Microbial Feedbacks
1.0K views | +0 today
Follow
Microbial Feedbacks
Response of microbial community to any biotic and abiotic variations.
Curated by Praveen Rahi
Your new post is loading...
Your new post is loading...
Scooped by Praveen Rahi
Scoop.it!

Differential contributions of ammonia oxidizers and nitrite oxidizers to ... - Nature.com

The ISME Journal: Multidisciplinary Journal of Microbial Ecology is the official Journal of the International Society for Microbial Ecology, publishing high-quality, original research papers, short communications, commentary articles and reviews in...
more...
No comment yet.
Rescooped by Praveen Rahi from Plant-Microbe Symbiosis
Scoop.it!

Different dynamics of genome content shuffling among host-specificity groups of the symbiotic actinobacterium Frankia

Different dynamics of genome content shuffling among host-specificity groups of the symbiotic actinobacterium Frankia | Microbial Feedbacks | Scoop.it
Background
Frankia is a genus of soil actinobacteria forming nitrogen-fixing root-nodule symbiotic relationships with non-leguminous woody plant species, collectively called actinorhizals, from eight dicotyledonous families. Frankia strains are classified into four host-specificity groups (HSGs), each of which exhibits a distinct host range. Genome sizes of representative strains of Alnus, Casuarina, and Elaeagnus HSGs are highly diverged and are positively correlated with the size of their host ranges.

Results
The content and size of 12 Frankia genomes were investigated by in silico comparative genome hybridization and pulsed-field gel electrophoresis, respectively. Data were collected from four query strains of each HSG and compared with those of reference strains possessing completely sequenced genomes. The degree of difference in genome content between query and reference strains varied depending on HSG. Elaeagnus query strains were missing the greatest number (22–32%) of genes compared with the corresponding reference genome; Casuarina query strains lacked the fewest (0–4%), with Alnus query strains intermediate (14–18%). In spite of the remarkable gene loss, genome sizes of Alnus and Elaeagnus query strains were larger than would be expected based on total length of the absent genes. In contrast, Casuarina query strains had smaller genomes than expected.

Conclusions
The positive correlation between genome size and host range held true across all investigated strains, supporting the hypothesis that size and genome content differences are responsible for observed diversity in host plants and host plant biogeography among Frankia strains. In addition, our results suggest that different dynamics of shuffling of genome content have contributed to these symbiotic and biogeographic adaptations. Elaeagnus strains, and to a lesser extent Alnus strains, have gained and lost many genes to adapt to a wide range of environments and host plants. Conversely, rather than acquiring new genes, Casuarina strains have discarded genes to reduce genome size, suggesting an evolutionary orientation towards existence as specialist symbionts.

Via Jean-Michel Ané
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Phylogeny of the Rhizobium–Allorhizobium–Agrobacterium clade supports the delineation of Neorhizobium gen. nov.

Praveen Rahi's insight:

Once again Rhizobium rhizogenes was considered to be the proper name for former Agrobacterium rhizogenes. 

more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Anaerobic microbes surprise scientists by living with oxygen - Phys.org

Anaerobic microbes surprise scientists by living with oxygen - Phys.org | Microbial Feedbacks | Scoop.it
A study into Shark Bay's microbial mats has detected activity of anaerobic microbes under oxic conditions—highlighting unknown complexities in microbial systems.
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Bruker Introduces Beta-Lactamase Testing, New Productivity Software Modules ... - SelectScience.net (press release)

Bruker Introduces Beta-Lactamase Testing, New Productivity Software Modules ... - SelectScience.net (press release) | Microbial Feedbacks | Scoop.it
Bruker Introduces Beta-Lactamase Testing, New Productivity Software Modules ...
more...
No comment yet.
Rescooped by Praveen Rahi from Plant-Microbe Symbiosis
Scoop.it!

Announcing rhizobial genomes

Announcing rhizobial genomes | Microbial Feedbacks | Scoop.it
In my last post, I highlighted the great job that Wayne Reeve has been doing in getting rhizobial genomes sequenced and published.   I listed 18 papers that he has published since the start of 2013 – each describing a genome. This is a very impressive effort! There may have been an incentive for this quick-fire rate of publication: the reports were all in a journal called Standards in Genomic Sciences(Impact Factor 2.0), which has recently been taken over by BMC, who are now imposing a hefty publication charge of £865 (about US$1450 or €1050) for each genome announcement.

Via Jean-Michel Ané
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Loss of microbial diversity in soils is coincident with reductions in some specialized functions - Singh - 2014 - Environmental Microbiology - Wiley Online Library

Loss of microbial diversity in soils is coincident with reductions in some specialized functions - Singh - 2014 - Environmental Microbiology - Wiley Online Library | Microbial Feedbacks | Scoop.it
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Non-target effects of bioinoculants on rhizospheric microbial communities of Cajanus cajan

Non-target effects of bioinoculants on rhizospheric microbial communities of Cajanus cajan | Microbial Feedbacks | Scoop.it
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Access : Symbiotic relationships between soil fungi and plants reduce N2O emissions from soil : The ISME Journal

The ISME Journal: Multidisciplinary Journal of Microbial Ecology is the official Journal of the International Society for Microbial Ecology, publishing high-quality, original research papers, short communications, commentary articles and reviews in...
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

PLOS ONE: Linking Plant Nutritional Status to Plant-Microbe Interactions

PLOS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Dust to Dust: a man-made Malthusian crisis - Telegraph

Dust to Dust: a man-made Malthusian crisis - Telegraph | Microbial Feedbacks | Scoop.it
We must wake up to the global land crisis or face a very real threat of famine
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Symbiosis and the social network of higher plants

Symbiosis and the social network of higher plants | Microbial Feedbacks | Scoop.it
Praveen Rahi's insight:

