Effects of S-metolachlor on wheat (Triticum aestivum L.) seedling root exudates and the rhizosphere microbiome

Qu, Qian; Yan, Li; Zhang, Zhenyan; Cui, Hengzheng; Zhao, Qianqiu; Liu, Wanyue; Lu, Tao; Qian, Haifeng

doi:10.1016/j.jhazmat.2021.125137

Cited by 47 publications

(20 citation statements)

References 57 publications

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“…Numerous studies have shown that herbicide treatment can induce oxidative stress in many plants. 18 As indicated in Figure 4, exposure to bensulfuron methyl (2×), TBA (2×), and 2,4-D butylate (2×) elevated the SOD (118.8%, 100.3%, and 52.8%) and Pro (93.9%, 33.7%, and 206.8%) activities in roots. Similarly, a 2× dose of bensulfuron methyl, TBA, and 2,4-D butylate enhanced the MDA (31.4%, 40.0%, and 52.8%) and H 2 O 2 (147.1%, 63.3%, and 118.3%) levels in roots while a 2× concentration of IPU, fenoxaprop-p-ethyl, pretilachlor, bensulfuron methyl, TBA, and 2,4-D butylate increased the POD levels by 1.3, 1.6, 3.0, 1.8, 1.2, and 4.1 times in leaves as well as 1.7, 2.0, 2.0, 3.3, 3.4, and 3.9 times in roots, respectively.…”

Section: Physiologicalsupporting

confidence: 92%

“…Numerous studies have shown that herbicide treatment can induce oxidative stress in many plants . As indicated in Figure , exposure to bensulfuron methyl (2×), TBA (2×), and 2,4-D butylate (2×) elevated the SOD (118.8%, 100.3%, and 52.8%) and Pro (93.9%, 33.7%, and 206.8%) activities in roots.…”

Section: Resultsmentioning

confidence: 98%

“…For instance, the treatment of S -metolachlor (S-ME, 4 mg/kg) greatly decreases the root fresh weight and root node numbers in wheat plants, as well as the diversity of the rhizosphere microbiome although the abundance of Rhizobiaceae and Burkholderiaceae increased. According to these findings, plants activated potentially beneficial microorganisms to resist S-ME stress . Furthermore, according to Liu et al, atrazine could not only inhibit the activities of urease, saccharase, and cellulase but also it could act as a major determinant of the relative abundance of the bacterial community .…”

Section: Introductionmentioning

confidence: 95%

“…According to these findings, plants activated potentially beneficial microorganisms to resist S-ME stress. 18 Furthermore, according to Liu et al, atrazine could not only inhibit the activities of urease, saccharase, and cellulase but also it could act as a major determinant of the relative abundance of the bacterial community. 19 Since soil microbial communities play a critical role in the soil ecosystem, 20 the detrimental impacts of pesticides on soil microorganisms are likely to lower soil fertility and agricultural productivity.…”

Section: ■ Introductionmentioning

confidence: 99%

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Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Zhou

Cheng

et al. 2022

J. Agric. Food Chem.

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Frequent and improper use of herbicides disrupts a plant's metabolism, causing oxidative stress that degrades crop quality. However, few studies have examined the inhibitory effects of herbicides on plant growth and defense mechanisms in terms of their impact on soil quality and crop rhizosphere. Therefore, the current study investigated the detrimental impacts of six typical and multilevel herbicides on the microbial community and signal molecules in the soil as well as on the levels of hormones and secondary metabolites in wheat seedlings. Interestingly, bensulfuron-methyl, terbutylazine (TBA), and 2,4-D butylate significantly induced oxidative damage while reducing the number of phytohormones (salicylic acid and jasmonic acid) and secondary metabolites (tricin, quercetin, and caffeic acid) in the roots and leaves compared with the controls, isoproturon, fenoxaprop-p-ethyl, and pretilachlor. At twice the recommended levels (2×), they also decreased the microbial α diversity and, in particular, the abundance of Gammaproteobacteria, Alphaproteobacteria, Actinobacteria, Bacteroidia, Verrucomicrobia, Bacilli, Acidimicrobiia, Deltaproteobacteria, and Gemmatimonadetes by disrupting the level of enzymes (e.g., urease and sucrase) and metabolites (indole-3-acetic acid, salicylic acid, apigenin, 4-hydroxybenzoic acid, DIMBOA, and melatonin) in the rhizosphere soil. Overall, significant exposure to herbicides may inhibit wheat growth by disturbing the microbial composition in the rhizosphere soil and the distribution of secondary metabolites in wheat seedlings.

