Effects of fumigation with metam-sodium on soil microbial biomass, respiration, nitrogen transformation, bacterial community diversity and genes encoding key enzymes involved in nitrogen cycling

Li, Jun; Huang, Bin; Wang, Qiuxia; Li, Yuan; Fang, Wensheng; Han, Dingding; Yan, Dongdong; Guo, Ming; Cao, Aocheng

doi:10.1016/j.scitotenv.2017.02.058

Cited by 68 publications

(45 citation statements)

References 43 publications

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“…Microbial nitrogen-fixation is a primary source of new nitrogen for terrestrial ecosystems, but many environmental parameters and farm operations such as fertilization and fumigation can moderate this biological process ( Reed et al, 2010 ; Zheng et al, 2016 ). Previous research reported that fungicides (such as myclobutanil) and fumigants (such as metam sodium) can briefly inhibit the expression of the nitrogen-fixing functional gene nifH ( Ju et al, 2016 ; Li et al, 2017a ). We observed, however, that the abundance of nifH was increased in fumigated Beijing soil, suggesting that DZ can increase populations of nitrogen-fixing bacteria that contain nifH -encoding enzymes.…”

Section: Discussionmentioning

confidence: 99%

“…Microorganisms, and in particular bacteria, are reported to significantly influence the soil quality and crop yield by regulating several important soil processes, such as organic matter decomposition, organic pollutant degradation and nutrient transformation ( Álvarez-Martín et al, 2016 ; Crouzet et al, 2016 ). Previous studies reported that the fumigants chloropicrin (CP), 1,3-dichloropropene and metam sodium (MS) significantly decreased soil bacterial diversity and significantly changed the predominance of bacterial phyla in microbial communities ( Liu et al, 2015 ; Li et al, 2017a , b ; Zhang et al, 2017 ). Recent studies also showed that CP and MS caused significant changes in the population size and community composition of bacteria involved in N-cycling ( Li et al, 2017a , b ).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies reported that the fumigants chloropicrin (CP), 1,3-dichloropropene and metam sodium (MS) significantly decreased soil bacterial diversity and significantly changed the predominance of bacterial phyla in microbial communities ( Liu et al, 2015 ; Li et al, 2017a , b ; Zhang et al, 2017 ). Recent studies also showed that CP and MS caused significant changes in the population size and community composition of bacteria involved in N-cycling ( Li et al, 2017a , b ). These changes significantly affected nitrogen transforming activities, including nitrogen mineralization ( Shen et al, 1984 ) and nitrogen reduction ( Yan et al, 2013 , 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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Responses of Nitrogen-Cycling Microorganisms to Dazomet Fumigation

et al. 2018

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The influence of soil fumigation on microorganisms involved in transforming nitrogen remains little understood, despite the use of fumigants for many decades to control soil-borne pathogens and plant-parasitic nematodes. We used real-time PCR (quantitative polymerase chain reaction) and 16S rRNA gene amplicon sequencing techniques to monitor changes in the diversity and community structure of microorganisms associated with nitrogen transfer after the soil was fumigated with dazomet (DZ). We also examined nitrous oxide (N2O) emissions from these microorganisms present in fumigated fluvo-aquic soil and lateritic red soil. Fumigation with DZ significantly reduced the abundance of 16S rRNA and nitrogen cycling functional genes (nifH, AOA amoA, AOB amoA, nxrB, narG, napA, nirK, nirS, cnorB, qnorB, and nosZ). At the same time, N2O production rates increased between 9.9 and 30 times after fumigation. N2O emissions were significantly correlated with NH4+, dissolved amino acids and microbial biomass nitrogen, but uncorrelated with functional gene abundance. Diversity indices showed that DZ temporarily stimulated bacterial diversity as well as caused a significant change in bacterial community composition. For example, DZ significantly decreased populations of N2-fixing bacteria Mesorhizobium and Paenibacillus, nitrifiers Nitrosomonas, and the denitrifiers Bacillus, Pseudomonas, and Paracoccus. The soil microbial community had the ability to recover to similar population levels recorded in unfumigated soils when the inhibitory effects of DZ fumigation were no longer evident. The microbial recovery rate, however, depended on the physicochemical properties of the soil. These results provided useful information for environmental safety assessments of DZ in China, for improving our understanding of the N-cycling pathways in fumigated soils, and for determining the potential responses of different N-cycling groups after fumigation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Responses of Nitrogen-Cycling Microorganisms to Dazomet Fumigation

