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Green fluorescent protein (GFP) as a marker during pollen development
I Ottenschläger1, I Barinova, V Voronin
1Vienna Biocenter, Institute of Microbiology & Genetics, Vienna University, Austria.
Transgenic Research
|January 6, 2000
Summary
Green fluorescent protein (GFP) can be used as a non-destructive marker in plant reproductive biology. Studies show GFP expression in pollen is not toxic and allows for functional development and germination.
Area of Science:
- Plant molecular biology
- Genetics
- Developmental biology
Background:
- Green fluorescent protein (GFP) is a widely used reporter gene.
- Understanding its utility in plant reproductive biology requires evaluating its expression and effects on pollen.
Purpose of the Study:
- To assess the transient and stable expression of three GFP mutant forms in pollen of tobacco, Arabidopsis, and snapdragon.
- To determine if GFP expression impacts pollen development, function, and reproductive success.
Main Methods:
- Bombardment of immature pollen with GFP constructs under various promoters.
- In vitro culture and monitoring of pollen maturation, germination, and pollination.
- Comparison with beta-glucuronidase (GUS) reporter gene expression.
- Generation of stably transformed tobacco plants.
Main Results:
- GFP expression levels correlated with promoter strength, with DC3 being the strongest.
- No significant differences in intensity or brightness among GFP variants were observed.
- GFP-expressing pollen matured, germinated in vitro and in situ, and stably transformed plants showed normal reproductive function.
- GFP was confirmed as non-toxic to pollen development and function.
Conclusions:
- The three GFP mutant forms are suitable for transient and stable expression in plant pollen.
- GFP serves as a non-toxic, effective marker for studying plant reproductive biology and development.
- Promoter choice is critical for optimizing GFP expression levels in pollen.