Impact of nitrogen addition on plant-soil-enzyme C–N–P stoichiometry and microbial nutrient limitation

Xu, Hongwei; Qu, Qing; Li, Guanwen; Liu, Guobin; Geissen, Violette; Ritsema, C.J.; Xue, Sha

doi:10.1016/j.soilbio.2022.108714

Cited by 96 publications

(35 citation statements)

References 48 publications

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“…Previous studies showed that soil EcM fungi and SAP could secret PEX to degrade recalcitrant organic matter which could not be absorbed by plants and promote soil net R a ( Bödeker et al., 2014 ; Corrales et al., 2016 ; Ward et al., 2021 ). However, our results showed that ErM fungi were negatively correlated with soil PEX activity ( Figure 6A ) which might be due to microbial C limitation when soil C: N was low ( Midgley and Phillips, 2014 ; Xu et al., 2022 ). As such, ErM fungi would reduce the energy available for synthase soil PEX ( Carrara et al., 2018 ).…”

Section: Discussionmentioning

confidence: 74%

The effects of ectomycorrhizal and saprotropic fungi on soil nitrogen mineralization differ from those of arbuscular and ericoid mycorrhizal fungi on the eastern Qinghai-Tibetan Plateau

et al. 2023

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Interactions between soil fungi and soil environmental factors regulate soil nitrogen (N) mineralization rates on the eastern Qinghai-Tibetan Plateau. Some studies have also illuminated differences in soil N mineralization rate based on different mycorrhizal forests, but the associated effect of soil fungal functional guilds and soil environmental factors underlying this process are not well-understood. Three primary forests respectively dominated by Abies fargesii var. faxoniana (ectomycorrhizal, EcM), Cupressus chengiana (arbuscular mycorrhizal, AM) and Rhododendron phaeochrysum (ericoid mycorrhizal, ErM) trees were selected in this area. Meanwhile, soil net N mineralization rate, soil fungal composition and soil enzyme activity among these three mycorrhizal forests were studied. Our results showed that there were significant differences in the seasonal variation of soil net N mineralization rates among three mycorrhizal forests. Soil net N mineralization rate in the AM forest was faster. EcM fungi and saprotroph are the main functional guilds in these three mycorrhizal forests. Meanwhile, the relative abundances of soil fungal functional guilds, soil temperature and soil peroxidase activity could explain 85.0% in the difference of soil net ammonification rate among three mycorrhizal forests. In addition, soil temperature, soil water-filled pore space and soil ammonium content play a central role in controlling the differing soil net nitrification rate among three mycorrhizal forests. Our results suggest differences in soil net mineralization among different mycorrhizal forest types are driven mainly by soil net ammonification. Soil fungal functional guilds and temperature regulate the rate of soil net ammonification by modulating soil peroxidase activity.

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Section: Discussionmentioning

confidence: 74%

The effects of ectomycorrhizal and saprotropic fungi on soil nitrogen mineralization differ from those of arbuscular and ericoid mycorrhizal fungi on the eastern Qinghai-Tibetan Plateau

et al. 2023

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“…However, when drought was induced, the Norungan had a higher response in respiration rates than Co51, indicating that the drought-responsive rhizosphere functioning is higher for landraces than cultivars. Soil enzymes, viz., dehydrogenase, urease, and phosphatase, are sensitive indicators of soil health, and the rhizosphere always accounted for higher activities than bulk soils (Xu et al 2022). In the present investigation, the landrace Norungan rhizosphere accounted for signi cantly higher enzyme activities than Co51, and drought had a signi cantly deleterious impact on these enzymes for Co51 but less for Norungan.…”

Section: Discussionmentioning

confidence: 99%

Rhizosphere functioning and rhizo-microbiome of two contrasting genotypes of rice under drought-induced conditions

