Unveil the role of dissolved and sedimentary metal(loid)s on bacterial communities and metal resistance genes (MRGs) in an urban river of the Qinghai-Tibet Plateau

2022 ◽  
pp. 118050
Author(s):  
Xuming Xu ◽  
Huan Chen ◽  
Jinyun Hu ◽  
Tong Zheng ◽  
Ruijie Zhang ◽  
...  
Keyword(s):  
Resistance Genes ◽  
Bacterial Communities ◽  
Metal Resistance ◽  
Urban River ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

Characterization of the Rickettsia-like and Coxiella-like symbionts in the tick Dermacentor everestianus Hirst, 1926 (Acari: Ixodidae) from the Qinghai-Tibet Plateau

2019 ◽  
Vol 24 (1) ◽  
pp. 106
Author(s):  
Ningxin Li ◽  
Sisi Li ◽  
Duo Wang ◽  
Peng Yan ◽  
Wenying Wang ◽  
...  
Keyword(s):  
Salivary Glands ◽  
Malpighian Tubules ◽  
Tibet Plateau ◽  
The Tibetan Plateau ◽  
Anaplasma Ovis ◽  
Dermacentor Everestianus ◽  
Qinghai Tibet Plateau ◽  
Great Damage

The tick Dermacentor everestianus is widely distributed on the Tibetan Plateau of China, where adult ticks usually parasitize sheep, yaks and horses. D. everestianus is able to transmit many zoonotic pathogens, including Francisella tularensis, Anaplasma ovis and Rickettsia raoultii-like bacteria, and can cause great damage to animals and human health. However, the symbionts in D. everestianus have not yet been investigated, which has hindered our understanding of the relationships between this tick species and associated tick-borne pathogens. In the current study, the Rickettsia-like and Coxiella-like symbionts in D. everestianus were identified and characterized. The results indicated that both Rickettsia-like (RLS-Des) and Coxiella-like (CLS-Des) symbionts showed 100% infection rates and displayed vertical transmission in D. everestianus. The RLS-Des showed a relatively higher abundance than the CLS-Des in D. everestianus. No tissue specificity was found for the RLS-Des or CLS-Des. These symbionts can inhabit the ovaries, salivary glands, midguts, Malpighian tubules and testes of D. everestianus. During the development of D. everestianus, the density of the RLS-Des showed more obvious changes than did that of the CLS-Des. Dramatic changes in the density of the RLS-Des were detected in the midguts, ovaries, salivary glands and Malpighian tubules when female D. everestianus were engorged and detached from the host, which suggested the potential role of these symbionts in the reproduction and development of D. everestianus. The dynamic changes in the density of the CLS-Des during feeding and reproduction of D. everestianus suggest the involvement of the CLS-Des in the reproduction of D. everestianus. 

scholarly journals Comparisons of lung and gluteus transcriptome profiles between yaks at different ages

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jin-Wei Xin ◽  
Zhi-Xin Chai ◽  
Cheng-Fu Zhang ◽  
Qiang Zhang ◽  
Yong Zhu ◽  
...  
Keyword(s):  
Immune System ◽  
Immune Function ◽  
Muscle Injury ◽  
Tibet Plateau ◽  
Immune Functions ◽  
Immune System Activation ◽  
System Activation ◽  
Qinghai Tibet Plateau ◽  
Activation Status

Abstract The yak, Bos grunniens, is the only large mammal in the Qinghai-Tibet Plateau and has been bred to provide meat, milk, and transportation. Previous studies indicate that the immune system contributes to the yak’s adaptation to high-altitude environments. In order to further investigate changes in immune function during yak development, we compared the transcriptome profiles of gluteus and lung tissues among yaks at 6, 30, 60, and 90 months of age. Analyses of significantly differentially expressed genes (DEGs) in lung tissues revealed that immune function was more activated at 6-months and less activated at 90-months than in the 30 and 60-month-old animals. DEG exploration in gluteal tissues revealed that immune functions were more highly activated at both 6 and 90-months, compared with 30 and 60-months. Immune system activation in the muscle and lung tissues of 30-month-old yaks may increase their resistance to infections, while decreased may be due to aging. Furthermore, the higher immune activation status in the gluteal tissues in 90-month-old yaks could be due to muscle injury and subsequent regeneration, which is supported by the fact that 5 unigenes related with muscle injury and 3 related to muscle regeneration displayed greater expression levels at 90-months than at 30 and 60-months. Overall, the present study highlights the important role of the immune system in yak development, which will facilitate future investigations.

scholarly journals Large‐scale distribution of bacterial communities in the Qaidam Basin of the Qinghai–Tibet Plateau

2019 ◽  
Vol 8 (10) ◽  
Author(s):  
Rui Xing ◽  
Qing‐bo Gao ◽  
Fa‐qi Zhang ◽  
Jiu‐li Wang ◽  
Shi‐long Chen
Keyword(s):  
Bacterial Communities ◽  
Large Scale ◽  
Qaidam Basin ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

Simulating the role of gravel in freeze–thaw process on the Qinghai–Tibet Plateau

2015 ◽  
Vol 127 (3-4) ◽  
pp. 1011-1022 ◽  
Author(s):  
Yongjie Pan ◽  
Shihua Lyu ◽  
Suosuo Li ◽  
Yanhong Gao ◽  
Xianhong Meng ◽  
...  
Keyword(s):  
Tibet Plateau ◽  
Freeze Thaw ◽  
Qinghai Tibet Plateau

scholarly journals Effects of Flurochloridone Application on Rhizosphere Soil Fungal Community and Composition in Potato Growing Areas of the Qinghai-Tibet Plateau

