Plant growth-promoting rhizobacteria as bioremediators of polluted agricultural soils: challenges and prospects

Majeed, Abdul; Muhammad, Zahir; Ullah, Rehman; Ullah, Kaleem; Husnain, Ali; Inayat, Naila

doi:10.1016/b978-0-323-91632-5.00012-4

Cited by 5 publications

(4 citation statements)

References 68 publications

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“…Pseudomonas and Hydrogenophaga were the second and third most abundant genus. While Pseudomonas promotes plant growth and phytopathogen control, Hydrogenophaga modifies pollutants through enzymic activities and transforms them into less toxic substances ( Sah et al, 2021 ; Majeed et al, 2022 ). SMX did not have noticeable impacts on the abundance of Pseudomonas and Hydrogenophaga .…”

Section: Resultsmentioning

confidence: 99%

Impacts of sulfamethoxazole stress on vegetable growth and rhizosphere bacteria and the corresponding mitigation mechanism

Ren,

Lu,

et al. 2024

Front. Bioeng. Biotechnol.

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Antibiotics are an important pharmaceutical class excessively used by humans. Its presence in the soil can impact plant growth and induce antibiotic resistance. This research studies the effect of sulfamethoxazole (SMX) on plant growth, rhizosphere bacteria composition, and resistance genes. Two sets of vegetables (basil, cilantro, and spinach) were treated separately with water and SMX solution. The plant growth data and soil samples were collected and analyzed. The results revealed that SMX increased spinach leaf length (34.0%) while having no significant impacts on basil and cilantro. On the other hand, SMX improved the bacterial diversity in all samples. The shifts in the abundance of plant growth-promoting bacteria could indirectly affect vegetable stem and leaf length. SMX also significantly increased the abundance of resistance genes Sul1 and Sul2. A further study into the correlation between bacteria highlights the importance of Shingomonas and Alfipia for inhibiting the spread of key resistance gene hosts, namely, Pseudomonas, Stenotrophomonas, and Agrobacterium. This research provides insight into SMX’s impact on vegetable growth and microbial diversity. It also points out important microbial interactions that could potentially be utilized to mitigate ARG proliferation.

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Section: Resultsmentioning

confidence: 99%

Impacts of sulfamethoxazole stress on vegetable growth and rhizosphere bacteria and the corresponding mitigation mechanism

Ren,

Lu,

et al. 2024

Front. Bioeng. Biotechnol.

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“…Table 9 ). ASV00067 comes from a group that is known to biodegrade some pollutants in plants 72 . This ASV had a significant interaction with BaP exposure wherein its abundance was positively associated with light cycle movement for concentrations below 10 µM, and negatively associated with light cycle movement for the 10 µM treatment, although, this relationship does appear to be driven by outliers (Supp.…”

Section: Resultsmentioning

confidence: 99%

The zebrafish gut microbiome influences benzo[a]pyrene developmental neurobehavioral toxicity

Stagaman,

Alexiev,

Sieler

et al. 2024

Sci Rep

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Early-life exposure to environmental toxicants like Benzo[a]pyrene (BaP) is associated with several health consequences in vertebrates (i.e., impaired or altered neurophysiological and behavioral development). Although toxicant impacts were initially studied relative to host physiology, recent studies suggest that the gut microbiome is a possible target and/or mediator of behavioral responses to chemical exposure in organisms, via the gut-brain axis. However, the connection between BaP exposure, gut microbiota, and developmental neurotoxicity remains understudied. Using a zebrafish model, we determined whether the gut microbiome influences BaP impacts on behavior development. Embryonic zebrafish were treated with increasing concentrations of BaP and allowed to grow to the larval life stage, during which they underwent behavioral testing and intestinal dissection for gut microbiome profiling via high-throughput sequencing. We found that exposure affected larval zebrafish microbiome diversity and composition in a manner tied to behavioral development: increasing concentrations of BaP were associated with increased taxonomic diversity, exposure was associated with unweighted UniFrac distance, and microbiome diversity and exposure predicted larval behavior. Further, a gnotobiotic zebrafish experiment clarified whether microbiome presence was associated with BaP exposure response and behavioral changes. We found that gut microbiome state altered the relationship between BaP exposure concentration and behavioral response. These results support the idea that the zebrafish gut microbiome is a determinant of the developmental neurotoxicity that results from chemical exposure.

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“…These pathways regulate the production of various extracellular products, enzymes, or other factors that contribute to cooperative behaviors. This coordination allows microorganisms to behave collectively in response to environmental conditions such as biofilm formation, soil structure, bioremediation, and ecosystem resilience [ 156 , 157 , 158 ]. N-acyl homoserine lactones (AHLs) are indeed a well-documented class of QS molecules.…”

Section: Rhizosphere Communication and Signaling For Soil Healthmentioning

confidence: 99%

Rhizosphere Microorganisms Supply Availability of Soil Nutrients and Induce Plant Defense

Thepbandit,

Athinuwat

2024

Microorganisms

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Plant health is necessary for food security, which is a key determinant of secure and sustainable food production systems. Deficiency of soil nutrients and invasion of plant pathogens or insects are the main destroyers of the world’s food production. Synthetic fertilizers and chemical-based pesticides are frequently employed to combat the problems. However, these have negative impacts on microbial ecosystems and ecosystem functioning. Rhizosphere microorganisms have demonstrated their potency to improve or manage plant nutrients to encourage plant growth, resulting in increased yield and quality by converting organic and inorganic substances around the rhizosphere zone into available plant nutrients. Besides regulating nutrient availability and plant growth enhancement, rhizobacteria or fungi can restrict plant pathogens that cause disease by secreting inhibitory chemicals and boosting plant immunity to combat pests or pathogens. Thus, rhizosphere microorganisms are viewed as viable, alluring economic approaches for sustainable agriculture as biofertilizers and biopesticides. This review provides an overview of the role of rhizosphere microorganisms in soil nutrients and inducing of plant defenses. Moreover, a discussion is presented surrounding the recent consequences of employing these microorganisms and a sustainable strategy towards improving fertilization effectiveness, and encouraging stronger, more pest-resistant plants.

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Plant growth-promoting rhizobacteria as bioremediators of polluted agricultural soils: challenges and prospects

Cited by 5 publications

References 68 publications

Impacts of sulfamethoxazole stress on vegetable growth and rhizosphere bacteria and the corresponding mitigation mechanism

Impacts of sulfamethoxazole stress on vegetable growth and rhizosphere bacteria and the corresponding mitigation mechanism

The zebrafish gut microbiome influences benzo[a]pyrene developmental neurobehavioral toxicity

Rhizosphere Microorganisms Supply Availability of Soil Nutrients and Induce Plant Defense

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