GAI (LSAT_V11C200075120) — Lactuca sativa

Summary

LsGAI (GAI, RGA1, DELLA1) on lettuce chromosome 2 encodes a DELLA protein with a GRAS domain and a DELLA_N regulatory domain, and is associated with E-box, gibberellin, phytochrome and far-red light photoreceptor binding, as well as transcription corepressor binding and SUMO-specific endopeptidase activity. The gene is linked to regulation of gibberellic acid signalling, timing of plant organ formation, trichome morphogenesis, fruit septum development, plant epidermis development, and responses to karrikin, heat and magnetism. Associations with agronomic traits include leaf length-to-width ratio, grain yield, fruit quality, total soluble sugar content, linoleic and linolenic acid content, seed coat hardness, flower number and diameter, panicle number, root width, shoot elongation under submergence, and copper sensitivity. Related genes in other species are linked to dwarfism, stress tolerance, longevity and thermomemory.