Targeted expression of U1-70K antisense transcript using the
AP3 promoter. A, Schematic diagram of U1-70K antisense
cassette used to generate transgenic plants. AP3, Promoter (700 bp) from
AP3 gene; U1-70K antisense, U1-70K long cDNA in
antisense orientation; Term, NOS3 terminator. B, Expression of U1-70K antisense transcript results in flowers with rudimentary petals and stamens.
Left, Inflorescence of a wild-type plant (top) and wild-type flower. Right,
Inflorescence of a transgenic plant expressing U1-70K antisense
transcript (top) and flower from a transgenic plant with rudimentary petals
and stamens (bottom).