Agrobacterium-plant cell DNA transport: have virulence proteins, will travel.

Agrobacterium-plant cell DNA transport: have virulence proteins, will travel. Department of Biochemistry and Cell Biology, lnstitute of Cell and Developmental Biology, State University of New York, Stony Brook, New York 11794-5215 INTRODUCTION Agrobacterium fumefaciens (Agrobacterium) is a soil phytopathogen that genetically transforms host cells, causing crown gall tumors, an agronomically important disease that affects most dicotyledonous plants. In nature, these tumors are formed at the soil-air junction, the so-called crown of the plant. The Agrobacterium-plant cell interaction is the only known natural example of DNA transport between kingdoms. In this process, DNA is transported from wild-type Agrobacterium into nucleus. Expressionof this transferred DNA (T-DNA) results in neoplastic growths (tumors) on the host plant. The wild-type T-DNA carries genes involved in the synthesis of plant growth hormones and the production of opines, tumor-specific compounds formed by the condensation of an amino acid with a keto acid or a sugar. It is the production of growth hormones in the transformed host cells that induces the formation of tumors. These tumors then synthesize opines, a major carbon and nitrogen source for Agrobacterium. Agrobacteria are usually classified based on the type of opines specified by the bacterial T-DNA, the most common strains being octopine or nopaline specific (Hooykaas and Beijersbergen, 1994). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Agrobacterium-plant cell DNA transport: have virulence proteins, will travel.

Oct 19, 1996

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Publisher
American Society of Plant Biologist
Copyright
Copyright © 1996 by the American Society of Plant Biologists
ISSN
1040-4651
eISSN
1532-298X
Publisher site
See Article on Publisher Site

Abstract

Department of Biochemistry and Cell Biology, lnstitute of Cell and Developmental Biology, State University of New York, Stony Brook, New York 11794-5215 INTRODUCTION Agrobacterium fumefaciens (Agrobacterium) is a soil phytopathogen that genetically transforms host cells, causing crown gall tumors, an agronomically important disease that affects most dicotyledonous plants. In nature, these tumors are formed at the soil-air junction, the so-called crown of the plant. The Agrobacterium-plant cell interaction is the only known natural example of DNA transport between kingdoms. In this process, DNA is transported from wild-type Agrobacterium into nucleus. Expressionof this transferred DNA (T-DNA) results in neoplastic growths (tumors) on the host plant. The wild-type T-DNA carries genes involved in the synthesis of plant growth hormones and the production of opines, tumor-specific compounds formed by the condensation of an amino acid with a keto acid or a sugar. It is the production of growth hormones in the transformed host cells that induces the formation of tumors. These tumors then synthesize opines, a major carbon and nitrogen source for Agrobacterium. Agrobacteria are usually classified based on the type of opines specified by the bacterial T-DNA, the most common strains being octopine or nopaline specific (Hooykaas and Beijersbergen, 1994).

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