PP5 — Brassica oleracea var. botrytis

Summary

BoPP5 (PP5) on cauliflower chromosome 4 encodes a protein with domains including PP5_C, PPP_dom, and TPR repeats, and is annotated with tetrapyrrole binding, red/far-red light photoreceptor activity, phosphorelay sensor kinase activity, histidine kinase activity, and protein serine/threonine phosphatase activity. It is associated with light absorption, downregulation of chlorophyll anabolism, chloroplast-nucleus signaling, circadian regulation of calcium ion oscillation, and abscisic acid metabolism. The gene is linked to numerous agronomic traits including grain yield, biomass yield, panicle number, flower diameter, leaf angle, photoperiod-sensitive flowering time, photosynthetic ability, transpiration rate, and responses to red, far-red, blue, and UV-B light. It is also connected to chloroplast development, stomatal development, hypocotyl growth, phototropism, pathogen resistance, and arsenic tolerance. Studies of related genes in other species link the family to thermotolerance, light signaling, and grain yield.