Dominant plants affect litter decomposition mainly through modifications of the soil microbial community

Yang, Xue; Wang, Xiangtai; Xiao, Sa; Liu, Ziyang; Zhou, Xianhui; Du, Guozhen; Liu, Kun; Wang, Yajun; Chen, Shuyan; Nielsen, Uffe N.

doi:10.1016/j.soilbio.2021.108399

Cited by 46 publications

(31 citation statements)

References 60 publications

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Section: Introductionmentioning

confidence: 99%

“…Artificial management leads to specific plants becoming the dominant species within a particular area and their litter can significantly impact soil characteristics, including soil microbial composition and function ( 1 , 2 ). Plant litter decomposition is a complex, long-term process ( 2 – 4 ). In addition to organic matter and nutrients, plant secondary metabolites (PSMs) that are recalcitrant to degradation are also released into soil ( 3 ).…”

Section: Introductionmentioning

confidence: 99%

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Increased Tea Saponin Content Influences the Diversity and Function of Plantation Soil Microbiomes

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Increased Tea Saponin Content Influences the Diversity and Function of Plantation Soil Microbiomes

et al. 2022

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“…However, the upper micro-habitats (T. chinensis, T. chinensis-S. salsa, and S. salsa communities) were suffered by short-time flooding and strong evaporation, which should be the major reasons and thus to aggregate the higher EC and lower SMC in these surface soils (Kearney and Fagherazzi, 2016;Zhou et al, 2020). Moreover, soil nutrients of the lower micro-habitats were taken away by tidal fluctuation, meanwhile accumulated in the upper micro-habitats due to litter decompositions (Chomel et al, 2016;Koceja et al, 2021;Yang et al, 2021). The present study found the bacterial community structures were significantly different in the five micro-habitats on the tidal creek sections, and these differences may be greatly affected by the tidal action and soil properties together.…”

Section: Discussionmentioning

confidence: 99%

Soil Bacterial Community Structure in Different Micro-Habitats on the Tidal Creek Section in the Yellow River Estuary

Wang

Yang

et al. 2022

Front. Ecol. Evol.

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Tidal creeks have attracted considerable attention in estuary wetland conservation and restoration with diverse micro-habitats and high hydrological connectivity. Bacterial communities act effectively as invisible engines to regulate nutrient element biogeochemical processes. However, few studies have unveiled the bacterial community structures and diversities of micro-habitats soils on the tidal creek section. Our study selected three sections cross a tidal creek with obviously belt-like habitats “pluff mudflat – bare mudflat – Tamarix chinensis community – T. chinensis-Suaeda salsa community– S. salsa community” in the Yellow River estuarine wetland. Based on soil samples, we dissected and untangled the bacterial community structures and special bacterial taxa of different habitats on the tidal creek section. The results showed that bacterial community structures and dominant bacterial taxa were significantly different in the five habitats. The bacterial community diversities significantly decreased with distance away from tidal creeks, as well as the dominant bacteria Flavobacteriia and δ-Proteobacteria, but in reverse to Bacteroidetes and Gemmatimonadetes. Moreover, the important biomarkers sulfate-reducing bacteria and photosynthetic bacteria were different distributions within the five habitats, which were closely associated with the sulfur and carbon cycles. We found that the bacterial communities were heterogeneous in different micro-habitats on the tidal creek section, which was related to soil salinity, moisture, and nutrients as well as tidal action. The study would provide fundamental insights into understanding the ecological functions of bacterial diversities and biogeochemical processes influenced by tidal creeks.

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“…The interaction of plants-microorganisms-soil is the key to realizing plant community exchanges, changing biological diversity, and ecosystem functions (Mueller et al 2020). As the core driving force of nutrient cycling and energy transformation (Shao et al 2019), soil microbial communities are extremely sensitive to changes in the external environment, and their quantity and structural composition are affected by the soil environment and the dominant plant groups in the habitat (Yang et al 2021). Decomposition of the stubble of E. densa led to an increase in soil pH, which effectively improves the living environment of soil bacteria (Li et al 2022).…”

Section: Discussionmentioning

confidence: 99%

Allelochemicals-based expansion of Elsholtzia densa Benth. hindering plants’defense function: case study of Hordeum vulgare L.

Zhou

Xiao²,

Ma³

et al. 2022

Preprint

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Background The root extracellular trap (RET) comprising root border cells (RBCs) and their secretions are plants' first line of defense to resist external stress. Since soil microorganisms are closely related to nutrient circulation, this study chooses a poisonous weed Elsholtzia densa Benth. (E. densa) in alpine meadows on the Qinghai-Tibet Plateau (QTP) to explore the mechanism of its rapid expansion. Methods Bioassays and pure agar suspension air culture methods are used to determine the effects of the decomposing substances of E. densa on the RBCs characteristics of the plateau crop highland barley (Hordeum vulgare L.), soil nutrients, soil enzyme activities, and soil bacteria, using microscopic techniques and biochemical analysis techniques.Results The decomposing allelopathic effect of the E. densa mainly occurs in the early stage of decomposing, with its decomposing solution thickening the RBC’s mucilage layer and decreasing the RBC’s activity and even apoptosis. The decomposed product of the E. densa changes the diversity of the soil bacterial and species composition, affects soil nutrient content, and increases the activities of various extracellular enzymes.Conclusions During the expansion, the E. densa releases allelochemicals to its surroundings interfering with the surrounding plants' defense function and directly inhibiting their growth. At the same time, the stubble's decomposition changes soil microbial activities, enriches the soil nutrients, and forms a self-interested soil environment. Eventually, the E. densa gains an edge over the competition.

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Dominant plants affect litter decomposition mainly through modifications of the soil microbial community

Cited by 46 publications

References 60 publications

Increased Tea Saponin Content Influences the Diversity and Function of Plantation Soil Microbiomes

Increased Tea Saponin Content Influences the Diversity and Function of Plantation Soil Microbiomes

Soil Bacterial Community Structure in Different Micro-Habitats on the Tidal Creek Section in the Yellow River Estuary

Allelochemicals-based expansion of Elsholtzia densa Benth. hindering plants’defense function: case study of Hordeum vulgare L.

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