Research & Reviews: Journal of Ecology and Environmental Sciences
MenuISSN: 2347-7830
ISSN: 2347-7830
+44-7723-59-8358 Nandana C*, Rohini A
Department of Biochemistry, RVS College of Arts and Science, Coimbatore, India
Received: 23-Oct-2024, Manuscript No. JEAES-24-150761; Editor assigned: 25-Oct-2024, Pre QC No. JEAES-24-150761 (PQ); Reviewed: 08-Nov-2024, QC No. JEAES-24-150761; Revised: 06-oct-2025, Manuscript No. JEAES-24-150761 (R); Published: 13-oct-2025, DOI: 10.4172/2347-7830.13.1.002
Citation: Bhowmick R, et al. Therapeutic Potentiality and Nutritional Value of Gynura Procumbens in Recent Scientific Reviews. J Agri Allied Sci. 2025;14:005.
Copyright: © 2025 Bhowmick R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.
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The growing amount of pollutants in the environment, especially dangerous substances like pesticides, heavy metals, plastics, and hydrocarbons, endangers both human health and ecosystems. These pollutants are difficult to remove using conventional procedures because they are persistent and mostly originate from industrial, agricultural, and urban activities. By using the natural metabolic processes of bacteria, fungi, and algae to degrade and purify these pollutants, microbial biodegradation provides an effective and environmentally beneficial substitute. The mechanisms by which microorganisms break down different contaminants are reviewed in this article, with an emphasis on enzymatic reactions like hydrolases, reductases, and oxygenases that help break down complicated hazardous chemicals into less dangerous forms. Fungi like Aspergillus and bacterial species like Pseudomonas and Bacillus are essential to the degradation process. Furthermore, the application of microbial consortia—synergistic communities of microorganisms has demonstrated improved capacities for biodegradation, especially when it comes to combined contaminants. Recent developments in biotechnology, such as omics technologies, synthetic biology, and genetic engineering, have increased the scalability and efficiency of microbial biodegradation processes.
Microbial biodegradation; Bioremediation; Pseudomonas; Bacillus; Bioaccumulation; Enzymatic degradation
Environmental pollution poses an escalating worldwide issue, impacting both ecosystems and human health. Biodegradation, a process where microorganisms convert hazardous materials into safer compounds, has emerged as a sustainable and environmentally friendly solution to combat pollution. Microorganisms, including bacteria, fungi, and algae, can break down a variety of pollutants such as heavy metals, hydrocarbons, pesticides, and organic toxins like nicotine and Tobacco-Specific Nitrosamines (TSNAs).
Microbial bioremediation has distinct advantages over traditional chemical and physical remediation methods, which may leave pollutants behind and cause further environmental harm. For example, certain bacteria such as Pseudomonas and Bacillus have shown remarkable capabilities in degrading both organic and inorganic pollutants. Bacillus species can detoxify heavy metals through bioaccumulation and enzymatic oxidation, while Pseudomonas species effectively break down hydrocarbons from oil spills. Research by Xu et al. [1] discusses how microorganisms metabolize various toxic pollutants, including hydrocarbons, Polychlorinated Biphenyls (PCBs), and phenols, highlighting Pseudomonas and Bacillus for their proficiency in transforming complex pollutants into harmless forms. The study also examines pollutant bioavailability and its influence on microbial degradation efficiency in terrestrial and aquatic environments, along with the potential of bioengineering and genetic modification to enhance microbial capabilities.
Role of microorganisams in pollutant biodegradation
Effectiveness of microorganisms in bioremediation, focusing on the ecological advantages of utilizing bacteria, fungi, and algae to break down pollutants. The authors examine various bacterial strains, including Pseudomonas and Bacillus, which can transform toxic substances into less harmful forms through bioaccumulation, enzymatic oxidation, and other processes. For instance, Bacillus cereus is employed in the remediation of heavy metals, where it aids in microbial immobilization, making metal ions less available in contaminated soils. Furthermore, the paper investigates enzymatic oxidation as a technique to degrade organic pollutants, including dyes and phenols, through enzymes like laccase, generating radicals that further decompose into non-toxic components, significantly lowering levels of environmental pollution.
Organic and in-organic pollutnats: Crucial function of microorganisms in the biodegradation of both organic and inorganic pollutants. The research highlights the influence of Plant Growth-Promoting Rhizobacteria (PGPR) in the biodegradation process. These microorganisms not only promote plant growth but also aid in the breakdown of pollutants such as hydrocarbons, nitrates, and heavy metals. The study illustrates how bacteria like Pseudomonas and Bacillus enhance soil fertility by decomposing complex organic pollutants into simpler compounds that can be absorbed by plants. Additionally, the authors consider the potential of genetically modified microorganisms to improve biodegradation efficiency by targeting specific pollutants more effectively. Integrating PGPR into agricultural and environmental management practices is viewed as a promising strategy for achieving sustainable pollution management.
The breakdown of hydrocarbons in oil spills can be achieved using bacteria like Pseudomonas and Rhodococcus, which can metabolize both aliphatic and aromatic hydrocarbons, making them essential for oil spill remediation. This research emphasizes the influence of environmental conditions, such as nutrient and oxygen levels, on microbial hydrocarbon degradation, as well as the significance of bioaugmentation (introducing microbial cultures) to improve the degradation process in contaminated areas [2].
Microplastic biodegradation: Microorganisms, especially bacteria such as Pseudomonas species, play a crucial role in breaking down synthetic plastics through the process of biodegradation, which includes stages like biodeterioration and biofragmentation. During this process, microbial enzymes decompose long-chain polymers into simpler molecules that ultimately mineralize into carbon dioxide, methane, and water. The paper underscores how this environmentally friendly approach provides a cost-effective alternative to conventional waste management methods, like incineration and landfilling, which can cause environmental harm. It also emphasizes the specific strains of microorganisms and their metabolic pathways involved in plastic degradation [3].
Research on microbial degradation of microplastics, particularly by bacteria such as Bacillus and Pseudomonas, has focused on how these microorganisms can break down plastics using enzymes like hydrolases and alkane hydroxylases. The authors highlight environmental factors that impact microbial plastic breakdown, such as polymer type and the presence of other organic material (Figure 1). Despite progress, they note that fully understanding the plastic biodegradation process remains a challenge, as presented by Yuan et al. [4].
Figure 1. Diagram showing how bacteria break down environmental microplastics through enzymatic biodegradation.
Microbial bioremediation of heavy metals: Moreover, studies emphasize the ability of Pseudomonas and Bacillus species to degrade heavy metals in contaminated soils and water. These bacteria can convert toxic metals like lead, cadmium, and mercury into less harmful forms through processes including bioaccumulation and biomineralization. The role of bioreactors in optimizing these microbial processes for industrial applications is also discussed, according to Gupta et al. (Figure 2) [5].
Figure 2. Overview of key metal–microbe interactions, including biosorption, bioleaching, biotransformation, bioaccumulation, and biomineralization.
Aspergillus, Bacillus, and Pseudomonas are among the bacterial and fungal species that can withstand high concentrations of heavy metals and transform them into less harmful forms. Particularly for metals like lead and cadmium, biosorption-a passive process that involves the binding of metals to components of cell surfaces-is a mechanism that has been extensively researched. Microorganisms are able to live in severely polluted settings through the process of active bioaccumulation, which involves the uptake and intracellular sequestration of metals. The potential for heavy metal bioremediation is further increased by the capacity of some microbial enzymes, such as reductases and oxidases, to change metals into less soluble or volatile forms [6,7].
Advance in microbial bioremediation
Discuss the microbial degradation of pharmaceutical pollutants in wastewater, an increasing environmental issue.
Pseudomonas and Bacillus species are recognized for their capability to break down complex pharmaceutical substances, which helps reduce the toxicity of contaminants like antibiotics and anti-inflammatory medications. This study investigates the use of biofilm reactors to enhance the effectiveness of pharmaceutical biodegradation and examines the future prospects of employing genetically modified microbes in wastewater treatment [8].
Explore how microbial enzymes contribute to the breakdown of pesticides, fertilizers, and other pollutants in agricultural soils. Bacteria such as Bacillus and Rhizobium are known for their ability to degrade harmful chemicals and improve soil quality. The findings highlight the potential for these microorganisms to foster sustainable agricultural practices and mitigate environmental pollution caused by the overuse of agrochemicals [9].
Address the critical issue of plastic pollution in marine environments, emphasizing the role microorganisms, particularly Bacillus and Rhodococcus, play in plastic degradation. These bacteria produce enzymes that convert plastics into simpler compounds that can be further processed. The article 3 including salinity and temperature, and discusses promising biotechnological strategies to enhance microbial activity in marine ecosystems [10].
The review by Inbaraj and Tripathi [11] discusses microbial bioremediation strategies for addressing emerging pollutants such as heavy metals and xenobiotics. It highlights the detoxifying and degrading capabilities of various microorganisms, both aerobic and anaerobic, turning pollutants into less harmful substances. Various bioremediation techniques, including in situ and ex situ methods, are examined, along with the need to choose suitable approaches based on the types and concentrations of pollutants. The review concludes by addressing the future potential and challenges in the field of microbial bioremediation.
Explore microbial processes for detoxifying and removing pollutants from various environmental matrices, spotlighting recent advancements in biosorption and bioaccumulation technologies-particularly for heavy metals and persistent organic pollutants. The discussion extends to the promise of Genetically Engineered Microorganisms (GEMs) to improve biodegradation efficiency and innovative approaches for enhancing microbial interactions with environmental contaminants, noting that although there has been laboratory success, scaling these methods for broader environmental use poses challenges [12].
Challenges effect microbial biodegradation
Focus on the metabolic pathways that microorganisms use to degrade environmental pollutants, highlighting key enzymes and the factors influencing microbial efficiency, such as nutrient availability and environmental conditions. The potential of engineered microbes to boost the breakdown of persistent and toxic compounds is also emphasized [13].
Investigate how heavy metals affect microbial communities and their adaptive detoxification strategies. They detail mechanisms such as enzymatic detoxification and the significance of biofilms in improving bioremediation efficiency while discussing in situ and ex situ bioremediation methods [14].
Examine the dynamic interactions between microorganisms and their surroundings during bioremediation, evaluating factors like nutrient competition and environmental conditions, along with the potential uses of genetically modified organisms in remediation efforts [15].
Microorganisms play a crucial role in degrading heavy metals through both in situ and ex situ bioremediation methods. They detoxify these pollutants by utilizing them as nutrients or by mitigating their toxicity via enzymatic processes. The paper highlights the detrimental effects of heavy metals on microbial activity, including DNA and protein damage, which complicates the degradation process. In situ bioremediation methods, especially those employing native microorganisms and biosparging techniques, have proven particularly effective in specific contaminated sites.
This special issue also explores the application of omics techniques-such as genomics, proteomics, and metabolomics-to study microbial biodegradation mechanisms, enhancing our understanding of the enzymes and metabolic pathways involved in degrading pollutants for improved biotechnological applications. The review illustrates how these tools can pinpoint key microbes responsible for biodegradation, thereby increasing the efficiency of bioremediation strategies in natural ecosystems.
Furthermore, a review on novel microbial bioremediation methodologies for both organic and inorganic pollutants underscores the significance of utilizing engineered microbial strains to boost biodegradation effectiveness. It includes case studies highlighting the successful application of microbes in detoxifying heavy metals, eliminating organic pollutants, and degrading pharmaceutical residues while addressing the challenges presented by varying environmental conditions, and how biotechnological innovations can help overcome these obstacles [16-20].
Microbial biodegradation presents an innovative and sustainable strategy for addressing the increasing issue of environmental pollution worldwide. By utilizing the enzymatic abilities of microorganisms like Pseudomonas, Bacillus, and Aspergillus, various pollutants, including hydrocarbons and heavy metals, can be efficiently detoxified and converted into less harmful forms. The integration of microbial consortia and recent strides in genetic engineering and synthetic biology has greatly improved the effectiveness of pollutant degradation, even under challenging environmental conditions. Nonetheless, there are still obstacles to deploying these technologies for industrial and large-scale use due to variations in environmental factors and microbial survival. Ongoing research into omics technologies, fine-tuning bioremediation approaches, and creating genetically modified microorganisms will be vital in addressing these challenges. In conclusion, microbial biodegradation has significant potential as a key element in global initiatives for pollution management and environmental recovery, providing a more sustainable and cost-effective alternative to conventional remediation techniques.