GARP transcription factors repress Arabidopsis nitrogen starvation response via ROS-dependent and -independent pathways.

ABSTRACT: Plants need to cope with strong variations of nitrogen availability in the soil. Although many molecular players are being discovered concerning how plants perceive NO3- provision, it is less clear how plants recognize a lack of nitrogen. Following nitrogen removal, plants activate their nitrogen starvation response (NSR), which is characterized by the activation of very high-affinity nitrate transport systems (NRT2.4 and NRT2.5) and other sentinel genes involved in N remobilization such as GDH3. Using a combination of functional genomics via transcription factor perturbation and molecular physiology studies, we show that the transcription factors belonging to the HHO subfamily are important regulators of NSR through two potential mechanisms. First, HHOs directly repress the high-affinity

SUBMITTER: Safi A 

PROVIDER: S-EPMC8096604 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature