Impact of soil-water contaminants on tropical agriculture, animal and societal environment

Ghosh, Avijit; Manna, M. C.; Jha, Shankar; Singh, Amit Kumar; Misra, Sukanya; Srivastava, R. C.; Srivastava, Prem Prakash; Laik, Ranjan; Bhattacharyya, Ranjan; Prasad, Surendra; Singh, Sonu; Singh, Santosh Kumar; Kumar, Vipin; Tiwari, Sanjay; Singh, Ashok K.

doi:10.1016/bs.agron.2022.07.006

Cited by 6 publications

(2 citation statements)

References 82 publications

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“…Nine keystone species were identified on the genus level (Figure S7) that also corroborated microbial habitat difference (Figure 2C) and corresponding metabolic preference. Two of the keystone species (g_Rhodanobacter and g_Azospira) were shared in both habitats, in which g_Rhodanobacter associated with denitrification 80 was also identified as a habitat generalist.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

Enhanced Bacterium–Phage Symbiosis in Attached Microbial Aggregates on a Membrane Surface Facing Elevated Hydraulic Stress

Tan,

Yu,

Huang

et al. 2023

Environ. Sci. Technol.

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Phages are increasingly recognized for their importance in microbial aggregates, including their influence on microbial ecosystem services and biotechnology applications. However, the adaptive strategies and ecological functions of phages in different aggregates remain largely unexplored. Herein, we used membrane bioreactors to investigate bacterium–phage interactions and related microbial functions within suspended and attached microbial aggregates (SMA vs AMA). SMA and AMA represent distinct microbial habitats where bacterial communities display distinct patterns in terms of dominant species, keystone species, and bacterial networks. However, bacteria and phages in both aggregates exhibited high lysogenicity, with 60% lysogenic phages in the virome and 70% lysogenic metagenome-assembled genomes of bacteria. Moreover, substantial phages exhibited broad host ranges (34% in SMA and 42% in AMA) and closely interacted with habitat generalist species (43% in SMA and 49% in AMA) as adaptive strategies in stressful operation environments. Following a mutualistic pattern, phage-carried auxiliary metabolic genes (pAMGs; 238 types in total) presumably contributed to the bacterial survival and aggregate stability. The SMA-pAMGs were mainly associated with energy metabolism, while the AMA-pAMGs were mainly associated with antioxidant biosynthesis and the synthesis of extracellular polymeric substances, representing habitat-dependent patterns. Overall, this study advanced our understanding of phage adaptive strategies in microbial aggregate habitats and emphasized the importance of bacterium–phage symbiosis in the stability of microbial aggregates.

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Section: ■ Results and Discussionmentioning

confidence: 98%

Enhanced Bacterium–Phage Symbiosis in Attached Microbial Aggregates on a Membrane Surface Facing Elevated Hydraulic Stress

Tan,

Yu,

Huang

et al. 2023

Environ. Sci. Technol.

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“…For instance, to ensure global food security by 2050, food production must rise by up to 70% [7,12]. To meet this demand, agricultural practices have become more intensive, leading to increased use of pesticides, fertilizers, and other chemicals [13][14][15][16]. Consequently, significant volumes of these fertilizers, including nitrogen (N), phosphorus (P), potassium (K), and compound/mixed variants, are regularly applied to agricultural soils to ensure adequate macronutrient supply [6,17].…”

Section: Introductionmentioning

confidence: 99%

Geochemical Signature and Risk Assessment of Potential Toxic Elements in Intensively Cultivated Soils of South-West Punjab, India

Chaudhari,

Kumari,

Tyagi

et al. 2024

Minerals

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Soil contamination with potentially toxic elements (PTEs) in the Malwa region belt of Punjab, India, can be a serious concern as a result of intensive agricultural practices and overuse of agrochemicals. The main objectives of the present study were to evaluate the spatial distribution, geochemical signature, and contamination level/health risk of PTEs in 76 soil samples (0–10 cm) collected from the three districts viz. Muktar, Faridkot, and Moga of Punjab, India. The result shows that PTEs concentrations vary widely in the region, with Fe and Mn distribution patterns being mostly coherent with each other. When compared to the Indian natural soil background values, the average concentration of Pb and Zn were higher than the limit, only Pb exceeded the average values of the world background and upper continental crust (UCC). Spatial autocorrelation plotted with a local indicator of spatial association (LISA) in GeoDa software version 1.18 was used to identify hotspots. A positive spatial autocorrelation (>0.2) was indicated with Moran’s I values for Pb, V, Mn, Cu, and Cr, being highest for Pb. A principal component analysis (PCA) identified the major geo-chemical patterns of Fe-Al-V-Cr and TOC-Mn-Zn-HCO3−, which were positively loaded on PC1. This indicates that Fe/Al-oxyhydroxides and organic matter play a dominant role in controlling metal mobility in soils. This can be further substantiated with the Spearman’s rank correlation values. The contamination factor indicates that only Pb and Zn (15.7% and 3.9% samples, respectively) were under high risk. This could be due to the excessive application of chemical fertilizers. The large range of Cdeg values suggests that there are variations in the degree of soil pollution due to PTEs. A little over 3.9% of samples had significant contamination, compared to 72.3% of samples with low contamination and 23.6% of samples with moderate contamination. Human non-carcinogenic and carcinogenic risk levels were investigated. The HI values for adult ranged from 0.00 to 0.2, and values for children ranged from 0.009 to 1.2. These findings suggest that both children and adults are not at potential risk, except in a few locations. Overall, the results of this study provide the current baseline status of toxic elements in agricultural soil. This would be helpful for developing strategies for sustainable management of the soil resources in the region, as well as for future monitoring programs of the soil quality in the Malwa region as a whole, to track any changes in the contamination levels over time.

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Transfer of antibiotic resistance genes from soil to wheat: Role of host bacteria, impact on seed-derived bacteria, and affecting factors

Shen,

Liu,

et al. 2023

Science of The Total Environment

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Impact of soil-water contaminants on tropical agriculture, animal and societal environment

Cited by 6 publications

References 82 publications

Enhanced Bacterium–Phage Symbiosis in Attached Microbial Aggregates on a Membrane Surface Facing Elevated Hydraulic Stress

Enhanced Bacterium–Phage Symbiosis in Attached Microbial Aggregates on a Membrane Surface Facing Elevated Hydraulic Stress

Geochemical Signature and Risk Assessment of Potential Toxic Elements in Intensively Cultivated Soils of South-West Punjab, India

Transfer of antibiotic resistance genes from soil to wheat: Role of host bacteria, impact on seed-derived bacteria, and affecting factors

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