Diminished rhizosphere and bulk soil microbial abundance and diversity across succession stages in Karst area, southwest China

Xu, Huifang; Du, Hu; Zeng, Fuping; Song, Tao; Peng, Weidan

doi:10.1016/j.apsoil.2020.103799

Cited by 25 publications

(17 citation statements)

References 69 publications

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“…pH has a major impact on the mobility of multiple compounds in the soil and affects many connected biological processes [ 64 ]. SOC has been considered as the major factor influencing microbial community structure, especially bacteria [ 63 , 65 ]. The present study also shows that SOC has a significant impact on the bacterial community structure in bulk soils.…”

Section: Discussionmentioning

confidence: 99%

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Kunnan

Huang

et al. 2021

Biology

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Soil bacterial communities play crucial roles in ecosystem functions and biogeochemical cycles of fundamental elements and are sensitive to environmental changes. However, the response of soil bacterial communities to chronosequence in tropical ecosystems is still poorly understood. This study characterized the structures and co-occurrence patterns of soil bacterial communities in rhizosphere and bulk soils along a chronosequence of teak plantations and adjacent native grassland as control. Stand ages significantly shifted the structure of soil bacterial communities but had no significant impact on bacterial community diversity. Bacterial community diversity in bulk soils was significantly higher than that in rhizosphere soils. The number of nodes and edges in the bacterial co-occurrence network first increased and then decreased with the chronosequence. The number of strongly positive correlations per network was much higher than negative correlations. Available potassium, total potassium, and available phosphorus were significant factors influencing the structure of the bacterial community in bulk soils. In contrast, urease, total potassium, pH, and total phosphorus were significant factors affecting the structure of the bacterial community in the rhizosphere soils. These results indicate that available nutrients in the soil are the main drivers regulating soil bacterial community variation along a teak plantation chronosequence.

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Section: Discussionmentioning

confidence: 99%

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Kunnan

Huang

et al. 2021

Biology

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“…The microbial signal can vary based on the plant types, soil properties, and root exudates during the interaction of plantmicrobe in the region of the rhizosphere [28]. A recent study noticed a positive correlation between the abundance of rhizospheric bacteria and fungi with soil organic matter (SOC) and conducive pH conditions [29]. Additionally, the vegetation patterns of the soil rhizosphere may also trigger the microbial ecology of the rhizosphere.…”

Section: Rhizosphere As a Crucial Hotbed For Plant-beneficial Rhizobacteria Interactionmentioning

confidence: 99%

“…The alternate name of beneficial rhizobacteria is plant growth promoting rhizobacteria (PGPR). According to previous research, PGPR has a beneficial effect on the enhancement of plant growth and sustainable plant nutrition management through direct or indirect approaches [19,29]. Several plant-microbe interactions near the plant rhizosphere are the key regulator for plant growth enhancement.…”

Section: Beneficial Role Of Rhizobacteria For the Enhancement Of Soil And Plant Healthmentioning

confidence: 99%

“…The system signals may ignite the mechanism of plant-rhizobacteria interaction, and thus it emerges as a positive communication among the respective stakeholders through root exudates [22,24]. A recent study demonstrated the holistic aspect of PGPR by revisiting a study aimed at the long-term and practical deployment of screened PGPR strains in real-world situations [28][29][30][31][32]. The detailed application of beneficial rhizobacteria is described according to their functions (Table 1).…”

Section: Beneficial Role Of Rhizobacteria For the Enhancement Of Soil And Plant Healthmentioning

confidence: 99%

“…In addition, PGPR improves soil health through decomposing crop residues, synthesizing and mineralizing soil organic matter [189]. Soil organic matter and root signaling for the secretion of exudates at the rhizosphere region act as the key factors for the positive interaction of the rhizospheric microbiome with the plant to improve soil quality [25,29]. Thus, PGPR are considered the best natural alternatives to chemical fertilizers to maintain sustainable soil health.…”

