Assessing the effect of soil salinization on soil microbial respiration and diversities under incubation conditions

Yang, Chao; Wang, Xinzhen; Miao, Fuhong; Li, Zhenyi; Tang, Wei; Sun, Juan

doi:10.1016/j.apsoil.2020.103671

Cited by 87 publications

(64 citation statements)

References 35 publications

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“…Generally, the soil pH, salt content, and EC exhibit collinearity in saline-alkali soils ( Zhao et al, 2018 ). Here, the soil salt content and EC significantly increased as the salinization level increased, which is in line with our previous study ( Yang et al, 2020 ); however, soil pH showed no significant increase in the salinization level increased in this study, indicating the correlation between soil pH and salt is limited by the range of salt value, especially in the extremely saline soils of the YRD, China ( Hu et al, 2016 ; Zhao et al, 2020 ). The negative relationship between soil TC and the salt content in the present study is consistent with the results reported by Morrissey et al (2014) and is mainly due to the poor growth of plants affected by salinity, resulting in a low amount of organic carbon in the soil ( Wong et al, 2010 ).…”

Section: Discussionsupporting

confidence: 92%

“…community structure because the difference in their tolerance to salinity. Our previous study found that Shannon diversity values in saline-alkali soils from grassland were significantly lower than those in low salinity soils (Yang et al, 2020), which was also confirmed in the present study. There was a weakly significant correlation between Shannon diversity and the soil salt content, and the similar salt content in low and medium salinity soils may not have been sufficient to cause detectable Shannon diversity in the present study.…”

Section: Salinity Effect On Soil Properties Fungal Communities and supporting

confidence: 92%

“…Additionally, Geml et al (2014) observed that soil fungal communities were closely related to the soil carbon (C) and nitrogen (N) contents. In saline-alkali soils of temperate grassland in northern China, our findings suggest that soil pH was negatively correlated with fungal diversity compared with soil salinity and the C/N ratio (soil carbon to nitrogen ratio; Yang et al, 2020). As soil salinization and alkalization frequently co-occur, it is necessary to identify which factor has the greater influence on the composition and diversity of soil fungi in the severe salinization region of the YRD.…”

Section: Introductionmentioning

confidence: 89%

“…Soil bulk density (BD) was calculated using the ring knife method at a 0–15 cm depth. In brief, a foil sampler with a volume of 100 cm −3 was used to obtain the samples, which were then dried at 105°C for 24 h. The soil salt content was determined in a mixture with a soil: water ratio of 1:5, and the soil extract was then dried at 105°C for 24 h ( Yang et al, 2020 ).…”

Section: Methodsmentioning

confidence: 99%

“…Numerous studies have shown that fungal communities are influenced by soil salinity (Mohamed and Martiny, 2011;Krishnamoorthy et al, 2014). High soil salinity increased the relative abundance of the fungal phylum Ascomycota (Kim et al, 2019;Yang et al, 2020).…”

Section: Salinity Effect On Soil Properties Fungal Communities and mentioning

confidence: 99%

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Soil Salinity Drives the Distribution Patterns and Ecological Functions of Fungi in Saline-Alkali Land in the Yellow River Delta, China

Yang

Sun

2020

Front. Microbiol.

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High soil salinity is the main factor that limits soil microbial activity in the Yellow River Delta (YRD); however, its effects on fungal community and ecological function are unknown. Here, we comparatively investigated the diversity and structures of soil fungal communities targeting the internally transcribed fungal spacer gene using Illumina MiSeq sequencing methods under a salt gradient with five levels, namely, Low: low-salinity soil, Medium: medium-salinity soil, High: high-salinity soil, Extreme: extreme-salinity soil, and a non-salted site as the control (Non-saline). The results show that bulk density (BD) values significantly increased (p < 0.05), while significantly lower values of soil total carbon (TC), total nitrogen (TN), and fungal Shannon and Chao indexes were observed as the salinization gradient increased (p < 0.05). The relatively high levels of the families Nectriaceae and Cladosporiaceae distinguished two of the clusters, indicating two enterotypes of low (Non-saline and Low) and high (Medium, High, and Extreme) salinity soils, respectively. The family Nectriaceae was most abundant in the networks, and the positive correlations were more pronounced than negative correlations; however, Cladosporiaceae was the family most negatively correlated with others based on the network analysis. At the ecological function level, plant saprotrophs and litter saprotroph were significantly less abundant in extremely saline soil than non-saline soil. The change in soil properties (TC, TN, and BD) caused by soil salinization [salt and electrical conductivity (EC)] regulated the diversity of soil fungal communities, and ecological function, as indicated by Pearson correlation analyses. We suggest further investigation into the ecological functions of soil microorganisms in the extremely saline-alkaline soils of the YRD.

