The importance of rare versus abundant phoD-harboring subcommunities in driving soil alkaline phosphatase activity and available P content in Chinese steppe ecosystems

Lin, Xu; Cao, Huili; Li, Chaonan; Wang, Changhui; He, Nianpeng; Hu, Shuya; Yao, Minjie; Wang, Changting; Wang, Junming; Zhou, Shungui; Li, Xiangzhen

doi:10.1016/j.soilbio.2021.108491

Cited by 51 publications

(15 citation statements)

References 56 publications

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“…More importantly, the microbial biomass C/P decreased from 190.8 (1-yr) to 56.23 (35-yr), which indicated that the supply of P changes the nutritional-limiting factors of microbial growth, resulting in the imbalance of microbial biomass stoichiometric ratio. Xu et al (2022) reported that MBC/MBP was the main factor affecting the richness of the microbial community and that it was significantly related to phoD gene abundance and S-ALP activity, which indicated that the changes of nutrient elements in soil could meet the P demand by microorganisms regulating the mineralization of Po. The adjustment of microbial biomass stoichiometric ratio was related to the physiological regulation mechanism of microorganisms.…”

Section: Discussionmentioning

confidence: 99%

“…Xu et al. (2022) reported that MBC/MBP was the main factor affecting the richness of the microbial community and that it was significantly related to phoD gene abundance and S‐ALP activity, which indicated that the changes of nutrient elements in soil could meet the P demand by microorganisms regulating the mineralization of Po. The adjustment of microbial biomass stoichiometric ratio was related to the physiological regulation mechanism of microorganisms.…”

Section: Discussionmentioning

confidence: 99%

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Long‐term rice cultivation promoted microbial mineralization of organic P in a black soil

Tong

et al. 2022

Soil Science Soc of Amer J

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Information on the microbiological process in paddy soil is essential to understand phosphorus (P) transformation, due to the special biogeochemical change of P in flooded rice (Oryza sativa L.)‐growing environment. However, relatively few references have been focused on this process in long‐term cultivation of black paddy soil. In this study, we investigated the effect of microbial community and phoD gene on changes in soil P fractions in a black paddy soil. The results showed that, compared with 1‐yr soil, long‐term cultivation (35‐yr rice growth) significantly increased the concentration of soil P pool (P < .05). In detail, the soil available‐P increased from 15.4 to 34.8 mg kg−1, and primary‐P, secondary‐P, occluded‐P and organic‐P increased from 41.4 to 73.6 mg kg−1, 7.60 to 18.9 mg kg−1, 57.6 to 106.1 mg kg−1, and 13.7 to 29.1 mg kg−1, respectively. Notably, the microbial biomass C/P ratio decreased from 190.8 (1‐yr) to 56.2 (35‐yr), indicating that the mineralization of organic P (Po) by microorganisms played a dominant role in long‐term cultivation. The results were further verified by significantly increased soil microorganism concentration, copy number of phoD gene, and strong interaction in phoD‐harboring bacteria. The change of soil P pool was significantly affected by soil properties and phoD gene community through variance partitioning analysis, and Streptomyces and Cupriavidus were the main biomarkers affecting Po mineralization through linear discriminant analysis effect size (LEfSe) analysis. The results will be helpful to understand the microbial process of P transformation (especially for Po) and to guide the management of P fertilizer in black soil area.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Long‐term rice cultivation promoted microbial mineralization of organic P in a black soil

Tong

et al. 2022

Soil Science Soc of Amer J

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“…Further studies need to clarify how rhizosphere microbial composition governs tradeoffs among root morphology, exudation, and mycorrhizal symbioses for phosphorus-acquisition strategies. The key microbial taxa or microbe-derived phytohormones are important in influencing root morphological and exudation traits related to crop nutrient acquisition ( Huang et al, 2021 ; Sun et al, 2021 ; Mamet et al, 2022 ; Xu et al, 2022 ). It is necessary to clarify the mechanisms of dynamic root-microbe interactions underlying rhizosphere microbial composition or phytohormones in soils treated with organic material and P fertilization.…”

Section: Discussionmentioning

confidence: 99%

Carbon–Phosphorus Coupling Governs Microbial Effects on Nutrient Acquisition Strategies by Four Crops

Zhang

et al. 2022

Front. Plant Sci.

