2.2 Genetic transformation
Genetic transformation was conducted by using A. tumefaciens which already cloned with pCAMBIA 1303
plasmid. Inside pCAMBIA 1303, a repoter gene called gus gene with CAMV35s promoter has already inserted in
order to detect J. curcas genotype Jatromas explants susceptibility.
A. tumefaciens containing pCAMBIA 1303 were grown in LA liquid medium on room temperature overnight
with 200 rpm agitation. For transformation, the culture was pelleted and its optical density was adjusted to 0.4-0.5
with modified liquid MS medium. The explants then soaked in MS medium containing A. tumefaciens for 20
minutes. The explants were co-cultivated on modified MS medium for three days. Decontamination was done by
soaking transformed explants in liquid MS containing 100 mg l-1 timentin and 0.2% plant preservative mixture with
agitation. The explants then rinsed three times with sterilized water and will be regenerated to new plantlet by using
tissue culture technique.