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28993C

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Image #   28993C
Name:   Agrobacterium tumefaciens - Gram-negative, rod prokaryote (bacterium)
Copyright:   Copyright 2008 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Agrobacterium tumefaciens - Gram-negative, plant pathogen, rod bacterium. Agrobacterium tumefaciens is an alphaproteobacteria from the family Rhizobiaceae and is known to cause tumors in plants. It causes crown gall disease (formation of tumors disease) in over 140 species of dicot plants. A. tumefaciens is a serious pathogen of grape vines, stone fruits, nut trees, sugar beets, horse radish and rhubarb. Agrobacterium spp. can transfer DNA between itself and plants and thus has become an important tool for genetic manipulation (genetic engineering). Most Agrobacterium spp. have plasmids that they can be inject into plant cells at wound sites. This plasmid DNA is designed to integrate into the chromosomes of the infected plant's cellular DNA. DNA transfer from Agrobacterium tumefaciens to eukaryotic plant cells is the only known example of interkingdom DNA transfer.
Magnification*: x3,000
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   07.01.08 28993C Agrobacterium bacteria bacterium crown gall disease genes soil bacteria soil bacterium soil microbe soil microbes soil microorganism soil microorganisms microbe microbes agrobacteria plant pathogen plant tumor plant tumors plant tumour plant tumours SEM rod prokaryote rod shaped rod-shaped bacillus bacilli gene vector gene transfer gene manipulation genetic manipulation genetic engineering gene enginering DNA transfer bacteria DNS transfer bacterial DNA transfer Rhizobiaceae plant disease Gram negative Gram-negative alphaproteobacterium alphaproteobacteria soil borne pathogen plasmid DNA crown gall gall disease proteobacterium protobacteria Agrobacterium tumefaciens dicot plant disease plant gall plant galls

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