Alternative Splicing Confers a Dual Role in Polar Auxin Transport and Drought Stress Tolerance to the Major Facilitator Superfamily Transporter ZIFL1

Major facilitator superfamily (MFS) transporters constitute a major class of transporter in all organisms. They are prevalent in plants; the Arabidopsis thaliana genome contains over 120 genes predicted to encode MFS transporters. However, relatively few have been characterized, such as nitrate