PP — Beta vulgaris subsp. vulgaris

Summary

BvPP (BVRB_7G163730) on sugar beet chromosome 7 encodes a poly(ADP-ribose) polymerase (PARP) family protein with NAD ADP-ribosyltransferase, protein ADP-ribosylase, and poly(ADP-ribose) glycohydrolase activities, along with DNA, mRNA, and zinc binding. The product localises to the nucleus, nucleolus, and mitochondria. In sugar beet, BvPP is associated with DNA ADP-ribosylation, protein poly-ADP-ribosylation, double-strand break repair, non-homologous end joining, chromosome condensation, cell cycle, rRNA processing, lipid homeostasis, and responses to abscisic acid, oxidative stress, osmotic stress, and fungal defence. The gene has been linked to flowering time, flower morphology, root thickness, stomatal closure, drought tolerance, oxidative stress tolerance, disease tolerance, water use efficiency, circadian rhythm, and jasmonic acid content. Studies of related genes in other species connect the PARP family to DNA damage repair, pathogen defence, seed storability, and abiotic stress resistance.