Mitigation of Benzoic Acid-Driven Autotoxicity in Waste Nutrient Solutions Using Ozone-Based Treatment: Seed Germination and Root Growth of Lactuca Sativa L

Han, Uijeong; Lee, Yong-Gu; Byeon, Ji-Hui; Chon, Kangmin; Cho, Si-Kyung

doi:10.2139/ssrn.4326268

Cited by 3 publications

(3 citation statements)

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“…In this study, compared with the CK group, with increased BA addition, the content of total nitrogen (TN), available nitrogen (AN), available phosphorus (AP), and available potassium (AK) increased, indicating that the plant root system is not lacking in nutrients; rather, its ability to absorb and utilize nutrients is reduced. This is consistent with Blum’s report that BA inhibits nutrient absorption in plant roots, leading to growth inhibition [ 34 ]. Based on the results of the perilla root weight experiment, we speculate that due to the addition of BA, the pH of the root soil decreases, and the transportation of substances inside and outside the cell membrane slows down, resulting in weakened plant root absorption functions in relation to nutrients, and even peroxidation reactions.…”

Section: Discussionsupporting

confidence: 93%

The Effects of Exogenous Benzoic Acid on the Physicochemical Properties, Enzyme Activities and Microbial Community Structures of Perilla frutescens Inter-Root Soil

Xue,

Fang,

et al. 2024

Microorganisms

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This study analyzed the effects of benzoic acid (BA) on the physicochemical properties and microbial community structure of perilla rhizosphere soil. The analysis was based on high-throughput sequencing technology and physiological and biochemical detection. The results showed that with the increase in BA concentration, soil pH significantly decreased, while the contents of total nitrogen (TN), alkaline nitrogen (AN), available phosphorus (AP), and available potassium (AK) significantly increased. The activities of soil conversion enzymes urease and phosphatase significantly increased, but the activities of catalase and peroxidase significantly decreased. This indicates that BA can increase soil enzyme activity and improve nutrient conversion; the addition of BA significantly altered the composition and diversity of soil bacterial and fungal communities. The relative abundance of beneficial bacteria such as Gemmatimonas, Pseudolabrys, and Bradyrhizobium decreased significantly, while the relative abundance of harmful fungi such as Pseudogymnoascus, Pseudoeurotium, and Talaromyces increased significantly. Correlation analysis shows that AP, AN, and TN are the main physicochemical factors affecting the structure of soil microbial communities. This study elucidates the effects of BA on the physicochemical properties and microbial community structure of perilla soil, and preliminarily reveals the mechanism of its allelopathic effect on the growth of perilla.

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Section: Discussionsupporting

confidence: 93%

The Effects of Exogenous Benzoic Acid on the Physicochemical Properties, Enzyme Activities and Microbial Community Structures of Perilla frutescens Inter-Root Soil

Xue,

Fang,

et al. 2024

Microorganisms

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“…The most potent inhibitor among phytotoxic exudates is benzoic acid which is known to inhibit growth and other vital plant processes at lowest concentration. It was investigated that O3 treatment alone is not suitable for removing benzoic acid from the nutrient solution of lettuce grown hydroponics; O3/ H2O2 treatment is effective for mitigating autotoxicity and degrading benzoic acid [28]. Microbial degradation of allelochemicals is another effective method which involves use of microbial strains belonging to different genotypes for successful elimination of phytochemicals.…”

Section: Degradation Of Root Exudates In Hydroponicsmentioning

confidence: 99%

Bioassay of Root Exudates, their Impact in Susceptible Species and their Degradation in Hydroponics: A Review

Kaur,

Prince,

Dilshad

et al. 2024

JOBAN

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Plants grown in hydroponics exhibit superior characters and yield compared to those grown in soil. However, root exudates accumulated particularly in renewed nutrient solution (RNS) hinders development of crops in hydroponics. These exudates are secondary metabolites released by the roots as a result of physiological processes, exhibiting autotoxic effects in plants. They are allelochemicals encompassing various chemical groups such as phenolic compounds, terpenoids, alkaloids, benzoxazinoids or other organic acids. The quantity and type of allelochemical released by plants varies depending on multiple factors such as temperature, light, nutrient deficiency, stress, physiological status of plant, pH and environment. The combined effect of more than one allelochemical is often additive or synergistic thus elevating the impact caused by individual allelochemical. These phytotoxic exudates are known to have inhibited the growth and development of plants by diverse pathways unique to their characteristic. There are several methods developed for degradation of exudates including AC (Activated Charcoal), O3/H2O2 treatment or other. This review discusses the bioassay of secondary metabolites causing autotoxicity, mechanism, impact in horticultural and ornamental crops, factors affecting their release and methods for elimination in hydroponics.

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“…In this context, achieving zero discharge of hydroponic wastewater has become a significant trend, necessitating the adoption of innovative methods to treat and reduce nitrogen and phosphorus emissions in wastewater (Chakraborty et al, 2023). For hydroponic systems, based on whether the excess nutrient solution is recycled, they can be classified into open systems and closed systems (Han et al, 2023; Hosseinzadeh et al, 2017). In open systems, the nutrient solution is discharged after a single use, which may result in significant point source pollution (Richa et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The impact of benzoic acid and lactic acid on the treatment efficiency and microbial community in the sulfur autotrophic denitrification process

Du,

Xu,

et al. 2024

Water Environment Research

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Nitrate poses a potential threat to aquatic ecosystems. This study focuses on the sulfur autotrophic denitrification mechanism in the process of water culture wastewater treatment, which has been successfully applied to the degradation of nitrogen in water culture farm effluents. However, the coexistence of organic acids in the treatment process is a common environmental challenge, significantly affecting the activity of denitrifying bacteria. This paper aims to explore the effects of adding benzoic acid and lactic acid on denitrification performance, organic acid removal rate, and microbial population abundance in sulfur autotrophic denitrification systems under optimal operating conditions, sulfur deficiency, and high hydraulic load. In experiments with 50 mg·L−1 of benzoic acid or lactic acid alone, the results show that benzoic acid and lactic acid have a stimulating effect on denitrification activity, with the stimulating effect significantly greater than the inhibitory effect. Under optimal operating conditions, the average denitrification rate of the system remained above 99%; under S/N = 1.5 conditions, the average denitrification rate increased from 88.34% to 91.93% and 85.91%; under HRT = 6 h conditions, the average denitrification rate increased from 75.25% to 97.79% and 96.58%. In addition, the addition of organic acids led to a decrease in microbial population abundance. At the phylum level, Proteobacteria has always been the dominant bacterial genus, and its relative abundance significantly increased after the addition of benzoic acid, from 40.2% to 61.5% and 62.4%. At the genus level, Thiobacillus, Sulfurimonas, Chryseobacterium, and Thermomonas maintained high population abundances under different conditions.Practitioner Points Employing autotrophic denitrification process for treating high‐nitrate wastewater. Utilizing organic acids as external carbon sources. Denitrifying bacteria demonstrate high utilization efficiency towards organic acids. Organic acids promote denitrification more than they inhibit it. The promotion is manifested in the enhancement of activity and microbial abundance.

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Mitigation of Benzoic Acid-Driven Autotoxicity in Waste Nutrient Solutions Using Ozone-Based Treatment: Seed Germination and Root Growth of Lactuca Sativa L

Cited by 3 publications

References 0 publications

The Effects of Exogenous Benzoic Acid on the Physicochemical Properties, Enzyme Activities and Microbial Community Structures of Perilla frutescens Inter-Root Soil

The Effects of Exogenous Benzoic Acid on the Physicochemical Properties, Enzyme Activities and Microbial Community Structures of Perilla frutescens Inter-Root Soil

Bioassay of Root Exudates, their Impact in Susceptible Species and their Degradation in Hydroponics: A Review

The impact of benzoic acid and lactic acid on the treatment efficiency and microbial community in the sulfur autotrophic denitrification process

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