2021 ◽  
Vol 7 (6) ◽  
pp. 420
Author(s):  
Wei Li ◽  
Shuo Shen ◽  
Hongyu Chen ◽  
Yang Zhang ◽  
Lei Deng ◽  
...  
Keyword(s):  
Fungal Community ◽  
Rhizosphere Soil ◽  
Arable Land ◽  
Agricultural Practices ◽  
Tibet Plateau ◽  
Fungal Community Structure ◽  
Major Species ◽  
Soil Fungal Community ◽  
Qinghai Tibet Plateau

The application of herbicides to arable land is still the most effective and accepted method to protect plants from weeds. Extensive use of chemicals in conventional agricultural practices has resulted in continuous and serious environmental pollution. Flurochloridone (FLC) is a monophenyl pyrrolidinone selective herbicide that is commonly used to inhibit weeds that occur during the growth of potatoes. In recent years, research on the toxicity of FLC has gradually increased. However, it is relatively rare to analyze the role of FLC by studying the composition of soil microorganisms. Therefore, we used NGS methods to identify the fungal community structure of the low content soil (LS) and high content soil (HS) samples in this study. Subsequently, we identified the fungal community and composition differences of these two group samples using the statistical analysis. Despite the variances of fungal community and composition across the different samples within the group, the fungal composition of the LS samples and the HS samples. LS samples were predominated by Ascomycota, while the HS samples were predominated by Mortierellomycota and Basidiomycota. The major species in the LS samples were Plectosphaerella cucumerina and Trichocladium asperum, whereas the dominant species in the HS samples were Epicoccum nigrum and Cladosporium chasmanthicola. These results suggested that the LS samples and the HS samples had different rhizosphere soil fungal community and composition changes resulting from implementation of FLC in potato growing areas.

scholarly journals Responses of Bacterial Communities to Simulated Climate Changes in Alpine Meadow Soil of the Qinghai-Tibet Plateau

2015 ◽  
Vol 81 (17) ◽  
pp. 6070-6077 ◽  
Author(s):  
Junpeng Rui ◽  
Jiabao Li ◽  
Shiping Wang ◽  
Jiaxing An ◽  
Wen-tso Liu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Climate Warming ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
Climate Changes ◽  
Tibet Plateau ◽  
Content Type ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Qinghai Tibet Plateau

ABSTRACTThe soil microbial community plays an important role in terrestrial carbon and nitrogen cycling. However, microbial responses to climate warming or cooling remain poorly understood, limiting our ability to predict the consequences of future climate changes. To address this issue, it is critical to identify microbes sensitive to climate change and key driving factors shifting microbial communities. In this study, alpine soil transplant experiments were conducted downward or upward along an elevation gradient between 3,200 and 3,800 m in the Qinghai-Tibet plateau to simulate climate warming or cooling. After a 2-year soil transplant experiment, soil bacterial communities were analyzed by pyrosequencing of 16S rRNA gene amplicons. The results showed that the transplanted soil bacterial communities became more similar to those in their destination sites and more different from those in their “home” sites. Warming led to increases in the relative abundances inAlphaproteobacteria,Gammaproteobacteria, andActinobacteriaand decreases inAcidobacteria,Betaproteobacteria, andDeltaproteobacteria, while cooling had opposite effects on bacterial communities (symmetric response). Soil temperature and plant biomass contributed significantly to shaping the bacterial community structure. Overall, climate warming or cooling shifted the soil bacterial community structure mainly through species sorting, and such a shift might correlate to important biogeochemical processes such as greenhouse gas emissions. This study provides new insights into our understanding of soil bacterial community responses to climate warming and cooling.

scholarly journals Pyrosequencing investigation into the bacterial communities in the Qinghai-Tibet Plateau soils associated with soil characteristic factors

2020 ◽  
Vol 33 ◽  
pp. 57-71
Author(s):  
Liang Cheng ◽  
Xin Wang ◽  
Qingyun Guo
Keyword(s):  
Soil Moisture ◽  
Organic Carbon ◽  
Bacterial Communities ◽  
Phylogenetic Diversity ◽  
Tibet Plateau ◽  
Soil Types ◽  
Desert Soils ◽  
Mountain Meadow ◽  
Bacterial Phyla ◽  
Qinghai Tibet Plateau

The Qinghai Tibet Plateau (QTP) is one of the most important regions of the earth’s ecosystem that is vulnerable to climate and human activities due to its complex climate and terrain. However, knowledge about soil bacterial communities and their effect on the ecosystem within the QTP environments is still scarce. Metagenomic approaches on the structure and diversity of bacterial communities and their relationship with the environment from eighteen selected sites of the five major QTP ecosystems (gray-cinnamon soils, chernozems, castanozems, mountain meadow soils, gray desert soils) are presented in this paper. The dominant bacterial phyla in five type soils were Proteobacteria and Actinobacteria, whereas Actinobacteria and Chloroflexi predominated in gray desert soils. The bacteria diversity in castanozeras and mountain meadow soils was significantly higher than that of the other three soil types (P < 0.05). Phylogenetic diversity in gray desert soil was significantly lower than that of other four soil types (P < 0.05). Phylotype richness was the lowest in gray-cinnamon soils. There were significant correlations between the phylotype richness and soil moisture (r = -0.578) and potassium (r = -0.529). Phylogenetic diversity (PD) was significantly correlated with total organic carbon (r = -0.548). The redundancy analysis (RDA) showed that the diversity and composition in the bacterial communities differed greatly among the five soil types and that they were closely correlated with the soil moisture, soil organic carbon and potassium. These results indicated that the bacterial community structures of QTP soils were obviously influenced by soil characteristics and soil environmental characteristics and provided a theoretical basis for the optimal management and sustainable utilization of the QTP soil ecosystem, which is of great significance.

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