In the Internet era, communicating with friends and colleagues via social networks constitutes a significant proportion of our daily activities. Similarly animals and plants also interact with many organisms, some of which are pathogens and do no good for the plant, while others are beneficial symbionts. Almost all plants indulge in developing social networks with microbes, in particular with arbuscular mycorrhizal fungi, and emerging evidence indicates that most employ an ancient and widespread central ‘social media’ pathway made of signaling molecules within what is called the SYM pathway. Some plants, like legumes, are particularly active recruiters of friends, as they have established very sophisticated and beneficial interactions with nitrogen-fixing bacteria, also via the SYM pathway. Interestingly, many members of the Brassicaceae, including the model plant Arabidopsis thaliana, seem to have removed themselves from this ancestral social network and lost the ability to engage in mutually favorable interactions with arbuscular mycorrhizal fungi. Despite these generalizations, recent studies exploring the root microbiota of A. thalianahave found that in natural conditions, A. thaliana roots are colonized by many different bacterial species and therefore may be using different and probably more recent ‘social media’ for these interactions. In general, recent advances in the understanding of such molecular machinery required for plant–symbiont associations are being obtained using high throughput genomic profiling strategies including transcriptomics, proteomics and metabolomics. The crucial mechanistic understanding that such data reveal may provide the infrastructure for future efforts to genetically manipulate crop social networks for our own food and fiber needs.

more...
No comment yet.
Rescooped by Praveen Rahi from Fast and accurate identification - microbiology with MALDI-TOF biotyper
Scoop.it!

Comparison of MALDI-TOF mass spectra with microsatellite length polymorphisms in Candida albicans - Dhieb - 2015 - Journal of Mass Spectrometry - Wiley Online Library

Comparison of MALDI-TOF mass spectra with microsatellite length polymorphisms in Candida albicans - Dhieb - 2015 - Journal of Mass Spectrometry - Wiley Online Library | Microbial Feedbacks | Scoop.it

Via pvanhouts
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Curious case of Mesorhizobium loti type strain

Curious case of Mesorhizobium loti type strain | Microbial Feedbacks | Scoop.it
Bacterial identification requires a series of experiments to accurately designate the taxonomic affiliation of a strain. Sequencing of 16S rRNA gene has been considered as one of the most important...
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Incorporating Soil Microbes in Climate Change Models - Scientist

Incorporating Soil Microbes in Climate Change Models - Scientist | Microbial Feedbacks | Scoop.it
Incorporating Soil Microbes in Climate Change Models
Scientist
And he noted that the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report—from 2007—concluded that there was high uncertainty about the feedback from soil carbon.
Praveen Rahi's insight:

We need to rapidly understand more about microbial responses to climate change if we're to predict the strength of soil C [carbon] feedbacks to climate change

more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

The brave new world of DIY faecal transplant - BBC News

The brave new world of DIY faecal transplant - BBC News | Microbial Feedbacks | Scoop.it
BBC News
The brave new world of DIY faecal transplant
BBC News
Curtis says she has had plenty of people thanking her for her book, and so far, no feedback from disappointed patients, or criticism from doctors.
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Untangling whole genomes of individual species from a microbial mix

Untangling whole genomes of individual species from a microbial mix | Microbial Feedbacks | Scoop.it
A new approach to studying microbes in the wild will allow scientists to sequence the genomes of individual species from complex mixtures. It marks a big advance for understanding the enormous diversity of microbial ...
more...
No comment yet.
Rescooped by Praveen Rahi from MycorWeb Plant-Microbe Interactions
Scoop.it!

Plant–microbe interactions as drivers of ecosystem functions relevant for the biodegradation of organic contaminants

Plant–microbe interactions as drivers of ecosystem functions relevant for the biodegradation of organic contaminants | Microbial Feedbacks | Scoop.it

Highlights• Biotransformation is an ecosystem property.• Microbes are the main drivers in biotransformation.• Dispersal of chemicals and bacteria drives degradation effectiveness.• Ecosystem stability is increased by plant–microbe interactions


Via Francis Martin
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

The role of mycorrhizae and plant growth promoting rhizobacteria (PGPR) in improving crop productivity under stressful environments

The role of mycorrhizae and plant growth promoting rhizobacteria (PGPR) in improving crop productivity under stressful environments | Microbial Feedbacks | Scoop.it
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Frontiers | Multiple control levels of root system remodeling in arbuscular mycorrhizal symbiosis | Frontiers in Plant-Microbe Interaction

In nature the root systems of most plants develop intimate symbioses with Glomeromycotan fungi that assist in the acquisition of mineral nutrients and water through uptake from the soil and direct delivery into the root cortex.
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Microbial modulators of soil carbon storage: integrating genomic and metabolic knowledge for global prediction

Microbial modulators of soil carbon storage: integrating genomic and metabolic knowledge for global prediction | Microbial Feedbacks | Scoop.it
more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

BBC Radio 4 - Frontiers, Nitrogen Fixing

BBC Radio 4 - Frontiers, Nitrogen Fixing | Microbial Feedbacks | Scoop.it
Prof Andrea Sella looks at efforts to reduce our dependence on the Haber-Bosch process.
Praveen Rahi's insight:

Deram to make planet free of synthetic fertilizers.

more...
No comment yet.
Scooped by Praveen Rahi
Scoop.it!

Psychobiotics: Can Stomach Bacteria Change Your Brain?

Psychobiotics: Can Stomach Bacteria Change Your Brain? | Microbial Feedbacks | Scoop.it
Are psychobiotics the new anti-depressants? A new review article links probiotics to changes in mood and mental health, suggesting these "good" bacteria might have potential as a treatment for depression and other psychiatric maladies.
more...
No comment yet.