Knockdown of the partner protein OsNAR2.1 for high-affinity nitrate transport represses lateral root formation in a nitrate-dependent manner.

ABSTRACT: The morphological plasticity of root systems is critical for plant survival, and understanding the mechanisms underlying root adaptation to nitrogen (N) fluctuation is critical for sustainable agriculture; however, the molecular mechanism of N-dependent root growth in rice remains unclear. This study aimed to identify the role of the complementary high-affinity NO3(-) transport protein OsNAR2.1 in NO3(-)-regulated rice root growth. Comparisons with wild-type (WT) plants showed that knockdown of OsNAR2.1 inhibited lateral root (LR) formation under low NO3(-) concentrations, but not under low NH4(+) concentrations. (15)N-labelling NO3(-) supplies (provided at concentrations of 0-10 mM) demonstrated that (i) defects in LR formation in mutants subjected to low external NO3(-) concentrations re

SUBMITTER: Huang S 

PROVIDER: S-EPMC4672285 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature