Sjon Hartman

Keywords chromatin modification H3K27me3 PRC2 polycomb hypoxia N-degron pathway PIF signaling phytochrome red light signaling cell expansion-mediated growth Introduction Changes in chromatin structure play an important role in regulating gene expression in eukaryotes.

Ethylene aplenty signals soil compaction It's tough to drive a spade through compacted soil, and plant roots seem to have the same problem when growing in compacted ground. Pandey et al. found that the problem is not, however, one of physical resistance but rather inhibition of growth through a signaling pathway. The volatile plant hormone ethylene will diffuse through aerated soil, but compacted soil reduces such diffusion, increasing the concentration of ethylene near root tissues.