FBP — Beta vulgaris subsp. vulgaris

Summary

BvFBP (BVRB_5G111340) on sugar beet chromosome 5 encodes a fructose-1,6-bisphosphatase, a class I enzyme with fructose-1,6-bisphosphate 1-phosphatase activity that also exhibits protein kinase activity and metal binding. The gene is associated with the reductive pentose-phosphate cycle, gluconeogenesis, sucrose and fructose metabolism, nitrogen utilization, glutamate metabolism, and regulation of flavonoid anabolism. Its product localizes to the chloroplast stroma, stromule, apoplast, cytosol, and plasmalemma. BvFBP is associated with photosynthetic rate, root thickness, manganese and osmotic response sensitivity, abscisic acid sensitivity, disease tolerance, and salt tolerance. Observed phenotypes include altered soluble sugar content, starch accumulation, cyclic electron flow, root vascular layer number, stomatal development, and plant growth. Related genes in other species are linked to abscisic acid signaling, root growth, and traits including total soluble sugar content, sucrose content, starch content, and stomatal opening.