Cloning and Expression Analysis of PIN1 and PIN2 Encoding Auxin Efflux Carriers in Rosa canina Cloning and Expression Analysis of PIN1 and PIN2 Encoding Auxin Efflux Carriers in Rosa canina Cloning and Expression Analysis of Auxin Efflux Carrier Gene CsPIN3 in Tea Plant (Camellia sinensis) Phosphorylation-dependent Trafficking of Plasma Membrane Proteins in Animal and Plant Cells