Tissue folding at the organ–meristem boundary results in nuclear compression and chromatin compaction

Significance During development, growth deforms tissues and organs. This is notably the case during formation of new flowers in plants, as tissue folds young floral bud emergence. Here, we provide further evidence that organogenesis compresses cells at boundary, separating organ from stem cell niche, show this leads to nucleus compression chromatin changes. While mechanical forces are well known affect shape mammalian culture, demonstrates such an effect also occurs a developing organism suggests may help define boundary domains through large-scale effects.