Phosphorylation of Arabidopsis NRT1.1 regulates plant stomatal aperture and drought resistance in low nitrate condition.

ABSTRACT:

Background

NITRATE TRANSPORTER 1.1 (NRT1.1) functions as a dual affinity nitrate transceptor regulated by phosphorylation at threonine residue 101 (T101). Previous studies have suggested that NRT1.1 is involved in stomatal opening and contributes to drought susceptibility. However, the precise mechanism of how the phosphorylation status of NRT1.1 affects stomatal movement and drought tolerance remains unclear.

Results

In this study, we observed that seedlings expressing the phosphorylated form of NRT1.1 (NRT1.1^T101D, T101D) exhibited increased drought tolerance compared to dephosphorylated NRT1.1 (NRT1.1^T101A, T101A) mutants under low nitrate (LN) condition, characterized by decreased stomatal aperture and water loss. Moreover, we found that the drought

SUBMITTER: Kou Y 

PROVIDER: S-EPMC11756150 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature