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Agrobacterium is a plant pathogen which causes the “crown-gall” disease, a neoplastic growth that results from the transfer of a well-defined DNA segment (“transferred DNA”, or “T-DNA”) from the bacterial Ti (tumor-inducing) plasmid to the host cell, its integration into the host genome, and the expression of oncogenes contained on the T-DNA. The molecular machinery, needed for T-DNA generation and transport into the host cell and encoded by a series of chromosomal (chv) and Ti-plasmid virulence (vir) genes, has been the subject of numerous studies over the past several decades. Today, Agrobacterium is the tool of choice for plant genetic engineering with an ever expanding host range that includes many commercially important crops, flowers, and tree species. Furthermore, its recent application for the genetic transformation of non-plant species, from yeast to cultivated mushrooms and even to human cells, promises this bacterium a unique place in the future of biotechnological applications. The book is a comprehensive volume describing Agrobacterium's biology, interactions with host species, and uses for genetic engineering.
This volume reviews various facets of Agrobacterium biology, from modern aspects of taxonomy and bacterial ecology to pathogenesis, bacterial cell biology, plant and fungal transformation, natural transgenics, and biotechnology. Agrobacterium-mediated transformation is the most extensively utilized platform for generating transgenic plants, but modern biotechnology applications derive from more than 40 years of intensive basic scientific research. Many of the biological principles established by this research have served as models for other bacteria, including human and animal pathogens. Written by leading experts and highlighting recent advances, this volume serves both as an introduction to Agrobacterium biology for students as well as a more comprehensive text for research scientists.
In Volume 34, covering May through July 1801, the story of Thomas Jefferson's first presidential administration continues to unfold. He quickly begins to implement his objectives of economy and efficiency in government. Requesting the chief clerk of the War Department to prepare a list of commissioned army officers, Jefferson has his secretary Meriwether Lewis label the names on the list with such descriptors as "Republican" or "Opposed to the administration, otherwise respectable officers." The president calls his moves toward a reduction in the army a "chaste reformation." Samuel Smith, interim head of the Navy Department, in accordance with the Peace Establishment Act, arranges for the sa...
George W. Bush and Al Gore were by no means the first presidential hopefuls to find themselves embroiled in a hotly contested electoral impasse. Two hundred years earlier, Thomas Jefferson and John Adams endured arguably the most controversial and consequential election in American history. Focusing on the wide range of possible outcomes of the 1800-1801 melee, this collection of essays situates the American "Revolution of 1800" in a broad context of geo-political and racial developments in the Atlantic world as a whole. In essays written expressly for this volume, leading historians of the period examine the electoral, social, and political outcome of Jefferson's election in discussions str...
A presidential hopeful has taken a beautiful, vulnerable woman as his mistress, though both are married to others. His rival for the presidency of the United States has even more sensational secrets to guard about his own past. An ambitious journalist unearths the stories of the private lives of both, and he hefts in his hand what he calls "the hammer of truth." The time is the end of the eighteenth century. The political figures whose intimate lives are about to be revealed are Alexander Hamilton and Thomas Jefferson. The journalist out to shape the course of the young nation's history is "that scurrilous scoundrel Callender," the fugitive from Scottish sedition law who pioneered the public...
This work details the advances in transgenic plant construction and explores the social, political, and legal aspects of genetic plant manipulation.
More than 270 scientists from 33 countries attended the 6th International Conference on Plant Pathogenic Bacteria in College Park, Maryland, June 2-7, 1985. The Conference was jOintly sponsored by the International Society of Plant Pathology, Bacteria Section and by the United States Department of Agriculture, Agriculture Research Service. The Conference provided an opportunity for the presentation and discussion of recent developments in phytobacteriology. The Conference was organized into five symposia, seven discussion sessions, contributed papers and poster presentations. More than 230 contributions were presented under the following topics: ice nucleating bacteria; detection, identifica...
For investigators engaged in the study of toxins generally, and host-specific toxins in particular, it is a rare treat to attend a meeting in which toxins involved in plant pathogenesis are emphasized. A gathering of this type provides opportunity to consider the discovery of new toxins, their chemical structures, genes encoding enzymes that control their biosyntheses, their sites of action and physiological effects on plants, and their roles (if any) in pathological processes. Having acknowledged the inspiration fostered by a 'toxin meeting', however, it is important to point out that the program of this symposium was generously sprinkled with 'nontoxin' talks. These contributions generated...