Related Experiment Video
Updated: Jun 1, 2026
07:26
Discrimintion and Mapping of the Primary and Processed Transcripts in Maize Mitochondrion Using a Circular RT-PCR-based Strategy
Published on: July 29, 2019
Transcriptomic and proteomic profiling of maize embryos exposed to camptothecin
Nuria Sánchez-Pons1, Sami Irar, Nora García-Muniz
1Department of Molecular Genetics, Centre for Research in Agricultural Genomics, Campus UAB, Edifici CRAG, Bellaterra (Cerdanyola del Vallés), 08193 Barcelona, Spain.
BMC Plant Biology
|May 21, 2011
Summary
Camptothecin, a plant alkaloid, triggers DNA damage responses in maize by altering gene expression related to DNA repair and cell division. This research identifies key genes and proteins involved in plant stress and DNA injury resistance.
Area of Science:
- Plant molecular biology
- Genomics and proteomics
- DNA damage response
Background:
- Camptothecin is a plant alkaloid that inhibits topoisomerase I.
- This inhibition leads to DNA double-strand breaks and activates cellular responses to DNA damage.
- Severe camptothecin treatment can induce programmed cell death.
Purpose of the Study:
- To investigate the molecular response of maize embryos to camptothecin exposure.
- To identify genes and proteins involved in plant DNA damage response pathways.
- To explore potential targets for improving plant resistance to DNA injury.
Main Methods:
- Comparative transcriptomic and proteomic analyses were performed on maize embryos.
- Gene expression and protein accumulation were analyzed after camptothecin treatment.
- Enzyme activity, specifically calcium-dependent nucleases, was assessed.
Main Results:
- Camptothecin induced transcription of DNA repair genes and repressed cell division genes in maize embryos.
- Genomic DNA degradation was minimal under the experimental conditions.
- Changes were observed in proteins related to stress response and post-translational modifications.
- Activity of calcium-dependent nucleases was induced.
Conclusions:
- Several genes and proteins participating in plant DNA damage responses were identified.
- Some identified components may be involved in general stress responses, while others are candidates for specific DNA repair functions.
- The findings provide new avenues for research into enhancing plant resistance to DNA damage.