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Section: Discussionsupporting

confidence: 92%

Section: Salinity Effect On Soil Properties Fungal Communities and supporting

confidence: 92%

Section: Introductionmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Salinity Effect On Soil Properties Fungal Communities and mentioning

confidence: 99%

See 3 more Smart Citations

Soil Salinity Drives the Distribution Patterns and Ecological Functions of Fungi in Saline-Alkali Land in the Yellow River Delta, China

Yang

Sun

2020

Front. Microbiol.

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Soil organic matter and geochemical characteristics shape microbial community composition and structure across different land uses in an Australian wet tropical catchment

et al. 2022

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Soil characteristics vary across land uses, and soil microbial communities are likely to respond to such variations. However, such responses are not well understood. In this study, we examined how specific changes in soil organic matter (SOM) and geochemical characteristics influenced the bacterial and fungal community composition and structure across land uses. Soil samples were collected from grazing, sugarcane, forest and banana land uses in the Johnstone River catchment (wet tropics), northeastern Australia. High-throughput sequencing of 16S rRNA gene and ITS amplicons were employed to characterise soil bacterial and fungal communities, respectively. Bacterial and fungal α-diversity did not differ across land uses, whereas strong shifts in their community composition and structure were evident. Patterns in microbial community composition were strongly (p < 0.01) associated with changes in soil total organic carbon and nitrogen (TOC and TN), TOC:TN ratio, hot-water extractable organic carbon (HWEOC) and soil geochemical characteristics (e.g., pH, Co, Mn, K, Mg and P contents). Distinct bacterial community composition was observed in forest soils, while fungal communities were similar in banana and forest soils compared with sugarcane and grazing. Overall, our results showed that SOM characteristics were the major driver on structuring soil microbial communities across land uses, while soil bacterial communities were more sensitive to variations in SOM and geochemical characteristics compared with fungi. Results from this study have implications for developing more targeted management practices across different land uses to improve soil health and ecosystem function in a wet tropical area.

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Interactions between the soil bacterial community assembly and gene regulation in salt‐sensitive and salt‐tolerant sweet sorghum cultivars

Yang

Zheng

et al. 2022

Land Degrad Dev

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Complex bacterial communities in the rhizosphere play a crucial role in plant growth and stress tolerance. These communities vary across cultivars and external environments. However, the influences of salt stress on the structural composition of bacterial microbiome and gene expression of salt‐sensitive and salt‐tolerant sweet sorghum (Sorghum bicolor L. Moench) cultivars have not been studied sufficiently. Here, we employed a combination of 16S rRNA gene profiling and RNA‐seq analysis to characterize changes in root‐associated microbiomes and determine differentially expressed genes (DEG) in the roots of salt‐tolerant M‐81E and salt‐sensitive 'Roma' var. sweet sorghum cultivars under soil conditions with/without salinity. Results revealed that the two contrasting sweet sorghum genotypes selectively filtered and recruited distinct root microbiota in response to salt stress. M‐81E‐enriched bacterial taxa were more diverse and exhibited a higher abundance of metabolic functions than Roma‐enriched taxa. M‐81E‐associated bacterial co‐occurrence networks were more complex and harboured more positive links than Roma‐associated bacterial networks. Furthermore, nine DEG were identified as core salt‐responsive genes and were central to the salt tolerance of sweet sorghum. Correlation analysis revealed that the expression of HSP70, a molecular chaperone, is linked to the recruitment of numerous M‐81E‐enriched bacteria; their relationship needs further exploration. The study supplements the comprehension of the potential role of host–microbe interactions in the response of sweet sorghum to salt stress.

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Assessing the effect of soil salinization on soil microbial respiration and diversities under incubation conditions

Cited by 87 publications

References 35 publications

Soil Salinity Drives the Distribution Patterns and Ecological Functions of Fungi in Saline-Alkali Land in the Yellow River Delta, China

Soil Salinity Drives the Distribution Patterns and Ecological Functions of Fungi in Saline-Alkali Land in the Yellow River Delta, China

Soil organic matter and geochemical characteristics shape microbial community composition and structure across different land uses in an Australian wet tropical catchment

Interactions between the soil bacterial community assembly and gene regulation in salt‐sensitive and salt‐tolerant sweet sorghum cultivars

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