Figure 1. Basic steps in transformation
of plant cells by Agrobacterium tumefaciens. The T-DNA transfer is
represented according to updated knowledge on this process, although many
of involved mechanisms have not been elucidated yet and the experimental
results only allow hypothesise about it. Entering of T-DNA complex into
the plant cell is almost completely uncharacterised and experimentally only
the VirB7-VirB9 disulphide bound heterodimmers have been evidenced.
The most important events are briefly mentioned in chronological order (boxes
1 through 13). Each step is described in the text.
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