PIP2 — Brassica oleracea

Summary

BoPIP2 (BOLC102_C06P025070.1) on cabbage chromosome 6 encodes an aquaporin family protein with water channel activity, phospholipase D activity, and protein kinase activity. It is associated with phosphatidic acid metabolism, glucosinolate transport and breakdown, hydrogen peroxide membrane transport, response to desiccation, brassinosteroid response, regulation of stomatal closure, and circadian regulation of gene expression. The protein localizes to the plasma membrane, plasmodesmata, endoplasmic reticulum, Golgi, vacuole, and extracellular region. BoPIP2 is linked to numerous agronomic traits including photosynthetic rate, stomatal resistance, root hair length, flowering time, cadmium concentration, cellulose content, and responses to salt, drought, freezing, and low temperature stress. It has also been connected to disease tolerance, including downy mildew and powdery mildew responses, as well as pathogen defense and immunity. Studies of related genes in other species link the PIP2 family to water transport, stomatal movement, root hydraulic conductivity, and hydrogen peroxide transport.