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Signalling cascades choreographing petal cell death: implications for postharvest quality.
Sumira Farooq1, Mohammad Lateef Lone1, Aehsan Ul Haq1
1Plant Physiology and Biochemistry Research Laboratory, Department of Botany, University of Kashmir, Srinagar, 190006, India.
Plant Molecular Biology
|May 28, 2024
Summary
Flower senescence involves complex molecular pathways. Understanding these, particularly ethylene signalling, is key to delaying petal senescence and improving cut flower longevity and quality.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- Senescence is a critical, dynamic developmental phase in plants, involving structural, biochemical, and molecular changes.
- Flower senescence significantly impacts plant lifecycle, ornamental value, and postharvest quality.
- Key biochemical changes include reactive oxygen species (ROS) generation, membrane and nucleic acid degradation, and protein breakdown.
Purpose of the Study:
- To elucidate the intricate signalling pathways regulating petal senescence in flowering plants.
- To explore strategies for enhancing postharvest longevity of cut flowers by understanding senescence mechanisms.
- To bridge fundamental research on senescence with practical applications for ornamental horticulture.
Main Methods:
- Review of existing literature on plant senescence signalling pathways.
- Analysis of molecular and biochemical alterations during flower senescence.
- Focus on hormone, calcium, protein kinase, and ROS signalling pathways, with emphasis on ethylene signalling.
Main Results:
- Petal senescence is orchestrated by a complex network of interconnected molecular mechanisms and signalling pathways.
- Ethylene signalling pathway is a major player, with gene manipulation showing potential for extending flower longevity.
- Multiple pathways, including hormone, calcium, protein kinase, and ROS signalling, contribute to senescence.
Conclusions:
- Understanding petal senescence signalling is crucial for improving postharvest quality and ornamental value of cut flowers.
- Targeted modulation of these pathways, especially ethylene signalling, offers potential for delaying senescence.
- This review provides insights into pivotal signalling cascades and potential strategies for postponing petal senescence in ornamental plants.
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