scholarly journals Associations between Ectomycorrhizal Fungi and Bacterial Needle Endophytes in Pinus radiata: Implications for Biotic Selection of Microbial Communities

2016 ◽  
Vol 7 ◽  
Author(s):  
Megan A. Rúa ◽  
Emily C. Wilson ◽  
Sarah Steele ◽  
Arielle R. Munters ◽  
Jason D. Hoeksema ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Ectomycorrhizal Fungi ◽  
Pinus Radiata ◽  
Selection Of

Performance differences in Pinus radiata progeny with differing site nutrient availability

2004 ◽  
Vol 34 (12) ◽  
pp. 2410-2423 ◽  
Author(s):  
S D Carson ◽  
M F Skinner ◽  
A T Lowe ◽  
M O Kimberley
Keyword(s):  
Nutrient Availability ◽  
Pinus Radiata ◽  
Nutrient Concentration ◽  
Radiata Pine ◽  
Substantial Improvement ◽  
Treatment Combination ◽  
Control Seed ◽  
Foliar Nutrient ◽  
Selection For ◽  
Selection Of

Two intensive harvesting trials with contrasting nutrient capital were examined for genetic × environment interactions to age 5 years after planting. Treatments included differences in removal of organic matter and in site preparation and weed control, with each treatment having both fertilized and nonfertilized plots. Three harvest treatments (both fertilized and nonfertilized) were common to both sites, with two additional treatments at one site. There were four replicate plots of each treatment combination at each site, with two trees from each of three control seed lots and 47 open-pollinated families chosen to represent the range of performance for growth planted in each plot. Large differences among sites and among treatments in both growth and foliar nutrient concentration were observed. Genetic × site interactions and genetic × treatment within site interactions were seldom significant. Significant interactions did not appear to be related to changes in rankings of families, but rather to the differences in variance among families in different treatments. This study suggests that selection of specific radiata pine (Pinus radiata D. Don) families for better growth performance on nutrient-deficient sites in New Zealand would not result in substantial improvement over selection for growth on all sites disregarding nutrient availability.

scholarly journals Sources and selection of snow-specific microbial communities in a Greenlandic sea ice snow cover

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lorrie Maccario ◽  
Shelly D. Carpenter ◽  
Jody W. Deming ◽  
Timothy M. Vogel ◽  
Catherine Larose
Keyword(s):  
Sea Ice ◽  
Microbial Communities ◽  
Snow Cover ◽  
Selection Of

scholarly journals Understanding the evolution of interspecies interactions in microbial communities

2020 ◽  
Vol 375 (1798) ◽  
pp. 20190256 ◽  
Author(s):  
Florien A. Gorter ◽  
Michael Manhart ◽  
Martin Ackermann
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Interaction Strength ◽  
Quantitative Model ◽  
Systematic Effect ◽  
Interspecies Interactions ◽  
Fitness Effects ◽  
Indirect Fitness ◽  
Beneficial Traits ◽  
Selection Of

Microbial communities are complex multi-species assemblages that are characterized by a multitude of interspecies interactions, which can range from mutualism to competition. The overall sign and strength of interspecies interactions have important consequences for emergent community-level properties such as productivity and stability. It is not well understood how interspecies interactions change over evolutionary timescales. Here, we review the empirical evidence that evolution is an important driver of microbial community properties and dynamics on timescales that have traditionally been regarded as purely ecological. Next, we briefly discuss different modelling approaches to study evolution of communities, emphasizing the similarities and differences between evolutionary and ecological perspectives. We then propose a simple conceptual model for the evolution of interspecies interactions in communities. Specifically, we propose that to understand the evolution of interspecies interactions, it is important to distinguish between direct and indirect fitness effects of a mutation. We predict that in well-mixed environments, traits will be selected exclusively for their direct fitness effects, while in spatially structured environments, traits may also be selected for their indirect fitness effects. Selection of indirectly beneficial traits should result in an increase in interaction strength over time, while selection of directly beneficial traits should not have such a systematic effect. We tested our intuitions using a simple quantitative model and found support for our hypotheses. The next step will be to test these hypotheses experimentally and provide input for a more refined version of the model in turn, thus closing the scientific cycle of models and experiments. This article is part of the theme issue ‘Conceptual challenges in microbial community ecology’.

scholarly journals Selection of Sphingomonadaceae at the Base of Laccaria proxima and Russula exalbicans Fruiting Bodies

