The expression cassettes were subcloned into the
plant transformation vector pBI 121 (Clontech) at the
unique HindIII site, between the 35S/uidA/nos and
nos/nptII/nos cassettes, generating pBI T305 and pBI
T317. These plasmids were transferred to Agrobacterium
tumefaciens strain EHA 105 by electroporation.
Transgenic Mexican lime plants were obtained by
Agrobacterium-mediated transformation of internodal
stem segments from 6 to 12-month-old greenhousegrown
plants, as described in Domínguez et al. (Deng
et al. 2000).