Stable nuclear transformation of Eudorina elegans.
1Department of Cellular and Developmental Biology of Plants, University of Bielefeld, Bielefeld, Germany.
BMC Biotechnology
|February 14, 2013
Summary
Stable nuclear transformation of Eudorina elegans is now routine, enabling genetic engineering without endogenous genes. This breakthrough allows for constitutive and inducible expression of heterologous genes in this model organism.
Area of Science:
- Evolutionary biology
- Molecular biology
- Algal genetics
Background:
- The transition to multicellularity is a key evolutionary event.
- Volvocine algae serve as a model system for studying multicellularity and differentiation.
- Eudorina elegans, an intermediate species, lacks established genetic engineering tools.
Purpose of the Study:
- To establish stable nuclear transformation in Eudorina elegans.
- To enable genetic manipulation for detailed molecular analyses.
- To facilitate the study of evolutionary aspects of multicellularity.
Main Methods:
- Particle bombardment for stable nuclear transformation.
- Use of chimeric selectable markers (aminoglycoside 3'-phosphotransferase VIII gene) and reporter genes (luciferase gene).
- Employing heterologous promoters from Volvox carteri, Chlamydomonas reinhardtii, and heat shock promoters.
Main Results:
- Achieved stable transformation of E. elegans with paromomycin resistance.
- Demonstrated high co-transformation rates (50-100%) for non-selectable plasmids.
- Showcased constitutive and inducible expression of the luciferase reporter gene using heterologous promoters, with significant activity increases.
Conclusions:
- Heterologous sequences, including promoters, are functional in E. elegans.
- Stable nuclear transformation of E. elegans is now a routine procedure.
- Genetic engineering is feasible in E. elegans without relying on endogenous genes or promoters.
