GPA1 — Brassica napus

Summary

BnGPA1 (GPA1) on chromosome A09 of oilseed rape encodes a plant G-protein alpha subunit, a member of the heterotrimeric G-protein complex. The gene is associated with a wide range of molecular functions including G protein-coupled receptor binding, GTPase inhibitor activity, and signaling receptor binding. It has been linked to numerous biological processes such as upregulation of stomatal opening, maintenance of seed dormancy, reactive oxygen species-mediated programmed cell death, and nitrogen utilization. Associations with agronomically important traits include seed quality, grain size, harvest index, bacterial blight disease resistance, seed longevity, germination rate, days to flowering, and responses to abiotic stresses like high temperature, UV light, and aluminum. The gene is also connected to phenotypes including salt stress tolerance, heat tolerance, primary root elongation, photosynthesis, and hormone response. Studies of related genes in other species link the family to sugar signaling, seed dormancy, drought response, and disease resistance to Pseudomonas syringae.