VIH1 — Asparagus officinalis

Summary

A4U43_C07F35780 (AoVIH1) on asparagus chromosome 7 encodes an inositol hexakisphosphate 1-kinase (EC 2.7.4.24) with PP-IP5 kinase and 5-diphosphoinositol pentakisphosphate 1-kinase activities, and belongs to the VIP1/VIH family. The gene is associated with inositol phosphate metabolism, jasmonic acid and gibberellin signaling, and defence responses to fungi and insects. It has been linked to upregulation of antifungal innate immune responses, vitamin E anabolism, and jasmonate/ethylene-dependent systemic resistance. The encoded protein localises to the plastid, cytosol and plasma membrane. Studies of related genes in other species connect the family to inositol pyrophosphate synthesis, abscisic acid sensitivity, abiotic stress tolerance, and Agrobacterium-mediated transformation, while tomato studies link the family to salicylic acid-dependent immunity.