Nature Structural & Molecular Biology, Published online: 27 May 2026; doi:10.1038/s41594-026-01822-7This study shows that yolk, a conserved vehicle for nutrient provisioning to developing eggs, also transports regulatory small RNAs, such as microRNAs, from somatic tissues to the germline and embryos. This pathway links the maternal environment to inherited regulatory information and stress resilience in the next generation.

Chez les plantes, les cellules ne peuvent ni se déplacer ni se réorganiser librement en raison de leur paroi rigide.

Nature Structural & Molecular Biology, Published online: 17 June 2025; doi:10.1038/s41594-025-01572-yConstitutive heterochromatin can promote piRNA transcription, a crucial step in genome defense. Two studies now show that piRNA transcription in Drosophila is regulated by the dual histone marks H3K27me3 and H3K9me3, and piRNA transcription in Caenorhabditis elegans is enhanced by H3K27me3, gene clustering and phase separation.

Nature Structural & Molecular Biology - Constitutive heterochromatin can promote piRNA transcription, a crucial step in genome defense. Two studies now show that piRNA transcription in...