Section: Application Of Pgpr For Sustainable Soil Health and Native Microbial Diversitymentioning

confidence: 99%

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Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

et al. 2021

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Climate change imposes biotic and abiotic stresses on soil and plant health all across the planet. Beneficial rhizobacterial genera, such as Bacillus, Pseudomonas, Paraburkholderia, Rhizobium, Serratia, and others, are gaining popularity due to their ability to provide simultaneous nutrition and protection of plants in adverse climatic conditions. Plant growth-promoting rhizobacteria are known to boost soil and plant health through a variety of direct and indirect mechanisms. However, various issues limit the wider commercialization of bacterial biostimulants, such as variable performance in different environmental conditions, poor shelf-life, application challenges, and our poor understanding on complex mechanisms of their interactions with plants and environment. This study focused on detecting the most recent findings on the improvement of plant and soil health under a stressful environment by the application of beneficial rhizobacteria. For a critical and systematic review story, we conducted a non-exhaustive but rigorous literature survey to assemble the most relevant literature (sorting of a total of 236 out of 300 articles produced from the search). In addition, a critical discussion deciphering the major challenges for the commercialization of these bioagents as biofertilizer, biostimulants, and biopesticides was undertaken to unlock the prospective research avenues and wider application of these natural resources. The advancement of biotechnological tools may help to enhance the sustainable use of bacterial biostimulants in agriculture. The perspective of biostimulants is also systematically evaluated for a better understanding of the molecular crosstalk between plants and beneficial bacteria in the changing climate towards sustainable soil and plant health.

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Phylogeography of Morella nana: The Wumeng Mountains as a natural geographical isolation boundary on the Yunnan‐Guizhou Plateau

Wu,

Cheng,

Jiang

et al. 2024

Ecology and Evolution

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The Yunnan‐Guizhou Plateau (YGP) is characterized by the distinctive isolated habitat of the limestone Karst Islands and features the Wumeng Mountains, which divide the YGP into the two Plateaus of Yunnan and Guizhou. This study aimed to assess the effects of geographic isolation and past climate fluctuation on the distribution of flora in the YGP. To achieve this, we carried out the phylogeographical pattern and genetic structure based on chloroplast and nuclear ribosomal DNA sequence in relation to past (Last Glacial Maximum) and present distributions based on ecological niche modeling for Morella nana, an important wild plant resource and endemic to the YGP once considered a vulnerable species. The results suggest that the genetic and chlorotype network structures of M. nana are divided into at least two groups: cpDNA chlorotype H2 (or dominant nrDNA haplotypes h1 and h2), distributed primarily to the east of the Wumeng Mountains, and cpDNA chlorotypes H1 and H3–H10 (or dominant nrDNA haplotype h2 and h3), distributed to the west of the Wumeng Mountains. A deep genetic split was noted within the two groups to reach 25 steps, especially for the cpDNA fragment variation. This east–west divergence reveals the existence of a natural geographical isolation boundary in the form of the Wumeng Mountains, and supports the existence of at least two glacial refuges during the Quaternary glacial period, along with two genetic diversity center, and at least two large geographic protection units for the important species of M. nana. This study indicates that the phylogeographical pattern of M. nana can be attributed to geographic/environmental isolation caused by the Wumeng Mountains and climate fluctuation during the last glacial maximum, and proposes an effective strategy to protecting this important plant resource.

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Diminished rhizosphere and bulk soil microbial abundance and diversity across succession stages in Karst area, southwest China

Cited by 25 publications

References 69 publications

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Soil Bacterial Community Shifts Are Driven by Soil Nutrient Availability along a Teak Plantation Chronosequence in Tropical Forests in China

Prospect and Challenges for Sustainable Management of Climate Change-Associated Stresses to Soil and Plant Health by Beneficial Rhizobacteria

Phylogeography of Morella nana: The Wumeng Mountains as a natural geographical isolation boundary on the Yunnan‐Guizhou Plateau

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