Navigation Links
UT-ORNL research reveals aquatic bacteria more recent move to land

Research by University of Tennessee, Knoxville, faculty has discovered that bacteria's move from sea to land may have occurred much later than thought. It also has revealed that the bacteria may be especially useful in bioenergy research.

Igor Jouline, UT-Oak Ridge National Laboratory joint faculty professor of microbiology and researcher at ORNL's Joint Institute for Computational Sciences, performed a genome sequence analysis of the soil bacteria Azospirillum, a species' whose forbearers made the sea-to-land move. The analysis indicates the shift may have occurred only 400 million years ago, rather than approximately two billion years earlier as originally thought.

Published in the journal PLoS Genetics, Jouline calculated the timing of the sea-land transition through studies of genome sequences of two species of Azospirillum, a terrestrial genus with almost exclusively aquatic relatives.

Jouline conducted his research with Kristin Wuichet and Leonid Sukharnikov of the Department of Microbiology, Gladys Alexandre of Department of Biochemistry, Cellular, and Molecular Biology, and Kirill Borziak, a graduate student in the ORNL-UT Genome Science and Technology program.

"In the absence of fossil records for bacteria, it is hard to estimate when and how bacteria transitioned from sea to land," said Jouline. "Using genome sequencing and analysis of bacteria of the genus Azospirillum, which colonizes roots of important cereals and grasses, we show that these organisms transitioned from aquatic environments to land approximately at the same time that plants appeared on land400 million years ago."

Jouline said the Azospirillum lineage the team studied has obtained nearly half of its genome from terrestrial organisms, which suggests the much later water-land transition, which coincides with the first appearance of plants on land.

The study is of interest to researchers beyond its evolutionary significance. Azospirillum is currently used as a biofertilizer for grasses and some other plants. Commercial fertilizers containing the bacteria are available worldwide.

"Because these bacteria colonize roots of grasses and improve their growth and development, they might be important for bioenergy research," Jouline said.

"Switchgrass is one of the most important potential sources of bioethanol. In this study, we have shown that genomes of Azospirillum contain as many cellulolytic enzymes as those from known effective cellulose degrading bacteria," he said. "We have also demonstrated experimentally that azospirilla do degrade cellulose, especially the strain that can penetrate grass roots."


Contact: Whitney Heins
University of Tennessee at Knoxville

Related biology news :

1. Wistar Institute researcher receives New Innovator award from NIH
2. NC State researchers get to root of parasite genome
3. White Mountain Research Station to host climate change conference
4. Stevens awarded $1M for advanced biofuels research
5. Researchers find animal with ability to survive climate change
6. Researchers find an essential gene for forming ears of corn
7. Researchers note differences between people and animals on calorie restriction
8. Researcher working on destruction of chemical weapons
9. Researchers study acoustic communication in deep-sea fish
10. Researchers discover that growing up too fast may mean dying young in honey bees
11. The Rett Syndrome Research Trust launches operations
Post Your Comments:
(Date:11/26/2015)... -- Research and Markets ( ) has announced ... Technology and Patent Infringement Risk Analysis" report to ... --> Fingerprint sensors using capacitive technology represent a ... vendor Idex forecasts an increase of 360% of the ... of the fingerprint sensor market between 2014 and 2017 ...
(Date:11/18/2015)... 2015  As new scientific discoveries deepen our understanding ... healthcare providers face challenges in better using that knowledge ... addition, as more children continue to survive pediatric cancer, ... old age. John M. Maris, M.D ., ... Philadelphia (CHOP) . --> John M. ...
(Date:11/17/2015)... -- Vigilant Solutions announces today that Mr. Dick W. ... --> --> Mr. Boyce ... at TPG Capital, one of the largest global investment ... revenue.  He founded and led TPG,s Operating Group, which ... 1997 to 2013.  In his first role, he served ...
Breaking Biology News(10 mins):
(Date:11/30/2015)... 30, 2015  Champions Oncology, Inc. (CSBR), engaged in ... personalize the development and use of oncology drugs, today ... will be presenting at the LD MICRO Investor Conference ... Time (PST).  The conference, held at the Luxe Sunset ... , will feature 200 small/micro-cap companies and is ...
(Date:11/30/2015)... JACKSONVILLE, Florida , November 30, 2015 ... company specializing in the development of innovative peptide and ... & metastatic disease, today announced it will be presenting ... Event on December 1, 2015 at 2.30 PM PT. ... member and Strategic Advisor will be giving the presentation ...
(Date:11/30/2015)... -- Aytu BioScience, Inc. (OTCQB: AYTU), a commercial-stage specialty healthcare ... at two upcoming investor conferences. Aytu is scheduled to ... to be held December 3, 2015, and at LD ... 2 nd & 3 rd , 2015 in ... via webcast. Josh Disbrow , Chief Executive ...
(Date:11/30/2015)... Florida and MAGDEBURG, Germany , ... of NeuroRehabilitation (ECNR) in Vienna, Austria ... 3rd European Congress of NeuroRehabilitation (ECNR) in ... --> NovaVision, a wholly owned subsidiary of Vycor ... European version of its Internet-delivered NovaVision Therapy Suite at the ...
Breaking Biology Technology: