Auxin distribution is differentially affected by nitrate in roots of two rice…

Background and Aims: Although ammonium (NH4+) is the preferred form of nitrogen over nitrate (NO3-) for rice (Oryza sativa), lateral root (LR) growth in roots is enhanced by partial NO3- nutrition (PNN). The roles of auxin distribution and polar transport in LR formation in response to localized NO3- availability are not known. Methods: Time-course studies in a split-root experimental system…