H2B — Asparagus officinalis

Summary

A4U43_C07F2670 (AoH2B) on asparagus chromosome 7 encodes a core histone H2B family protein with a histone-fold domain and is annotated with structural constituent of chromatin, DNA binding, and protein heterodimerization activity. The gene is associated with diverse biological processes including meiotic chromosome separation, DNA methylation-dependent heterochromatin assembly, regulation of vegetative phase change, and responses to biotic stimuli, osmotic stress, and silver ions. It has been linked to traits such as leaf trichome density, flower and inflorescence development, days to flowering, stem senescence, auxin and jasmonic acid content, and responses to high and low temperature stress, aluminum, and light intensity. Associations with Agrobacterium transformation efficiency, haploid induction, centromere function, fertility, and reduced drought tolerance have also been noted. Studies of related genes in other species link the family to chromatin structure, ABA response, disease resistance, and seed germination.