PR1 — Oryza sativa Japonica

Summary

OsPR1 (OS07G0126401) on rice chromosome 7 encodes a protein belonging to the CAP (cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1) superfamily, containing a V5 allergen-like domain and a CRISP-related region. The gene is associated with diverse biological processes including regulation of hormone levels, cellular response to toxic substances, salicylic acid anabolism, anthocyanin anabolism, appressorium formation, hyphal growth, pigmentation, and secretion. It is linked to extracellular and vacuolar localisation. Associations with agronomically relevant traits include grain size, grain yield, plant height, chlorophyll a and b content, total chlorophyll content, and anthocyanin content. Studies of related pathogenesis-related PR-1 proteins in other species connect the family to defence responses, though these functions are not yet established for OsPR1 itself.