Abstract
The effects have been investigated of various combinations of rol genes, together with Ri plasmid TR-DNA transcripts 1 and 2, upon free IAA levels in transformed roots of Solanum dulcamara L. Differences between the IAA levels were observed, including a highly significant (p=0.01) difference between the IAA levels of rol− TR+ and rol ABC+ TR+ transformed roots. Possible mechanisms are discussed for the regulation of free IAA levels by rol gene products.
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