Abstract
The phenomenon tumor formation on plants has intrigued biologists for a long time. More than 75 years ago, it was reported that a particular type of plant tumor, known as crown gall, was caused by bacteria (Smith and Townsend, 1907). The present taxonomic name of this soil bacterium is Agrobacterium tumefaciens. Crown gall is characterized by unlimited cell proliferations, which may lead to regression or even to death of the plant. The disease and its causative agent have been studied intensively, first to uncover concepts underlying the tumorous state, secondly because it is the cause of losses of economically important plants in Europe (Kerr and Panagopoulos, 1977), North-America (Kennedy and Alcorn, 1980), and Australia (New and Kerr, 1972), and thirdly, more recently, to develop plant gene vectors.
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References
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Hille, J., Hoekema, A., Hooykaas, P., Schilperoort, R. (1984). Gene Organization of the Ti-Plasmid. In: Verma, D.P.S., Hohn, T. (eds) Genes Involved in Microbe-Plant Interactions. Plant Gene Research. Springer, Vienna. https://doi.org/10.1007/978-3-7091-8739-5_11
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