Cytochrome P450 in Petunia Petal Senescence
Author Information
Author(s): Xu Yan, Ishida Hiroyuki, Reisen Daniel, Hanson Maureen R
Primary Institution: Cornell University
Hypothesis
The study investigates the role of a cytochrome P450 enzyme in petal senescence in Petunia inflata.
Conclusion
The identification of a CYP74C family member as a highly upregulated gene during petal senescence suggests that additional products of fatty acid metabolism may play important roles during programmed cell death.
Supporting Evidence
- The CYP74C9 gene was found to be 40 times more abundant in flowers 36 hours after pollination.
- Ethylene and jasmonate treatments resulted in increased expression of the CYP74C9 gene.
- The protein was localized in the tonoplast, suggesting a role in programmed cell death.
Takeaway
When petunia flowers start to wilt after pollination, a special protein called CYP74C9 becomes much more active, which might help the flower die in a controlled way.
Methodology
Differential display of cDNAs was performed to identify genes upregulated during petal senescence, followed by cloning and analysis of the CYP74C9 gene.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website