PIP2 — Brassica oleracea var. botrytis

Summary

BoPIP2, encoded by gene BOLND125_C04P011550.1 on cauliflower chromosome 4, is a member of the aquaporin family (MIP domain) and is annotated with water channel activity, phospholipase D activity, and protein kinase activity. It is associated with membrane transport, including hydrogen peroxide membrane transport and phosphatidic acid metabolism, and localizes to the plasma membrane, plasmodesmata, and plant-type vacuole. The gene is linked to responses to desiccation, brassinosteroid, salicylate, hypoxia, and aluminum, as well as regulation of stomatal closure and circadian gene expression. Agronomically, BoPIP2 has been connected to photosynthetic rate, root hair length, flowering time, disease tolerance (including downy mildew and powdery mildew responses), salt and drought tolerance, freezing tolerance, and cell elongation and growth traits. Studies of related genes in other species associate the family with water transport, stomatal movement, and pathogen resistance.