et al. 2018

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“…For instance: chloropicrin inhibited conversion of ammonia to nitrite in five different soil types [147], and chloropicrin and dazomet treatments lowered microbial activities and soil microbiome biomass, decreased alkaline phosphatase harboring microbes, and also resulted in different microbiomes as compared to those of anaerobic soil disinfestation (ASD) treatments [137,148]. However, a study with metam-sodium showed a mixed effect, where it inhibited substrate-induced respiration, microbial biomass nitrogen, and accumulated ammonium ions in the soil in short term, but reduced the population of bacteria and fungi in the soil and shifted soil bacterial population to plant growth-promoting bacteria and biodegrading bacteria [149]. The negative impact of these chemical fumigants on the soil physicochemical properties and microbiome has provided an impetus to advance the science of non-chemical alternatives to manage V. dahliae.…”

Section: Chemicals In Use For Verticillium Wilt Managementmentioning

confidence: 99%

Opportunities and Challenges in Studies of Host-Pathogen Interactions and Management of Verticillium dahliae in Tomatoes

Acharya

Ingram

et al. 2020

Plants

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Tomatoes (Solanum lycopersicum L.) are a valuable horticultural crop that are grown and consumed worldwide. Optimal production is hindered by several factors, among which Verticillium dahliae, the cause of Verticillium wilt, is considered a major biological constraint in temperate production regions. V. dahliae is difficult to mitigate because it is a vascular pathogen, has a broad host range and worldwide distribution, and can persist in soil for years. Understanding pathogen virulence and genetic diversity, host resistance, and plant-pathogen interactions could ultimately inform the development of integrated strategies to manage the disease. In recent years, considerable research has focused on providing new insights into these processes, as well as the development and integration of environment-friendly management approaches. Here, we discuss the current knowledge on the race and population structure of V. dahliae, including pathogenicity factors, host genes, proteins, enzymes involved in defense, and the emergent management strategies and future research directions for managing Verticillium wilt in tomatoes.

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“…AOA supports nitrification in different habitats, separate studies of AOB and AOA functions in ammonia oxidation have attracted significant attention and many researchers [15]. The ammonia-oxidation cycle in environmental studies is distinctive compared to microbiological studies [16]. The microbial communities are active in nitrogen fixation and strongly participate in the process of turnover of river cycling substances.…”

Section: Introductionmentioning

confidence: 99%

Functional Characterization and Diversity of Ammonia-Oxidizing Microorganisms in Streams South of the Dabie Mountains, China

Ginawi¹,

Lixiao²,

Wang³

et al. 2018

Preprint

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Ammonia-oxidizing microorganism communities are abundant and functionally efficacious in nitrification. However, ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) groups complicate this process in subtropical streams. This study investigates the abundance of ammonia-oxidizing communities south of the Dabie Mountains, China, using quantitative polymerase chain reaction (qPCR). Clone libraries were utilized to analyze the abundance and microbial structures of AOA and AOB in sediments. Such analysis may provide strong evidence reflecting the links within the environment. The results show that AOB had a lower abundance of copies of the ammonia-oxidizing gene (amoA) than AOA. Interestingly, the AOA and AOB community compositions were correlated with ecological characteristics. The dissolved oxygen (DO) and oxidation-reduction potential (ORP) had significant positive correlations, whereas the phosphorus within the structure had a negative correlation with the abundance of both groups. Our study shows that it might adopt some species related to Nitrosotalea clusters that can resist comparably higher pH (toward pH 6.5). Together, these results imply that the physiological adaptation of microbial guilds to environmental pressures in ammonia-oxidizing archaea might allow them to have a more substantial function of ammonia-oxidizing communities in natural habitats.

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Effects of fumigation with metam-sodium on soil microbial biomass, respiration, nitrogen transformation, bacterial community diversity and genes encoding key enzymes involved in nitrogen cycling

Cited by 68 publications

References 43 publications

Responses of Nitrogen-Cycling Microorganisms to Dazomet Fumigation

Responses of Nitrogen-Cycling Microorganisms to Dazomet Fumigation

Opportunities and Challenges in Studies of Host-Pathogen Interactions and Management of Verticillium dahliae in Tomatoes

Functional Characterization and Diversity of Ammonia-Oxidizing Microorganisms in Streams South of the Dabie Mountains, China

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