PR1 — Oryza sativa Japonica

Summary

OsPR1 (OS07G0125500) on rice chromosome 7 encodes a protein belonging to the CAP (cysteine-rich secretory protein, antigen 5, and pathogenesis-related 1) superfamily, containing a CAP domain and a CRISP-related region. This gene is associated with regulation of hormone levels, cellular response to toxic substances, salicylic acid anabolism, appressorium formation, hyphal growth, pigmentation, and secretion. It is linked to extracellular localization and the vacuole. Trait associations include grain size, grain yield, plant height, chlorophyll a and b content, anthocyanin content, and overall chlorophyll content. Studies of related genes in other species connect the family to defense responses, though these specific associations are not yet established in rice.