Epigenetic control of transposon activity and dosage in pollen and hybrid seeds

  • Date: Sep 28, 2022
  • Time: 02:00 PM - 03:30 PM (Local Time Germany)
  • Speaker: Filipe Borges
  • Institut Jean-Pierre Bourgin - INRAE, Versailles, France
  • Location: Central Building
  • Room: Lecture Hall
  • Host: Claudia Köhler


The regulation of genome dosage is of fundamental importance in different biological systems, ranging from imprinting to nucleolar dominance and dosage compensation. In plants, the “triploid block” is a classic example of dosage regulation, and our recent results have shown that plants use small RNAs to sense parental genome dosage in hybrid seeds. The paternal epigenome is a key component of this process, as loss of DNA methylation and transposon-derived siRNAs in pollen allows bypassing the triploid block almost completely. In this seminar, I will discuss our current efforts to study the origins, dynamics and function of reproductive small RNAs responsible for hybrid seed collapse, as well as their targets.

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