2009 ◽  
Vol 75 (7) ◽  
pp. 1979-1989 ◽  
Author(s):  
F. G. Hidde Boersma ◽  
Jan A. Warmink ◽  
Fernando A. Andreote ◽  
Jan Dirk van Elsas
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Bulk Soil ◽  
Fruiting Bodies ◽  
Community Structures ◽  
Specific Pcr ◽  
Laccaria Proxima ◽  
The Family ◽  
Gradient Gel Electrophoresis ◽  
Selection Of

ABSTRACT The dense hyphal network directly underneath the fruiting bodies of ectomycorrhizal fungi might exert strong influences on the bacterial community of soil. Such fruiting bodies might serve as hot spots for bacterial activity, for instance by providing nutrients and colonization sites in soil. Here, we assessed the putative selection of specific members of the Sphingomonadaceae family at the bases of the fruiting bodies of the ectomycorrhizal fungi Laccaria proxima and Russula exalbicans in comparison to the adjacent bulk soil. To do so, we used a previously designed Sphingomonadaceae-specific PCR-denaturing gradient gel electrophoresis (DGGE) system and complemented this with analyses of sequences from a Sphingomonadaceae-specific clone library. The analyses showed clear selective effects of the fruiting bodies of both fungi on the Sphingomonadaceae community structures. The effect was especially prevalent with R. exalbicans. Strikingly, similar fungi sampled approximately 100 m apart showed similar DGGE patterns, while corresponding bulk soil-derived patterns differed from each other. However, the mycospheres of L. proxima and R. exalbicans still revealed divergent community structures, indicating that different fungi select for different members of the Sphingomonadaceae family. Excision of specific bands from the DGGE patterns, as well as analyses of the clone libraries generated from both habitats, revealed fruiting body-specific Sphingomonadaceae types. It further showed that major groups from the mycospheres of R. exalbicans and L. proxima did not cluster with known bacteria from the database, indicating new groups within the family of Sphingomonadaceae present in these environments.

Selection of ectomycorrhizal fungi with resistance to Rhizoctonia solani

1990 ◽  
Vol 28 (1-4) ◽  
pp. 575-579 ◽  
Author(s):  
Zhao Zhi-peng ◽  
Kuo Shiu-chien ◽  
Bi Kuo-chang
Keyword(s):  
Rhizoctonia Solani ◽  
Ectomycorrhizal Fungi ◽  
Selection Of

scholarly journals Cohesiveness in microbial community coalescence

2018 ◽  
Author(s):  
Nanxi Lu ◽  
Alicia Sanchez-Gorostiaga ◽  
Mikhail Tikhonov ◽  
Alvaro Sanchez
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Empirical Work ◽  
Invasion Success ◽  
Community Members ◽  
Interacting Species ◽  
Resource Interactions ◽  
Different Origins ◽  
Microbial Community Assembly ◽  
Selection Of

AbstractMicrobial invasions exhibit many unique properties; notably, entire microbial communities often invade one another, a phenomenon known as community coalescence. In spite of the potential importance of this process for the dynamics and stability of microbiome assembly, our understanding of it is still very limited. Recent theoretical and empirical work has proposed that large microbial communities may exhibit an emergent cohesiveness, as a result of collective consumer-resource interactions and metabolic feedbacks between microbial growth and the environment. A fundamental prediction of this proposal is the presence of ecological co-selection during community coalescence, where the invasion success of a given taxon is determined by its community members. To establish the generality of this prediction in experimental microbiomes, we have performed over one hundred invasion and coalescence experiments with environmental communities of different origins that had spontaneously and stably assembled in two different synthetic aerobic environments. We show that the dominant species of the coalesced communities can both recruit their community members (top-down co-selection) and be recruited by them (bottom-up co-selection) into the coalesced communities. Our results provide direct evidence that collective invasions generically produce ecological co-selection of interacting species, emphasizing the importance of community-level interactions during microbial community assembly.

scholarly journals The selection of microbial communities by constant or fluctuating temperatures

1990 ◽  
Vol 74 (4) ◽  
pp. 243-252 ◽  
Author(s):  
A.C. Upton ◽  
D.B. Nedwell ◽  
D.D. Wynn-Williams
Keyword(s):  
Microbial Communities ◽  
Fluctuating Temperatures ◽  
Selection Of
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