Abstract
Crown gall is an uncontrolled proliferation of tumor cells incited by Agrobacterium tumefaciens on most dicotyledonous plants. To accomplish this, the bacterium transfers and integrates a portion (the T-region) of its tumor inducing (Ti) plasmid into plant nuclear DNA (1,2,3,4). The transferred DNA (T-DNA) is expressed in the transformed cell and encodes enzymes involved in the synthesis of amino acid condensation products called opines (5,6,7,8,9,10). This paper will report data which suggest that T-DNA alos encodes genes which specify the synthesis... also encode the synthesis of the phytohormones, Indole acetic acid, Isopentenyl adenosine, Isopentenyl adenosine 5 monophosphate, and Isopentenyl adenine.
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