Nunna¹,

Balachandar

2022

Preprint

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Background and aim Rhizosphere function is the key determinant of crop growth and fitness under moisture-stress conditions. Human-centered breeding adversely affects microbiome recruitment of crops. Hence, during drought, wild types and landraces adapt to stress, while modern cultivars and hybrids fail to do so and are susceptible to drought. Understanding the rhizosphere difference between landraces and cultivars will help to improve microbiome-mediated drought mitigation. Methods We compared rhizospheres of rice landrace, Norungan, and high-yielding cultivar, Co51, grown under normal moisture and drought-induced conditions using soil biochemical and 16S rRNA gene sequencing approach. Results Soil carbon pools, enzymes, and respiration were adversely affected due to drought in both genotypes' rhizospheres. However, Norungan rhizosphere accounted for less harm to the soil attributes than Co51. Reduction in soil organic carbon (3.94%), microbial biomass carbon (14.26%), labile carbon (1.94%), dehydrogenase (10.1%), urease (21.27%), phosphatase (9.61%), and respiration rate (15.02%) was accounted in Co51 than Norungan, during drought. Alpha diversity of bacterial communities in rice's rhizosphere was significantly lower than in bulk soil, and drought further reduced the diversity in both genotypes. Moisture-stress reduced the abundance of Firmicutes (180%) and Bacteroidetes (57%) in Norungan's rhizosphere, while, Acidobacteria (51%), Actinobacteria (54%), Chlolorflexi (41%), and Proteobacteria (34%) got increased. On the other hand, Co51 rhizosphere acquired an enhanced abundance of Firmicutes (79%) and Bacteriodetes (170%) and lessened abundance of Acidobacteria (15%) and Proteobacteria (31%) due to drought. Conclusion These results suggest that landrace Norungan under moisture-stress conditions recruits less-diversified, specific groups of microorganisms to augment rhizosphere functioning.

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“…Soil microorganisms are the main components of terrestrial ecosystems, which plays a key role in the decomposition of organic matter, nutrient cycling and the degradation of harmful substances, and also play an important role in facility planting agricultural ecosystems ( Zhu et al., 2019 ; Ma et al., 2023 ). Soil bacteria are the main component of soil microorganisms ( Wang et al., 2017 ), which have high diversity, high abundance and complete functions ( Li and Ma, 2018 ; Xu et al., 2022 ; Zhu et al., 2022 ). Soil bacteria are mainly involved in the formation of humus and the mineralization of organic matter, which is essential for regulating soil enzyme activity, soil nutrient cycle and crop root morphological development ( Özbolat et al., 2023 ; Zheng et al., 2023 ).…”

Section: Introductionmentioning

confidence: 99%

The layout measures of micro-sprinkler irrigation under plastic film regulate tomato soil bacterial community and root system

Zhang

Xiao²,

Li³

et al. 2023

Front. Plant Sci.

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IntroductionThe change in rhizosphere soil bacterial community and root system under new water-saving device is not clear.MethodsA completely randomized experimental design was used to explore the effects of different micropore group spacing (L1: 30 cm micropore group spacing, L2: 50 cm micropore group spacing) and capillary arrangement density (C1: one pipe for one row, C2: one pipe for two rows, C3: one pipe for three rows) on tomato rhizosphere soil bacteria community, roots and tomato yield under MSPF. The bacteria in tomato rhizosphere soil were sequenced by 16S rRNA gene amplicon metagenomic sequencing technology, the interaction of bacterial community, root system and yield in tomato rhizosphere soil was quantitatively described based on regression analysis.ResultsResults showed that L1 was not only beneficial to the development of tomato root morphology, but also promoted the ACE index of tomato soil bacterial community structure and the abundance of nitrogen and phosphorus metabolism functional genes. The yield and crop water use efficiency (WUE) of spring tomato and autumn tomato in L1 were about 14.15% and 11.27%, 12.64% and 10.35% higher than those in L2. With the decrease of capillary arrangement density, the diversity of bacterial community structure in tomato rhizosphere soil decreased, and the abundance of nitrogen and phosphorus metabolism functional genes of soil bacteria also decreased. The small abundance of soil bacterial functional genes limited the absorption of soil nutrients by tomato roots and roots morphological development. The yield and crop water use efficiency of spring and autumn tomato in C2 were significantly higher than those in C3 about 34.76% and 15.23%, 31.94% and 13.91%, respectively. The positive interaction between soil bacterial community and root morphological development of tomato was promoted by the capillary layout measures of MSPF.DiscussionThe L1C2 treatment had a stable bacterial community structure and good root morphological development, which positively promoted the increase of tomato yield. The interaction between soil microorganisms and roots of tomato was regulated by optimizing the layout measures of MSPF to provide data support for water-saving and yield-increasing of tomato in Northwest China.

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Impact of nitrogen addition on plant-soil-enzyme C–N–P stoichiometry and microbial nutrient limitation

Cited by 96 publications

References 48 publications

The effects of ectomycorrhizal and saprotropic fungi on soil nitrogen mineralization differ from those of arbuscular and ericoid mycorrhizal fungi on the eastern Qinghai-Tibetan Plateau

The effects of ectomycorrhizal and saprotropic fungi on soil nitrogen mineralization differ from those of arbuscular and ericoid mycorrhizal fungi on the eastern Qinghai-Tibetan Plateau

Rhizosphere functioning and rhizo-microbiome of two contrasting genotypes of rice under drought-induced conditions

The layout measures of micro-sprinkler irrigation under plastic film regulate tomato soil bacterial community and root system

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