The application of Bacillus Megaterium alters soil microbial community composition, bioavailability of soil phosphorus and potassium, and cucumber growth in the plastic shed system of North China

Zhao, Yingnan; Mao, Xiaoxi; Zhang, Minshuo; Yang, Wei; Di, Hong J.; Ma, Li; Liu, Wenju; Li, Bowen

doi:10.1016/j.agee.2020.107236

Cited by 57 publications

(23 citation statements)

References 62 publications

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“…Most Actinobacteria and Firmicutes may produce spores that withstand extreme conditions such as heat, dehydration, and radiation [53,54]. Therefore, Actinobacteria and Firmicutes as dominant bacteria are widely distributed in a variety of environmental media, such as atmosphere [55], water [56], soil [57], and plant [58]. The seasonal differences were found in the distribution of bacterial species.…”

Section: Community Compositions Of Microorganismsmentioning

confidence: 99%

Seasonal Variation Characteristics of Bacteria and Fungi in PM2.5 in Typical Basin Cities of Xi’an and Linfen, China

Wang

Liu

et al. 2021

Atmosphere

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Microorganisms existing in airborne fine particulate matter (PM2.5) have key implications in biogeochemical cycling and human health. In this study, PM2.5 samples, collected in the typical basin cities of Xi’an and Linfen, China, were analyzed through high-throughput sequencing to understand microbial seasonal variation characteristics and ecological functions. For bacteria, the highest richness and diversity were identified in autumn. The bacterial phyla were dominated by Proteobacteria, Actinobacteria, Firmicutes, and Bacteroidetes. Metabolism was the most abundant pathway, with the highest relative abundance found in autumn. Pathogenic bacteria (Pseudomonas, Acinetobacter, Serratia, and Delftia) were positively correlated with most disease-related pathways. Besides, C cycling dominated in spring and summer, while N cycling dominated in autumn and winter. The relative abundance of S cycling was highest during winter in Linfen. For fungi, the highest richness was found in summer. Basidiomycota and Ascomycota mainly constituted the fungal phyla. Moreover, temperature (T) and sulfur dioxide (SO2) in Xi’an, and T, SO2, and nitrogen dioxide (NO2) in Linfen were the key factors affecting microbial community structures, which were associated with different pollution characteristics in Xi’an and Linfen. Overall, these results provide an important reference for the research into airborne microbial seasonal variations, along with their ecological functions and health impacts.

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Section: Community Compositions Of Microorganismsmentioning

confidence: 99%

Seasonal Variation Characteristics of Bacteria and Fungi in PM2.5 in Typical Basin Cities of Xi’an and Linfen, China

Wang

Liu

et al. 2021

Atmosphere

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“…According to the soil nutrient grade standard (Table 3), the distribution of total nitrogen, phosphorus, potassium, and organic matter is uniform, and there is no significant regional difference. Soil available phosphorus and potassium are the direct sources of plant phosphorus and potassium nutrition [37,38]. When the content of available phosphorus in soil is more than 20 mg kg −1 , general crops can get sufficient phosphorus supply from soil without applying phosphorus fertilizer [39].…”

Section: Evaluating Effective Factors Of Soil Fertilitymentioning

confidence: 99%

Evaluation of Soil and Irrigation Water Quality in Caohai Lakeside Zone

et al. 2021

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Due to the rapid population growth and over-application of fertilizers in the Caohai surrounding farmlands, controlling the non-point source pollution in the Caohai Lakeside Zone is significant for the local ecology balance and human health safety. A total of 54 soil and 24 irrigation water samples were collected in the Caohai Lakeside Zone to evaluate the current status of soil fertility and heavy metal pollution by measuring soil and water heavy metal content and soil physicochemical properties such as soil total nitrogen, total phosphorus, organic matter, and soil pH. These results showed that the total amounts of organic matter, nitrogen, phosphorus, potassium, and effective nutrient content in the Caohai Lakeside Zone were all at a rich level according to Chinese soil nutrient grade standard; the content of lead (Pb), chromium (Cr), cadmium (Cd), mercury (Hg), and arsenic (As) in the soil all exceeds the safety standard of Chinese classification of soil environmental quality assessment. In addition, the over-standard rates of Cd and Cr were 24.1% and 14.8%, respectively. On the whole, the comprehensive quality index (CQI) of the soil in the Caohai Lakeside Zone is 6.48, which is attributed to the heavy Cd pollution and the good soil fertility. The heavy metal content of the irrigation water met the requirements of irrigation water quality. It is feasible to use the irrigation water of Caohai Lake in the actual agricultural production process. Therefore, in terms of the comprehensive management and pollution control of Caohai, special attention should be paid to the control of Cd, Pb, As, and Hg pollution sources.

