Bacterial communities in the rhizosphere of different populations of the Ni-hyperaccumulator Alyssum serpyllifolium and the metal-excluder Dactylis glomerata growing in ultramafic soils

2018 ◽  
Vol 431 (1-2) ◽  
pp. 317-332 ◽  
Author(s):  
M. Touceda-González ◽  
P. S. Kidd ◽  
K. Smalla ◽  
A. Prieto-Fernández
Keyword(s):  
Bacterial Communities ◽  
Dactylis Glomerata ◽  
Ultramafic Soils ◽  
Different Populations ◽  
Alyssum Serpyllifolium

Microbiological functioning, diversity, and structure of bacterial communities in ultramafic soils from a tropical savanna

2015 ◽  
Vol 107 (4) ◽  
pp. 935-949 ◽  
Author(s):  
Marco Pessoa-Filho ◽  
Cristine Chaves Barreto ◽  
Fábio Bueno dos Reis Junior ◽  
Rodrigo Rocha Fragoso ◽  
Flávio Silva Costa ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Ultramafic Soils ◽  
Tropical Savanna

scholarly journals Definition of Core Bacterial Taxa in Different Root Compartments of Dactylis glomerata, Grown in Soil under Different Levels of Land Use Intensity

Diversity ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 392
Author(s):  
Jennifer Estendorfer ◽  
Barbara Stempfhuber ◽  
Gisle Vestergaard ◽  
Stefanie Schulz ◽  
Matthias Rillig ◽  
...  
Keyword(s):  
Land Use ◽  
Bacterial Communities ◽  
Environmental Changes ◽  
Dactylis Glomerata ◽  
Healthy Plant ◽  
Compositional Variation ◽  
Land Use Intensity ◽  
Core Microbiome ◽  
Molecular Barcoding ◽  
Dactylis Glomerata L

Plant-associated bacterial assemblages are critical for plant fitness. Thus, identifying a consistent plant-associated core microbiome is important for predicting community responses to environmental changes. Our target was to identify the core bacterial microbiome of orchard grass Dactylis glomerata L. and to assess the part that is most sensitive to land management. Dactylis glomerata L. samples were collected from grassland sites with contrasting land use intensities but comparable soil properties at three different timepoints. To assess the plant-associated bacterial community structure in the compartments rhizosphere, bulk soil and endosphere, a molecular barcoding approach based on high throughput 16S rRNA amplicon sequencing was used. A distinct composition of plant-associated core bacterial communities independent of land use intensity was identified. Pseudomonas, Rhizobium and Bradyrhizobium were ubiquitously found in the root bacterial core microbiome. In the rhizosphere, the majority of assigned genera were Rhodoplanes, Methylibium, Kaistobacter and Bradyrhizobium. Due to the frequent occurrence of plant-promoting abilities in the genera found in the plant-associated core bacterial communities, our study helps to identify “healthy” plant-associated bacterial core communities. The variable part of the plant-associated microbiome, represented by the fluctuation of taxa at the different sampling timepoints, was increased under low land use intensity. This higher compositional variation in samples from plots with low land use intensity indicates a more selective recruitment of bacteria with traits required at different timepoints of plant development compared to samples from plots with high land use intensity.

Gene Polymorphisms and Their Association to Coronavirus Family Infections: Susceptibility in Different Populations

2020 ◽  
Vol 5 ◽  
Keyword(s):  
Genetic Variants ◽  
Viral Infections ◽  
Human Leukocyte ◽  
Asian Population ◽  
African Region ◽  
Mediterranean Populations ◽  
Susceptibility To Infection ◽  
Asian Populations ◽  
Spread Pattern ◽  
Different Populations

Human leukocyte antigen (HLA) loci are highly polymorphic and determine differential features of the immune response in subjects from different regions. HLA genes have been proposed to determine genetic susceptibility to several diseases, particularly to viral infections. Moreover, it has been suggested that each ethnic group could have a different specificity of T-lymphocyte reactivity to the same viral infections. In this review, we analyzed the distribution of HLA types in countries of the Asian, European and North African region. Also, we studied the relation between these HLA polymorphisms and susceptibility to infection by the coronavirus. Our findings indicated that homozygosity would increase susceptibility to viral infections and, in some cases, to coronavirus infection. HLA types showing higher susceptibility were reported in Asian population, including China, Singapore, and Taiwan. In contrast, lower susceptibility HLA variants were detected among African populations, some Asian populations, and Mediterranean populations. The presented evidence along with the spread pattern of COVID-19 infection suggests that HLA genetic variants might be related to its infection susceptibility and severity. The investigation of HLA genetic variants distribution would be a useful tool to predict different populations’ susceptibility to viral infections.

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