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Epigenetic reprogramming in plant reproductive lineages.
Jose F Gutierrez-Marcos1, Hugh G Dickinson
1School of Life Sciences, University of Warwick, Wellesbourne Campus, Coventry CV35 9EF, UK. j.f.gutierrez-marcos@warwick.ac.uk
Plant & Cell Physiology
|April 17, 2012
Summary
Epigenetic regulation shapes plant gamete development and function during sexual reproduction. New technologies reveal how DNA methylation and small RNAs create unique epigenetic landscapes in male and female gametes, impacting fertilization outcomes.
Area of Science:
- Plant reproductive biology
- Epigenetics
- Molecular genetics
Background:
- Flowering plants utilize double fertilization involving male (pollen) and female (embryo sac) gametes.
- While gamete formation is understood, the role of epigenetics in shaping these reproductive events remains largely unknown.
- Inaccessibility of gametes, particularly female gametes within sporophyte tissues, has historically limited epigenetic studies.
Purpose of the Study:
- To review current evidence on the epigenetic regulation of plant gamete development and function.
- To highlight the role of small interfering RNAs and DNA methylation in establishing gamete-specific epigenetic landscapes.
- To explore how these epigenetic differences influence gamete fate and function during fertilization.
Main Methods:
- Review of recent epigenomic studies utilizing advanced cellular isolation and next-generation sequencing.
- Analysis of data on DNA methylation patterns and small interfering RNA profiles in plant gametes.
- Integration of findings to understand epigenetic mechanisms in plant sexual reproduction.
Main Results:
- Emerging evidence indicates intricate epigenetic regulation during the formation of male and female reproductive lineages.
- Small interfering RNAs and DNA methylation machinery are key players in setting up distinct epigenetic landscapes in gametes.
- These unique epigenetic profiles are likely responsible for the differential fates and functions of male and female gametes.
Conclusions:
- Epigenetic regulation is crucial for the developmental fate and function of plant gametes.
- The study of 'epigametes' offers insights into unresolved questions in flowering plant sexual reproduction.
- Understanding these epigenetic mechanisms is vital for comprehending the formation of the embryo and endosperm.
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