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Section: Physiologicalsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 95%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Zhou

Cheng

et al. 2022

J. Agric. Food Chem.

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“…The rhizosphere is a highly competitive environment in which microbes exhibit different strategies for survival. Entomopathogenic fungi (EPF) are commonly found in the rhizosphere, using root exudates as a source of nutrition but switching to insects when the opportunity arises [1][2][3][4][5]. EPF form symbiotic relationships with plants, leading to improved plant growth and productivity [1,6].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Volatiles of the Insect Pathogen Metarhizium brunneum

Hummadi

Cetin

Demirbek

et al. 2022

JoF

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Fungal volatile organic compounds (VOCs) represent promising candidates for biopesticide fumigants to control crop pests and pathogens. Herein, VOCs produced using three strains of the entomopathogenic fungus Metarhizium brunneum were identified via GC-MS and screened for antimicrobial activity. The VOC profiles varied with fungal strain, development state (mycelium, spores) and culture conditions. Selected VOCs were screened against a range of rhizosphere and non-rhizosphere microbes, including three Gram-negative bacteria (Escherichia coli, Pantoea agglomerans, Pseudomonas aeruginosa), five Gram-positive bacteria (Micrococcus luteus, Staphylococcus aureus, Bacillus subtilis, B. megaterium, B. thuringiensis), two yeasts (Candida albicans, Candida glabrata) and three plant pathogenic fungi (Pythium ultimum, Botrytis cinerea, Fusarium graminearum). Microbes differed in their sensitivity to the test compounds, with 1-octen-3-ol and isovaleric acid showing broad-spectrum antimicrobial activity. Yeasts and bacteria were inhibited by the same VOCs. Cryo-SEM showed that both yeasts and bacteria underwent some form of “autolysis”, where all components of the cell, including the cell wall, disintegrated with little evidence of their presence in the clear, inhibition zone. The oomycete (P. ultimum) and ascomycete fungi (F. graminearum, B. cinerea) were sensitive to a wider range of VOCs than the bacteria, suggesting that eukaryotic microbes are the main competitors to M. brunneum in the rhizosphere. The ability to alter the VOC profile in response to nutritional cues may assist M. brunneum to survive among the roots of a wide range of plant species. Our VOC studies provided new insights as to how M. brunneum may protect plants from pathogenic microbes and correspondingly promote healthy growth.

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Deciphering the Impact of Acinetobacter sp. SG-5 Strain on Two Contrasting Zea mays L. Cultivars for Root Exudations and Distinct Physio-Biochemical Attributes Under Cadmium Stress

Abbas

Javed

Shahid

et al. 2023

J Plant Growth Regul

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Effects of S-metolachlor on wheat (Triticum aestivum L.) seedling root exudates and the rhizosphere microbiome

Cited by 47 publications

References 57 publications

Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Bensulfuron-Methyl, Terbutylazine, and 2,4-D Butylate Disturb Plant Growth and Resistance by Deteriorating Rhizosphere Environment and Plant Secondary Metabolism in Wheat Seedlings

Antimicrobial Volatiles of the Insect Pathogen Metarhizium brunneum

Deciphering the Impact of Acinetobacter sp. SG-5 Strain on Two Contrasting Zea mays L. Cultivars for Root Exudations and Distinct Physio-Biochemical Attributes Under Cadmium Stress

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