Effects of nitrogen and phosphorus imbalance input on rhizosphere and bulk soil bacterial community of Suaeda salsa in the Yellow River Delta

Zhang, Zehao; Sun, Jingkuan; Li, Tian; Shao, Ping; Ma, Jianchao; Dong, Kaikai

doi:10.3389/fmars.2023.1131713

Cited by 4 publications

(2 citation statements)

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“…In a study of coastal wetland, N addition was found to decrease the diversity of the P. communis rhizosphere soil bacterial community (Lu, Xie, et al, 2021). However, it has also been found that N addition increased bacterial community diversity in S. salsa (Zhang et al, 2023). The reason for this difference may be due to the salt metabolism mechanism of halophytes.…”

Section: Discussionmentioning

confidence: 98%

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Zhang

Shao

et al. 2023

Land Degrad Dev

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The total amount and rate of atmospheric nitrogen (N) deposition are constantly increasing, which substantially influences the soil microbial community structure and function. However, it is still unclear whether the responses of different plant rhizosphere soil bacterial community to short‐term N addition was consistent. Based on 16s rRNA sequencing, we investigated the responses of rhizosphere and bulk soil bacterial community of halophytes (salt‐absorbing, salt‐rejecting, and salt‐secreting plant) to short‐term N addition in the Yellow River Delta. The bacterial community α‐diversity of Suaeda salsa (salt‐absorbing plant) was significantly higher in rhizosphere soil than in bulk soil, while no significant difference between Phragmites communis (salt‐rejecting plant) rhizosphere and bulk soil bacterial community α‐diversity was found. The differences were mainly ascribed to the higher N uptake capacity of P. communis, which resulted in no difference in N content between rhizosphere and bulk soil. The short‐term N addition significantly increased the α‐diversity of bacterial community in the rhizosphere soil of Aeluropus sinensis (salt‐secreting plant), but there was no effect on the α‐diversity of bacterial community in the rhizosphere soil of P. communis. Nitrogen addition enhances the salt uptake capacity of A. sinensis and alleviates the salt stress of bacterial growth. The relative abundance of Bacteroidetes for S. salsa and A. sinensis was significantly higher in rhizosphere soil than in bulk soil, and the relative abundance of Actinobacteria for P. communis and S. salsa was higher and lower in rhizosphere soil than in bulk soil, respectively. Salt‐absorbing of S. salsa leads to elevated rhizosphere soil salinity. Higher salinity and abundant carbon promote the Bacteroidetes and inhibit the Actinobacteria. Short‐term N addition caused an increase in the relative abundance of Gemmatimonadetes in halophyte rhizosphere soil and a decrease in the relative abundance of Firmicutes in S. salsa and A. sinensis bulk soil, which may be due to the different response of C:N of root secretions to N addition in halophytes. The relative abundance of rhizosphere soil denitrifying bacteria was higher in S. salsa and A. sinensis than in P. communis, while the reverse was observed for N‐fixing bacteria. The relative abundance of denitrifying bacteria decreased in P. communis and increased in S. salsa and A. sinensis. The low N soil environment of P. communis promotes the activity of N‐fixing bacteria, and the abundant N content of S. salsa and A. sinensis soil promotes the denitrification process. The research clarified that the response of soil bacterial community to short‐term N addition Treatment differed due to the influence of plant species and that N additions had smaller effects on the bacterial community than plant species.

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Section: Discussionmentioning

confidence: 98%

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Zhang

Shao

et al. 2023

Land Degrad Dev

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“…In this study, the higher abundance of Proteobacteria in the no P treatment may be ascribed to the increase of P-solubilizing and -mineralizing microorganisms, most of which belong to the phylum Proteobacteria ( Wei et al., 2019 ). With respect to Bacteroidota, the increased relative abundance may relate to the increased exudates of rhizosphere soils, especially at the high P level, as these bacteria are reported to be important carbohydrate degraders by secreting diverse sets of carbohydrate-active enzymes ( Kruczynska et al., 2023 ; Zhang et al., 2023b ). Moreover, other bacterial phyla may also respond to P input, as in other research, the addition of P significantly increased only two phyla, Armatimonadetes and Chlorobi ( Ling et al., 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Response of bacterial community structure to different phosphorus additions in a tobacco-growing soil

Zhou,

Cheng,

Peng

et al. 2024

Front. Plant Sci.

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IntroductionPhosphorus (P), which plays a vital role in plant growth, is continually added to soil to maximize biomass production, leading to excessive P accumulation and water eutrophication.ResultsIn this study, a pot experiment using a subtropical tobacco-growing soil fertilized with four P levels—no P, low P, medium P, and high P—was conducted and rhizosphere and bulk soils were analyzed.ResultsP addition significantly increased tobacco biomass production (except under low P input) and total soil P and available P content (P<0.05), whereas total nitrogen content decreased in the rhizosphere soils, although this was only significant with medium P application. P fertilization also significantly altered the bacterial communities of rhizosphere soils (P<0.05), but those of bulk soils were unchanged (P>0.05). Moreover, a significant difference was found between rhizosphere soils with low (LR) and high (HR) P inputs (P<0.05). Additionally, compared with rhizosphere soils with no P (CKR), Shannon diversity showed a declining trend, which was significant with LR and HR (P<0.05), whereas an increasing tendency was observed for Chao1 diversity except in LR (P>0.05). Functional prediction revealed that P application significantly decreased the total P and N metabolism of microorganisms in rhizosphere soils (P<0.05).DiscussionCollectively, our results indicate that maintaining sustainable agricultural ecosystems under surplus P conditions requires more attention to be directed toward motivating the potential of soil functional microbes in P cycling, rather than just through continual P input.

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Phycospheric bacteria limits the effect of nitrogen and phosphorus imbalance on diatom bloom

Zheng,

Hu,

Liu

et al. 2024

Science of The Total Environment

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Effects of nitrogen and phosphorus imbalance input on rhizosphere and bulk soil bacterial community of Suaeda salsa in the Yellow River Delta

Cited by 4 publications

References 57 publications

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Effects of short‐term nitrogen addition on rhizosphere and bulk soil bacterial community structure of three halophytes in the Yellow River Delta

Response of bacterial community structure to different phosphorus additions in a tobacco-growing soil

Phycospheric bacteria limits the effect of nitrogen and phosphorus imbalance on diatom bloom

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