Article
Microbiology
Hong Zhou, Lun Li, Yunxiang Liu
Summary: Biological soil crusts (BSCs) are important for primary production in dryland ecosystems, and bacteria play critical roles in maintaining their structure and functions. However, the process by which bacterial diversity and community change during BSC development is not well understood.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Environmental Sciences
Ying Wen, Gaosen Zhang, Wei Zhang, Guangxiu Liu
Summary: Deserts are extreme environments with multiple environmental stresses. Bacteria in desert ecosystems have diverse functions and play important roles.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Ecology
Thi Bao-Anh Nguyen, Michael Bonkowski, Kenneth Dumack, Qing-Lin Chen, Ji-Zheng He, Hang-Wei Hu
Summary: This study investigated the response of antibiotic resistance genes (ARGs) in soil to predation pressure from protists. The results showed that an increase in protistan predation pressure was associated with higher abundance and diversity of ARGs in the soil. High concentrations of protists significantly increased the abundance of genes encoding multidrug and tetracycline resistance, as well as the abundance of certain bacterial genera.
Article
Microbiology
Maria Jose Contreras, Karla Leal, Pablo Bruna, Kattia Nunez-Montero, Olman Gomez-Espinoza, Andres Santos, Leon Bravo, Bernardita Valenzuela, Francisco Solis, Giovanni Gahona, Mayra Cayo, M. Alejandro Dinamarca, Claudia Ibacache-Quiroga, Pedro Zamorano, Leticia Barrientos
Summary: Plant-microbiota interactions play a significant role in plant growth, health, and productivity. In this study, the composition of rhizobacterial community associated with plants from Antarctic and Atacama Desert was examined. The core microbiome identified in the rhizosphere included beneficial taxa that are associated with survival under harsh conditions. The functional predictions also aligned with the ability to withstand stressful environments. This study provides valuable information for the exploration of rhizospheric microorganisms in extreme conditions and their potential as plant growth-promoting rhizobacteria.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Agronomy
Lixin Tian, Pengliang Chen, Zhijun Gao, Xiaoli Gao, Baili Feng
Summary: In this study, the spatial distribution and association networks of bacteria and fungi in the rhizosphere of broomcorn millet were explored. It was found that environmental selection was the main factor determining bacterial diversity, while fungal diversity was influenced by both environmental selection and dispersal limitation. Mean annual temperature and pH were identified as important drivers of bacterial and fungal community structure.
Article
Agronomy
Juana Munoz-Ucros, Roland C. Wilhelm, Daniel H. Buckley, Taryn L. Bauerle
Summary: The study found that plants are affected by the legacy effects of drought on the rhizosphere microbiome. This drought legacy was propagated and persisted throughout nine weeks of plant growth, independent of prevailing water stress. Drought-impacted rhizospheres had larger populations of desiccation-tolerant and putatively endophytic taxa with established plant growth promoting capabilities.
Article
Microbiology
Yang Zhang, Yujie Zhang, Wenjie Xu, Jian Hu, Zujian Zhang
Summary: This study investigated the effect of climate and rice variety on the rhizosphere bacterial community. Results showed that climate had a stronger influence on the community than rice variety, with diversity positively correlated with temperature and negatively correlated with temperature range. Changes in the rhizosphere community were associated with temperature and were enriched in Proteobacteria and Bacteroidetes, while Actinobacteria decreased. Additionally, the changes in the rhizosphere community were closely related to rice yield formation.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Geography, Physical
Jing Lei, Zhengguo Shi, Xiaoning Xie, Xinzhou Li
Summary: Based on climate model experiments, this study found that the precipitation during the Last Glacial Maximum (LGM) was significantly different from that of the preindustrial period in the terrestrial monsoon regions and arid regions of the Northern Hemisphere. The decrease in sea surface temperature and expansion of the ice sheet were the main contributors to lessening precipitation in the monsoon regions, while the decrease in precipitation in the arid regions can be mainly attributed to ice-sheet-induced albedo and topography changes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Microbiology
Zhihao Zhang, Xutian Chai, Akash Tariq, Fanjiang Zeng, Xiangyi Li, Corina Graciano
Summary: The study found that plant species significantly affected microbial communities in monocultures, but not in intercropping systems. Intercropping induced a more complex rhizosphere microbial community and a more stable bulk soil microbial network. Keystone taxa were prevalent in intercropping systems, mainly Actinobacteria. Overall, planting patterns and soil compartments, rather than plant identities, played a key role in differentiating root-associated microbiomes. Intercropping can modify the co-occurrence patterns of bulk soil and rhizosphere microorganisms in desert ecosystems.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Soil Science
Tayler C. Ulbrich, Albert Rivas-Ubach, Lisa K. Tiemann, Maren L. Friesen, Sarah E. Evans
Summary: The presence of neighboring plants can alter the root exudates and rhizosphere community of a focal plant, and the most competitive neighbor has the largest impact. Neighbor-induced changes in root exudates and microbial spillover from larger neighbors contribute to shifts in rhizosphere assembly. These changes in exudates can have greater effects on soil nutrients than on microbial assembly. This study emphasizes the importance of considering neighborhood context in microbiome studies.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Agronomy
Masataka Nakayama, Ryunosuke Tateno
Summary: The microbial communities in the soil surrounding plant roots (rhizosphere) are distinct from those in the non-rhizosphere soil due to root exudation and symbiosis with plant roots. However, little is known about the seasonal variations in these rhizosphere microbial communities, especially during the dormant season of cool temperate forests.
Article
Ecology
Michelle E. Dan, Lydia A. Olaka, Mamo Boru Mamo, Duncan Mutiso Chalo, Aida Cuni-Sanchez
Summary: The study in northern Kenya found that both the Gabra and Borana communities value the desert landscape for its landscape services, including provisioning, regulating, supporting, and cultural services. They identified freshwater, pasture, and physical and mental well-being as the most important landscape services provided by the desert. Despite some differences, both communities anticipated both positive and negative impacts of future development projects.
ECOSYSTEM SERVICES
(2021)
Article
Microbiology
Xiao Sun, Jin Pei, Lei Zhao, Bashir Ahmad, Lin-Fang Huang
Summary: The study suggests that the suitable production areas for three desert plants are expected to expand under global warming, demonstrating their high adaptability to future climate change. Soil bacterial communities composition is influenced by environmental factors, with decreased α-diversity along elevated latitudes, and deterministic processes dominate the assembly of bacterial communities in the three desert plants.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Ecology
Xiaoyulong Chen, Lisa Krug, Maofa Yang, Gabriele Berg, Tomislav Cernava
Summary: The bacterial communities in different microhabitats of Himalayan onion showed varying levels of diversity, with the rhizosphere having the highest diversity. A unique feature of the microbiome was its high evenness in taxonomic distribution, and plant-specific signature bacteria like Pseudomonas were identified. The study provides insights into the microbiome of the Allium genus and can facilitate comparisons with domesticated relatives for bioresource mining.
Article
Microbiology
Keming Yang, Xiaofang Wang, Rujiao Hou, Chunxia Lu, Zhe Fan, Jingxuan Li, Shuo Wang, Yangchun Xu, Qirong Shen, Ville-Petri Friman, Zhong Wei
Summary: This study investigates the influence of rhizosphere phage communities on soil suppressiveness and bacterial wilt disease. It shows that healthy plants are associated with phage communities that have stronger control over the pathogen R. solanacearum. Additionally, phages that target pathogen-inhibiting bacteria are more abundant in diseased plant microbiomes. These findings suggest that rhizosphere phage communities play a crucial role in determining bacterial wilt disease outcomes and soil suppressiveness.