Continuous‐cropping tobacco caused variance of chemical properties and structure of bacterial network in soils

Shu, Chen; Luò, Tāo; Hong-chun, Zhang; Jiang, Qiankun; Wang, Rui; Qi, Gaofu

doi:10.1002/ldr.3167

Cited by 97 publications

(91 citation statements)

References 81 publications

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“…Bacteria as well as plants secrete urease 49 . Continuous cropping causes a decline in the urease activity, and significant correlations between urease activity and bacterial networks have been previously found 50,51 . We found that TN was significantly correlated with microbial communities in all samples (Fig.…”

Section: Discussionmentioning

confidence: 82%

Analysis of bacterial and fungal communities in continuous-cropping ramie (Boehmeria nivea L. Gaud) fields in different areas in China

Wang

Liu

et al. 2020

Sci Rep

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Ramie (Boehmeria nivea L. Gaud) suffers from long-term continuous cropping. Here, using Illumina high-throughput sequencing technology, we aimed to identify bacteria and fungi associated with continuous cropping in ramie fields in Yuanjiang, Xianning, Sichuan, and Jiangxi. The rarefaction results showed that Jiangxi had significantly lower bacterial α-diversity than that of the other areas. Firmicutes, Proteobacteria, and Acidobacteria were the dominant bacterial phyla, and Ascomycota, Basidiomycota, and Zygomycota were the dominant fungal phyla. In Jiangxi, Firmicutes accounted for 79.03% of all valid reads, which could have significant decreased microbial diversity and negative effects of continuous ramie cropping. We used traditional methods to examine soil nutrients. Sichuan had a relatively high pH and available P and K, but low total N; opposite findings were recorded in Jiangxi. The redundancy analysis revealed that the urease activity, PH, available K, and total N significantly correlated with bacterial community abundance, whereas only total N significantly correlated with fungal community abundance (p < 0.01). Overall, the effect of soil environmental factors on the bacterial diversity of continuous ramie cropping was greater than that on fungal diversity. In the future, we will focus on the effect of rhizosphere bacteria to solve the obstacle in continuous ramie cropping. In continuous cropping, the same or a similar species is planted continuously in the same field 1. Generally, long-term continuous cropping decreases crop yield and quality 2-4 , alters soil microbial communities 5,6 , affects soil biochemical properties 7,8 , and enriches soil-borne plant pathogens in soil 9,10. Soil microorganims are not only an important part of soil, but also the main drivers of soil nutrient cycling 11. Soil microorganisms play a crucial role in regulating the fertility of soil, health of plants, and cycling of C, N, and other nutrients 11,12. Previous studies have shown that long-term continuous cropping can alter soil microbial communities 13-15. In a continuous pea-cropping field, the soil microbial community was smaller, and the abundance of beneficial gram-positive bacteria and arbuscular mycorrhizal (AM) fungi was reduced 16. Similarly, Sun et al. found that in continuous cropping of banana, bacterial community diversity continuously decreased and bacterial community composition and structure were affected 8. Numerous studies have revealed that soil attributes are influenced by continuous cropping 17,18. In addition, environmental factors, such as soil pH, affect soil microbial communities 19,20. Wang et al. found that root exudate composition and soil pH affected soil microbial community in different plant growth stages 21. Thus, it is crucial to analyse the relationship between soil microbial community and environmental factors. However, only a few studies have focused on differences in different areas under continuous cropping with the same plant. Ramie, also known as "China grass, " is a perennial plant...

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Section: Discussionmentioning

confidence: 82%

Analysis of bacterial and fungal communities in continuous-cropping ramie (Boehmeria nivea L. Gaud) fields in different areas in China

Wang

Liu

et al. 2020

Sci Rep

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“…The topological roles of nodes in the BWS network are different from those in the HS network. The topological roles of nodes were defined by the within-module connectivity (Z i ) and among-module connectivity (P i ) (23,25,(29)(30)(31)(32) (Fig. 3).…”

Section: Resultsmentioning

confidence: 99%

“…Threshold values of Z i and P i for categorizing nodes are 2.5 and 0.62, respectively. According to the threshold values of Z i and P i proposed by previous research (23,25,(29)(30)(31)(32), the nodes were divided into four categories. (i) Peripheral nodes (named specialists) had low Z i (Ͻ2.5) and low P i (Ͻ0.62) values.…”

Section: Methodsmentioning

confidence: 99%

Microbial Network and Soil Properties Are Changed in Bacterial Wilt-Susceptible Soil

Lin

2019

Appl Environ Microbiol

Self Cite

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Bacterial wilt disease is a devastating disease of crops, which leads to huge economic loss worldwide. It is hypothesized that the occurrence of bacterial wilt may be related to changes in soil chemical properties and microbial interactions. In this study, we compared the soil chemical properties and microbial network structures of a healthy soil (HS) and a bacterial wilt-susceptible soil (BWS). The contents of available nitrogen, potassium, and phosphorus and the soil pH in the BWS were significantly lower than those in the HS. BWS showed nutrient deficiency and acidification in comparison with the HS. The structure and composition of the BWS network were quite different from those of the HS network. The BWS network had fewer modules and edges and lower connectivity than the HS network. The HS network contained more interacting species, more key microorganisms, and better high-order organization and thus was more complex and stable than the BWS network. Most nodes and module memberships were unshared by the two networks, while the ones that were shared showed different topological roles. Some generalists in the HS network became specialists in the BWS network, indicating that the topological roles of microbes were changed and key microorganisms were shifted in the BWS. In summary, the composition and structure of the microbial network of the BWS were different from that of the HS. Many microbial network connections were missing in the BWS, which most likely provided conditions leading to higher rates of bacterial wilt disease. IMPORTANCE Bacterial wilt disease is caused by the pathogen Ralstonia solanacearum and is a widespread devastating soilborne disease leading to huge economic losses worldwide. The soil microbial community is crucial to the capacity of soils to suppress soilborne diseases through complex interactions. Network analysis can effectively explore these complex interactions. In this study, we used a random matrix theory (RMT)-based network approach to investigate the changes in microbial network and associated microbial interactions in a bacterial wilt-susceptible soil (BWS) in comparison to a healthy soil (HS). We found that the structure and composition of the microbial network in BWSs were quite different from those of the HS. The BWS network had fewer modules, edges, and key microorganisms and lower connectivity than the HS network. In the BWSs, apparently the topological role of microbes was changed and key microorganisms were shifted to specialists.

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“…Compared with NPTP (17 modules) and CTP soils (9 modules), OTP network had a more complex structure and a higher number of modules (22 modules) with topological characteristics ( Figure 5). Since highly connected microbial communities within a single module may have unique ecological functions [60], the structure of soil microbial network in organic tea gardens has more diverse ecological function groups, which is of great significance for improving the versatility of soil ecosystem [61]. On the contrary, the common tea garden soil network has the minimum number of topological modules (9 modules), which may lead to the hindrance of the exchange of information, energy and nutrients between microbial communities [60].…”

Section: Discussionmentioning

confidence: 99%

Responses of Microbial Communities and Interaction Networks to Different Management Practices in Tea Plantation Soils

Tan

Shi

et al. 2019

Sustainability

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Soil microorganisms play important roles in the plant health and agricultural production. However, little is known about the complex responses of microbial communities and interaction networks to different agricultural management practices in tea plantation soils. In the present study, Illumina Miseq high-throughput sequencing technology and molecular ecological network (MEN) analysis were used to investigate the soil microbial diversity, community structure and composition, interaction networks of organic tea plantation (OTP), non-polluted tea plantation (NPTP) and conventional tea plantation (CTP). Alpha-diversity indices, Chao1 and richness, of OTP soil were significantly higher than those of NPTP and CTP soils. The beta-diversity analysis showed there were significant differences among bacterial community structures of OTP, NPTP and CTP soils. Composition analysis showed that Proteobacteria, Acidobacteria and Chloroflexi were the most dominant bacteria in all tea plantation soil samples under different management practices, and the beneficial community compositions of OTP soil were significantly different from NPTP and CTP soils at the phylum and genus levels. Canonical correspondence analysis (CCA) and mantel test revealed that TOC and NO3-N contents as well as pH values were the key soil factors to affect the bacterial community structures of tea plantation soils. Furthermore, network analysis showed that the network of OTP soil possessed more functionally interrelated microbial modules than NPTP and CTP soils, indicating that OTP soil possessed the higher ecosystem multi-functionality. These results provided the theoretical basis and reference for improving soil microbial diversity and enhancing community multi-functionality in tea plantation soil ecosystems through effective agricultural management practices.

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Continuous‐cropping tobacco caused variance of chemical properties and structure of bacterial network in soils

Cited by 97 publications

References 81 publications

Analysis of bacterial and fungal communities in continuous-cropping ramie (Boehmeria nivea L. Gaud) fields in different areas in China

Analysis of bacterial and fungal communities in continuous-cropping ramie (Boehmeria nivea L. Gaud) fields in different areas in China

Microbial Network and Soil Properties Are Changed in Bacterial Wilt-Susceptible Soil

Responses of Microbial Communities and Interaction Networks to Different Management Practices in Tea Plantation Soils

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