TOC1B — Cicer arietinum

Summary

TOC1B (PRR1) on chickpea chromosome 5 encodes a phosphorelay response regulator with DNA-binding transcription factor activity, phytochrome binding, and blue light photoreceptor activity, containing ARR-like and CCT domains. It is associated with rhythmic processes, regulation of protein-containing complex assembly, negative regulation of cellulose anabolism, downregulation of circadian rhythm, response to water-immersion restraint stress, photoentrainment of circadian clock, positive regulation of thermomorphogenesis, proteasomal protein catabolic process, regulation of auxin biosynthetic process, regulation of plant organ morphogenesis, retrograde response, regulation of photosynthesis, plastid organization, regulation of stomatal complex patterning, nuclear import, cutin-based cuticle development, downregulation of long-day photoperiodism, flowering, and starch metabolism. Associations include traits such as photoperiod sensitivity, seed protein content, leaf area, vegetative vigor, and drought stress tolerance. Studies of related genes in other species connect the family to circadian rhythm, photoperiod-dependent flowering, root development, seed longevity, and abiotic stress responses including drought recovery and nitrogen stress tolerance.