Figure 3From: Stable nuclear transformation of Gonium pectoraleAnalysis of paromomycin resistance in wild type and transgenic G. pectorale strains. (A) After particle bombardment, treated organisms were distributed in Erlenmeyer flasks, aerated, and illuminated in a dark/light cycle. Paromomycin (1 μg/ml) was added after 48 h. (B) Appearance 12 days after particle bombardment exemplified by five flasks. (C) and (D): For detailed analysis of resistance, identical quantities of cells were incubated with increasing concentrations of paromomycin for eight days. (C) Analysis of wild type G. pectorale (upper row: 0–10 μg; lower row: 0–0.5 μg paromomycin/ml). (D) Analysis of transgenic strains (0–10 μg paromomycin/ml). (D1) Strains transformed with the selectable marker plasmids paphG (T-G...) or pPmr3 (T-J...). (D2) Strains co-transformed with the selectable marker plasmid pPmr3 along with the non-selectable plasmids ptubar4 (T-J...), pPsaD-GLuc (T-PL...), or pHsp70A-GLuc (T-HL...). (B-D) plus sign (+), flasks/vials with paromomycin-resistant green organisms; minus sign (-), cleared flasks/vials with some white remains of dead organisms.Back to article page