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In many plants, only the outermost cells are specified into the epidermis, with underlying mechanisms unknown. Here, the authors show that a key epidermis identity gene is activated in surface cells, via positional cues involving mechanical signals.
Time-lapse imaging of the fern Ceratopteris richardii during meristem initiation and proliferation provides insights into the lineage, identity and division activity of each cell throughout the growth of gametophytes.
Single-cell profiling of callus from hypocotyl explants shows the heterogeneity of this tissue and identifies gene networks needed for plant regeneration, in particular the essential roles of WOX5 and WOX7 in this biological process.
Robin Lardon et al. report a genome-wide association study of shoot regeneration in Arabidopsis under 2 different in vitro incubation conditions. They find wide variation in regeneration phenotypes, attributable to allelic variants in key developmental genes, and show that genetic association patterns differ depending on environmental factors.
Hormone-induced plant regeneration involves acquisition of pluripotency based on auxin–cytokinin crosstalk. A recent study demonstrates the spatial and functional organization of callus cells and the role of pluripotent middle-layer cells in de novo tissue regeneration.
Plant researchers have speculated about the need for mechanisms to lock-down cell fate in late development. In PRC2 mutants, specialized, endoreplicated root hair cells differentiate normally but later revert to an embryo-like state.
Epidermal injury-induced derepression of key regulator ATML1 in newly exposed cells elicits epidermis regeneration
Positional cues and cell division dynamics drive meristem development and archegonium formation in Ceratopteris gametophytes
In-vitro propagation and phytochemical profiling of a highly medicinal and endemic plant species of the Himalayan region (Saussurea costus)
Pluripotency acquisition in the middle cell layer of callus is required for organ regeneration
Impact of tillage and crop establishment methods on rice yields in a rice-ratoon rice cropping system in Southwest China
The genetic framework of shoot regeneration in Arabidopsis comprises master regulators and conditional fine-tuning factors
Regenerating from the middle
Development: Acting your cellular age