Featured Research

from universities, journals, and other organizations

Researchers discover the smallest aquatic bacterium ever described

Date:
September 23, 2013
Source:
Asociación RUVID
Summary:
Researchers have discovered the smallest aquatic bacterium ever described worldwide.

Researchers at the Cavanilles Institute of Biodiversity and Evolutionary Biology led by Professor Antonio Camacho and working in collaboration with the group of Professor Rodríguez-Valera, from Miguel Hernández University, have discovered the smallest aquatic bacterium heretofore described worldwide.

Related Articles


The research results, published recently in the journal Nature Scientific Reports, are important both for the discovery of a whole new group of bacteria with different genetic characteristics, and the possible ecological significance of this group of bacteria called for the time, 'Candidatus Actinomarinidae', since "are associated with the highest production of the oceans, recorded at depths around 50 meters between spring and autumn," said Camacho.

Researchers have studied the so-called DCM-Deep Chlorophyll Maximum in several areas of the planet and, more in detail, in the Mediterranean Sea, and they have described, with massive sequencing techniques, all inhabiting microbiota in such areas of the seas and oceans. These techniques "allow shelling whole microbial diversity of an ecosystem -millions of gene sequences that identify all the organisms that live there are obtained-, and to identify key genes that may explain the ecological role of microorganisms in the ecosystem; results which are later compared with environmental data taken in the study and allow for more detail on the functioning of biogeochemical cycles, "explains Camacho, who recalls that considering that microorganisms accumulate more than 90% of the biomass of the oceans" the importance of deepening in their knowledge is clear. "

Molecular analysis techniques have allowed more specifically characterize this new group of bacteria and, combined with other sophisticated analysis and microscopic techniques such as cell-situ hybridisation and flow cytometry, to determine that these are "smallest free-living microorganisms described so far, not only in terms of cell measure, but also with respect to the size of its genome, which is quite close to the theoretical limits on the minimum size of a living being independent, "said Antonio Camacho.

A record size

With biovolumes from 0'006 to 0'024 μm3 (average of 0'013 μm) and an average diameter of 0'292 μm, these bacteria are considerably smaller than the free-living organism which held that record up to now, Pelagibacter ubico, a marine bacterium also with a range of biovolume between 0'019 and 0'039 μm, nearly double that Candidatus Actinomarina minuta. Compared with commonly known bacterium, Escherichia cuele, the bacteria described in this paper has a size approximately 150 times lower.

The collaboration between these two research groups from Valencian universities, the University of Valencia and the University Miguel Hernandez, who bring together their expertise in genomics and microbial ecology, has made it possible to move forward together in the knowledge of microbial diversity in aquatic ecosystems. A few months ago provided new data on the Albufera of Valencia and the Mar Menor and in this case, key details of these marine areas of great importance from the point of view of the functioning of the oceans. The aforementioned collaboration continues in the search for explanatory mechanisms of microbial biodiversity patterns on aquatic ecosystems and knowing microbial metabolisms that dominate in these environments, which are crucial to the functioning of biogeochemical cycles at regional and planetary scale.

The research team of Professor Antonio Camacho, belonging to the Cavanilles Institute of Biodiversity and Evolutionary Biology of the University of Valencia, has accumulated experience of decades in the study of ecological patterns that govern the functioning of aquatic ecosystems as well as the biodiversity that they contain.


Story Source:

The above story is based on materials provided by Asociación RUVID. Note: Materials may be edited for content and length.


Journal Reference:

  1. Rohit Ghai, Carolina Megumi Mizuno, Antonio Picazo, Antonio Camacho, Francisco Rodriguez-Valera. Metagenomics uncovers a new group of low GC and ultra-small marine Actinobacteria. Scientific Reports, 2013; 3 DOI: 10.1038/srep02471

Cite This Page:

Asociación RUVID. "Researchers discover the smallest aquatic bacterium ever described." ScienceDaily. ScienceDaily, 23 September 2013. <www.sciencedaily.com/releases/2013/09/130923092943.htm>.
Asociación RUVID. (2013, September 23). Researchers discover the smallest aquatic bacterium ever described. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2013/09/130923092943.htm
Asociación RUVID. "Researchers discover the smallest aquatic bacterium ever described." ScienceDaily. www.sciencedaily.com/releases/2013/09/130923092943.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) — In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Reuters - Light News Video Online (Dec. 19, 2014) — Millions of monarch butterflies begin to descend onto Mexico as part of their annual migration south. Rough Cut (no reporter narration) Video provided by Reuters
Powered by NewsLook.com
The Best Protein-Filled Foods to Energize You for the New Year

The Best Protein-Filled Foods to Energize You for the New Year

Buzz60 (Dec. 19, 2014) — The new year is coming and nothing will energize you more for 2015 than protein-filled foods. Fitness and nutrition expert John Basedow (@JohnBasedow) gives his favorite high protein foods that will help you build muscle, lose fat and have endless energy. Video provided by Buzz60
Powered by NewsLook.com
Birds Might Be Better Meteorologists Than Us

Birds Might Be Better Meteorologists Than Us

Newsy (Dec. 19, 2014) — A new study suggests a certain type of bird was able to sense a tornado outbreak that moved through the U.S. a day before it hit. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins