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Latest Agrobacterium tumefaciens Stories

2012-07-11 14:34:21

Next week's Journal of Biological Chemistry "Paper of the Week" by Wai Mun Huang and colleagues at the University of Utah Health Sciences Center and the University of Minnesota reveals new insights into the molecular properties of the rod-shaped soil bacterium Agrobacterium tumefaciens, the pathogen responsible for crown gall disease, a tumor-forming infection in plants, such as tomatoes, walnuts, grapes and beets. The bacterium is parasitic: It infects its plant host by entering through...

2012-05-10 13:55:04

Journal of Biological Chemistry: Mechanism of bacterial transport system published In order to interact with the environment, bacteria secrete a whole arsenal of proteins. Researchers have now found how one of the transportation systems used for this purpose — the type VI secretion system — works for the single-celled organism Agrobacterium tumefaciens. They have identified the relevant transport proteins and their energy suppliers. With colleagues at the Academia Sinica in...

2012-02-01 20:49:13

Studying self-replicating genetic units, called plasmids, found in one of the world's widest-ranging pathogenic soil bacteria -- the crown-gall-disease-causing microorganism Agrobacterium tumefaciens -- Indiana University biologists are showing how freeloading, mutant derivatives of these plasmids benefit while the virulent, disease-causing plasmids do the heavy-lifting of initiating infection in plant hosts. The research confirms that the ability of bacteria to cause disease comes at a...

2011-12-01 11:29:07

Understanding mechanism may aid in development of infection-fighting drugs In the human world of manufacturing, many companies are now applying an on-demand, just-in-time strategy to conserve resources, reduce costs and promote production of goods precisely when and where they are most needed. A recent study from Indiana University Bloomington scientists reveals that bacteria have evolved a similar just-in-time strategy to constrain production of an extremely sticky cement to exactly the...

2009-03-27 14:39:41

Researchers have unveiled the evolutionary origin of the different chromosomal architectures found in three species of Agrobacterium. A comprehensive comparison of the Agrobacterium sequence information with the genome sequences of other bacteria suggests a general model for how second chromosomes are formed in bacteria.* Agrobacteria are members of the Rhizobiaceae family, which also includes the benign, nitrogen-fixing organisms Rhizobium and Sinorhizobium. Agrobacterium tumefaciens C58 is...

2008-09-30 03:00:24

By Burke, John J O'Mahony, Patrick J; Oliver, Melvin J; Velten, Jeff Abstract Transgenic cells containing inserted antibiotic resistance genes and linked genes of interest are routinely selected by exposure to antibiotics. Concerns over the widespread use of antibiotic resistance genes as selectable markers for genetic transformation have motivated researchers to find alternative selection procedures. This study describes the evaluation of an alternative protocol using temperature as the...

2008-09-12 03:00:21

By Choi, Hyong Woo Lee, Byung Gil; Kim, Nak Hyun; Park, Yong; Lim, Chae Woo; Song, Hyun Kyu; Hwang, Byung Kook Plants elaborate a vast array of enzymes that synthesize defensive secondary metabolites in response to pathogen attack. Here, we isolated the pathogen-responsive CaMNR1 [menthone: (1)- (3S)-neomenthol reductase] gene, a member of the short-chain dehydrogenase/reductase (SDR) superfamily, from pepper (Capsicum annuum) plants. Gas chromatography-mass spectrometry analysis revealed...

2008-08-17 18:00:39

By Dan, Yinghui Abstract Browning and necrosis of transformed cells/ tissues, and difficulty to regenerate transgenic plants from the transformed cells/tissues (recalcitrance) are common in Agrobacterium-mediated transformation process in many plant species. In addition, most crop transformation methods that use NPTII selection produce a significant number of nontransgenic shoots, called "shoot escapes" even under stringent selection conditions. These common problems of plant...


Latest Agrobacterium tumefaciens Reference Libraries

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2011-04-14 14:17:06

Agrobacterium tumefaciens is the causal agent of crown gall disease (the formation of tumours) in over 140 species of dicot. It is rod shaped. Symptoms are caused by the insertion of a small segment of DNA into the plant cell. It is an alphaproteobacterium of the family Rhizobiaceae which includes the nitrogen fixing legume symbionts. They are pathogenic and provide no benefit to the plant. It also affects a wide variety of plants. In an economical sense it affects walnuts, grape vines,...

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call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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