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“…Cucumber ( Cucumis sativus L.), a popular and high economic cash crop all over the world, is commonly mono-cultured under plastic shed cultivation (PSC), especially in North China ( Zhao et al, 2021 ; Zhou et al, 2021 ). However, intensively managed PSC soil with long-term continuous cropping has been reported to escalate soil acidification, salinization, nutrient leaching, and accumulation of autotoxic substances ( Xin and Tao, 2020 ; Ni et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…It is of great significance to customize fungal-mediated microbiome structure and identify rhizosphere microbial traits and plant endophytes through high-throughput molecular methods, especially to reveal that which microorganisms are beneficial to plants, which are harmful to plants, and which are opportunistic pathogens ( Du et al, 2020 ). Our knowledge of their wide range of key ecological functions, including saprotrophic, parasitism, symbiosis, and pathogenesis, is still in infancy under PSC ( Han et al, 2019 ; Zhao et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Cover Plants-Mediated Suppression of Fusarium Wilt and Root-Knot Incidence of Cucumber is Associated With the Changes of Rhizosphere Fungal Microbiome Structure-Under Plastic Shed System of North China

et al. 2022

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Cover crops are known to alleviate the adverse effects of continuous cropping by influencing plant health and changing host fungal-microbiome structures. However, insight into the shift of rhizomicrobiota composition and their effects on plant growth performance and resistance mechanism is still limited under plastic shed cultivation (PSC). Four leafy vegetable rotations namely spinach rotation (SR), non-heading Chinese cabbage rotation (NCCR), coriander rotation (CR), and leafy lettuce rotation (LLR) were used as cover crops in 7-years of continuous cucumber planted soil (CC). Their ecological impacts were studied for plant growth performance, replant diseases incidence rate, and rhizosphere fungal microbiome. Compared to CC, SR showed a highly suppressive effect on fusarium wilt, i.e., by 13.2% in the spring season, while NCCR decreased the root-knot nematode incidence rate by 8.9% in the autumn season. Such protective effects caused a significant increase of shoot and fruit biomass and thus sustained the fruit quality of cucumber. High-throughput sequencing revealed that the CR, SR, and NCCR treatments altered the fungal community composition by increasing the abundance of the beneficial fungal genera, decreasing pathogenic taxa, and fostering the saprotrophic and symbiotic functions. However, the relative abundance of most of the potentially pathogenic fungal genera increased in CC and LLR cropping. There were 8 potential pathogens and 10 beneficial or biocontrol fungi characterized. It was found that Paecilomyces, Chaetomium, Cladorrhinum, Zopfiella, Purpureocillium, and Metarhizium were the putative biocontrol microbes that positively affected plant growth and replanted diseases inhibition. The characterized Fusarium, Dactylonectria, Alternaria, Gibberella, and Aspergillus were the key pathogenic fungal agents found to be negatively associated with plant growth characters, suggesting that rhizomicrobiome may play an important role in the occurrence of disease incidence of cucumber plants. Considering the ecological potential of some cover plants, this study suggested that rotation with spinach, non-heading Chinese cabbage, or coriander can enhance rhizosphere immunity by triggering the development of plant-protective fungal microbiomes under plastic shed cucumber cultivation.

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The application of Bacillus Megaterium alters soil microbial community composition, bioavailability of soil phosphorus and potassium, and cucumber growth in the plastic shed system of North China

Cited by 57 publications

References 62 publications

Seasonal Variation Characteristics of Bacteria and Fungi in PM2.5 in Typical Basin Cities of Xi’an and Linfen, China

Seasonal Variation Characteristics of Bacteria and Fungi in PM2.5 in Typical Basin Cities of Xi’an and Linfen, China

Evaluation of Soil and Irrigation Water Quality in Caohai Lakeside Zone

Cover Plants-Mediated Suppression of Fusarium Wilt and Root-Knot Incidence of Cucumber is Associated With the Changes of Rhizosphere Fungal Microbiome Structure-Under Plastic Shed System of North China

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