Role of Plant Growth Promoting Bacteria (PGPB) for Bioremediation of Heavy Metals

Cellular Mechanisms ◽

Metals Removal ◽

Pollution Problem ◽

Plant Growth Promoting ◽

The heavy metal pollution problem is all over the world. Plant growth promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of PGPB for remediation of heavy metals, their mechanism of action, and their applications approach of hyperaccumulation. Further, it also highlights the role of uptake and detoxification of metals by cellular mechanisms which facilitate the bioremediation of heavy metals from contaminated areas. Bacteria may also enhance nutrient uptake, increasing plant growth and defenses while diminish heavy metals intake and their toxic effects. Therefore, this chapter focuses on the mechanisms by which microorganisms can mobilize or immobilize metals in soils and the bioremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.

Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials ◽

Newer Approaches in Phytoremediation

10.4018/978-1-7998-8591-7.ch074 ◽

2021 ◽

pp. 1785-1808

Author(s):

Khushboo Chaudhary ◽

Suphiya Khan ◽

Pankaj Kumar Saraswat

Keyword(s):

Heavy Metals ◽

Plant Growth ◽

Chelating Agents ◽

Metals Removal ◽

Pollution Problem ◽

The World ◽

Plant Growth Promoting ◽

The heavy metal pollution problem is all over the world. Plant-growth-promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of plant-growth-promoting bacteria, chelating agents, and nanoparticles for remediation of heavy metals; their mechanism of action; and their applications approach of hyperaccumulation. Therefore, this chapter focuses on the mechanisms by which microorganisms, chelating agents, and nanoparticles can mobilize or immobilize metals in soils and the nano-phytoremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.

Nano-Phytoremediation Technologies for Groundwater Contaminates - Advances in Environmental Engineering and Green Technologies ◽

Newer Approaches in Phytoremediation

10.4018/978-1-5225-9016-3.ch011 ◽

2020 ◽

pp. 145-178

Keyword(s):

Heavy Metals ◽

Plant Growth ◽

Chelating Agents ◽

Metals Removal ◽

Pollution Problem ◽

The World ◽

Plant Growth Promoting ◽

Role of plant growth promoting bacteria in driving speciation gradients across soil-rhizosphere-plant interfaces in zinc-contaminated soils

Environmental Pollution ◽

10.1016/j.envpol.2021.116909 ◽

2021 ◽

pp. 116909

Author(s):

Nyekachi C. Adele ◽

Bryne T. Ngwenya ◽

Kate V. Heal ◽

J. Frederick W. Mosselmans

Keyword(s):

Plant Growth ◽

Contaminated Soils ◽

Plant Growth Promoting ◽

Soil Rhizosphere ◽

Molecular Insight Into Key Eco-Physiological Process in Bioremediating and Plant-Growth-Promoting Bacteria

Frontiers in Agronomy ◽

10.3389/fagro.2021.664126 ◽

2021 ◽

Vol 3 ◽

Author(s):

Subhrangshu Mandal ◽

Kunal Kumar Saha ◽

Narayan Chandra Mandal

Keyword(s):

Heavy Metals ◽

Plant Growth ◽

Agricultural Sector ◽

Cost Effective ◽

Anthropogenic Activity ◽

Genetic Landscape ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Legal Constraints

Over the past few decades, the massive increase in anthropogenic activity and industrialization processes has increased new pollutants in the environment. The effects of such toxic components (heavy metals, pesticides, etc.) in our ecosystem vary significantly and are of significant public health and economic concern. Because of this, environmental consciousness is increasing amongst consumers and industrialists, and legal constraints on emissions are becoming progressively stricter; for the ultimate aim is to achieve cost-effective emission control. Fortunately, certain taxonomically and phylogenetically diverse microorganisms (e.g., sulfur oxidizing/reducing bacteria) are endowed with the capability to remediate such undesired components from diverse habitats and have diverse plant-growth-promoting abilities (auxin and siderophore production, phosphate solubilization, etc.). However, the quirk of fate for pollutant and plant-growth-promoting microbiome research is that, even with an early start, genetic knowledge on these systems is still considered to be in its infancy due to the unavailability of in-depth functional genomics and population dynamics data from various ecosystems. This knowledge gap can be breached if we have adequate information concerning their genetic make-up, so that we can use them in a targeted manner or with considerable operational flexibility in the agricultural sector. Amended understanding regarding the genetic basis of potential microbes involved in such processes has led to the establishment of novel or advanced bioremediation technologies (such as the detoxification efficiency of heavy metals), which will further our understanding of the genomic/genetic landscape in these potential organisms. Our review aimed to unravel the hidden genomic basis and eco-physiological properties of such potent bacteria and their interaction with plants from various ecosystems.