Auxin distribution is differentially affected by nitrate in roots of two rice cultivars differing in responsiveness to nitrogen

摘要

Background and AimsAlthough 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.