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Plants adjust root morphological and/or exudation traits in response to phosphorus (P) mobilization mediated by microorganisms. We hypothesized that straw application coupled with P fertilization would influence microbial P and then root nutrient-acquisition strategies related to crop growth. Root morphological (length and average diameter) and exudation traits (acid phosphatase and carboxylates) of Brassica chinensis, Solanum lycopersicum, Lactuca sativa, and Vigna unguiculata in response to microbial P dynamics were characterized in no-P and P-fertilized soil with/without straw addition. Straw addition increased the growth of fungi and bacteria, stimulating microbial P immobilization at day 24. The high microbial abundance was associated with four tested crops having short roots in straw-amended compared with no-straw soil at day 24. In straw-amended soil, B. chinensis and S. lycopersicum shifted toward root P-acquisition strategies based on fast elongation and strong carboxylate exudation from days 24 to 40. Such effective root P-acquisition strategies together with microbial P release increased shoot P content in S. lycopersicum in straw-amended compared with those without straw at day 40. Conversely, L. sativa and V. unguiculata produced short roots in response to the stable (or even increased) microbial P after straw addition till day 40. In straw-amended soil, high P application stimulated root elongation and carboxylate exudation in L. sativa and V. unguiculata, whereas carboxylate exudation by S. lycopersicum was decreased compared with the straw-amended but non-fertilized treatment at day 40. In summary, root P-acquisition strategies in response to microbial P differed among the tested crop species. Phosphorus fertilization needs to be highlighted when returning straw to enhance P-use efficiency in vegetable cropping systems.

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“…A structural equation model (SEM) was established using the AMOS software (IBM SPSSS 26.0.0; Malaeb et al, 2000 ) to illustrate the relationship among soil properties, phoD -harboring bacterial diversity and richness, and ALP activity under the different P fertilizer. The Chao1 index was used to describe the microbial community richness, and the Shannon index was used to represent the microbial community diversity ( Wang et al, 2022 ; Xu et al, 2022 ). Model accuracy was tested with goodness-of-fit index (CFI) ( p > 0.05) and Akaike information criterion (AIC; Markland, 2007 ).…”

Section: Methodsmentioning

confidence: 99%

Changes in soil properties and the phoD-harboring bacteria of the alfalfa field in response to phosphite treatment

Wang

et al. 2022

Front. Microbiol.

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Phosphite, a reduced form of orthophosphate, is characterized by high solubility, and transportation efficiency and can be used as potential phosphorus fertilizer, plant biostimulant and supplemental fertilizer in agriculture. However, the effects of phosphite fertilizer on soil properties and microorganisms are poorly understood. This study evaluated the effects of phosphate and phosphite fertilizers on the different forms of phosphorus, alkaline phosphatase (ALP) activity, and phoD-harboring bacterial community in the alfalfa (Medicago sativa) field. The study used four concentrations (30, 60, 90, and 120 mg P2O5 kg−1 soil) of phosphate (KH2PO4) and phosphite (KH2PO3) fertilizers for the alfalfa field treatment. The results showed that both phosphite and phosphate fertilizers increased the total phosphorus (TP) and available phosphorus (AP) contents in the soil. The phosphorus content of the phosphite-treated soil was lower than that of the phosphate-treated one. TP, inorganic phosphate (Pi), and AP negatively regulated ALP activity, which decreased with increasing phosphate and phosphite fertilizers concentrations. Furthermore, high-throughput sequencing analysis identified 6 phyla and 29 families, which were classified from the altered operational taxonomic units (OTUs) of the soil samples. The redundancy analysis (RDA) revealed that pH, TP, AP and Pi were significantly related to the phoD-harboring bacterial community constructure. The different fertilizer treatments altered the key families, contributing to soil ALP activities. Frankiaceae, Sphingomonadaceae, and Rhizobiaceae positively correlated with ALP activity in phosphite-treated soil. Moreover, the structural equation model (SEM) revealed that ALP activity was affected by the phoD-harboring bacterial community through altered organic phosphorus (Po), AP, total nitrogen (TN), soil organic carbon (SOC), and pH levels under phosphate fertilizer treatment. However, the effect was achieved through positive regulation of pH and AP under phosphite fertilizer. Thus, the changes in soil properties and phoD-harboring bacteria in response to phosphate and phosphite treatments differed in the alfalfa field. This study is the first to report the effects of phosphite on the soil properties of an alfalfa field and provides a strong basis for phosphite utilization in the future.Highlights– Phosphite and phosphate increase the total phosphorus and available phosphorus.– The pH was the dominant factor influencing the phoD-harboring bacterial community under phosphite fertilizer.– The response of soil properties and phoD-harboring bacterial community to phosphate and phosphite fertilizers differed in the alfalfa field.

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The importance of rare versus abundant phoD-harboring subcommunities in driving soil alkaline phosphatase activity and available P content in Chinese steppe ecosystems

Cited by 51 publications

References 56 publications

Long‐term rice cultivation promoted microbial mineralization of organic P in a black soil

Long‐term rice cultivation promoted microbial mineralization of organic P in a black soil

Carbon–Phosphorus Coupling Governs Microbial Effects on Nutrient Acquisition Strategies by Four Crops

Changes in soil properties and the phoD-harboring bacteria of the alfalfa field in response to phosphite treatment

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