy of HM tolerance response involves the set of molecular regulation, which demands to be understood to yield HM tolerant plant. Topical advancements in molecular biology and genomics have facilitated studies in transcriptomics and proteomics to identify regulatory genes implied in HM tolerance in plants. The integration of resources obtained through these studies will be of extreme significance, combining the diverse fields of plant biology to dissect the actual HM stress response network. In this review, we put an endeavor to describe the specific aspects of the molecular mechanisms of a plant response to HMs which may contribute to better understanding of the mode of HMs action and overlaps in metal sensing and signaling/crosstalk to other stresses.

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Section: Heavy Metals Induced Aquaporins/transportersmentioning

confidence: 98%

Section: Heavy Metals Induced Signaling Protein Kinasesmentioning

confidence: 98%

Molecular mechanistic model of plant heavy metal tolerance

et al. 2012

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“…Heavy metals pose a major threat to the environment, and their toxicity is becoming an increasingly urgent concern due to its implications for the ecosystem, evolution, nutrition, and the environment. Even at low concentrations, they are toxic or harmful [ 14 , 15 ], and the accumulation of heavy metals in soil is a concern in agricultural production [ 16 ], which has an adverse effect on the environment of plants and their metabolic activities, as well as on soil organisms [ 17 ]. Heavy metals can enter the human body by way of the food chain.…”

Section: Introductionmentioning

confidence: 99%

The Easily Overlooked Effect of Global Warming: Diffusion of Heavy Metals

Xiao,

Zhang,

Chen

et al. 2024

Toxics

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Since industrialization, global temperatures have continued to rise. Human activities have resulted in heavy metals being freed from their original, fixed locations. Because of global warming, glaciers are melting, carbon dioxide concentrations are increasing, weather patterns are shifting, and various environmental forces are at play, resulting in the movement of heavy metals and alteration of their forms. In this general context, the impact of heavy metals on ecosystems and organisms has changed accordingly. For most ecosystems, the levels of heavy metals are on the rise, and this rise can have a negative impact on the ecosystem as a whole. Numerous studies have been conducted to analyze the combined impacts of climate change and heavy metals. However, the summary of the current studies is not perfect. Therefore, this review discusses how heavy metals affect ecosystems during the process of climate change from multiple perspectives, providing some references for addressing the impact of climate warming on environmental heavy metals.

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“…Metal hyperaccumulators are mostly slow-growing plants with a small biomass, limiting the efficacy of phytoextraction in remediating metal-contaminated sites [6]. Plant growth and biomass production in contaminated soils, and thereby phytoextraction efficiency, can be improved by utilizing plant growth-promoting rhizobacteria (PGPR).…”

Section: Introductionmentioning

confidence: 99%

Isolation and Characterization of Pb-Solubilizing Bacteria and Their Effects on Pb Uptake by Brassica juncea: Implications for Microbe-Assisted Phytoremediation

Yahaghi

Shirvani

Nourbakhsh

et al. 2018

Journal of Microbiology and Biotechnology

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The aim of this study was to isolate and characterize lead (Pb)-solubilizing bacteria from heavy metal-contaminated mine soils and to evaluate their inoculation effects on the growth and Pb absorption of Brassica juncea. The isolates were also evaluated for their plant growthpromoting characteristics as well as heavy metal and salt tolerance. A total of 171 Pb-tolerant isolates were identified, of which only 15 bacterial strains were able to produce clear haloes in solid medium containing PbO or PbCO 3 , indicating Pb solubilization. All of these 15 strains were also able to dissolve the Pb minerals in a liquid medium, which was accompanied by significant decreases in pH values of the medium. Based on 16S rRNA gene sequence analysis, the Pb-solubilizing strains belonged to genera Bacillus, Paenibacillus, Brevibacterium, and Staphylococcus. A majority of the Pb-solubilizing strains were able to produce indole acetic acid and siderophores to different extents. Two of the Pb-solubilizing isolates were able to solubilize inorganic phosphate as well. Some of the strains displayed tolerance to different heavy metals and to salt stress and were able to grow in a wide pH range. Inoculation with two selected Pb-solubilizing and plant growth-promoting strains, (i.e., Brevibacterium frigoritolerans YSP40 and Bacillus paralicheniformis YSP151) and their consortium enhanced the growth and Pb uptake of B. juncea plants grown in a metal-contaminated soil. The bacterial strains isolated in this study are promising candidates to develop novel microbe-assisted phytoremediation strategies for metal-contaminated soils.

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Perspective on Phytoremediation for Improving Heavy Metal-Contaminated Soils

Cited by 12 publications

References 64 publications

Molecular mechanistic model of plant heavy metal tolerance

Molecular mechanistic model of plant heavy metal tolerance

The Easily Overlooked Effect of Global Warming: Diffusion of Heavy Metals

Isolation and Characterization of Pb-Solubilizing Bacteria and Their Effects on Pb Uptake by Brassica juncea: Implications for Microbe-Assisted Phytoremediation

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