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Physiological and molecular mechanisms associated with potato tuber dormancy
Munevver Dogramaci1, Emily P Dobry2, Evandro A Fortini1,3
1Edward T. Schafer Agricultural Research Center, USDA-Agricultural Research Service, Fargo, ND 58102, USA.
Journal of Experimental Botany
|April 23, 2024
Summary
Potato tuber dormancy is complex, influenced by genetics and environment. Sprout suppressors affect gene expression for sprout growth, not dormancy duration.
Area of Science:
- Plant Physiology
- Molecular Biology
- Genetics
Background:
- Potato tuber dormancy is a critical trait affecting storage and quality.
- Dormancy regulation involves intricate genetic and environmental interactions.
- Understanding dormancy mechanisms is vital for potato breeding and industry.
Purpose of the Study:
- To review current knowledge on potato tuber dormancy diversity in wild relatives.
- To discuss the roles of genetic and epigenetic factors in tuber dormancy.
- To explore physiological mechanisms regulating dormancy, including apical dominance, phytohormone metabolism, and oxidative stress.
Main Methods:
- Literature review synthesizing existing research on potato tuber dormancy.
- Analysis of genetic and epigenetic contributions to dormancy traits.
- Examination of physiological pathways and molecular mechanisms involved.
Main Results:
- Significant gene expression changes in cell cycle, phytohormone metabolism, and oxidative stress response influence dormancy stages.
- Wild potato relatives exhibit diverse tuber dormancy traits.
- Commercial sprout suppressors primarily impact cell cycle and stress response genes, suppressing sprout growth rather than extending dormancy.
Conclusions:
- Tuber dormancy is a complex trait regulated by multiple genetic and physiological factors.
- Sprout suppressors offer a method to manage sprout growth but do not fundamentally alter tuber dormancy.
- Further research into genetic diversity and molecular mechanisms can inform potato breeding for improved storage.
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