High air humidity dampens salicylic acid pathway and NPR1 function to promote plant disease

ABSTRACT: The occurrence of plant disease is determined by interactions among host, pathogen and environment. Air humidity shapes various aspects of plant physiology and high humidity has long been known to promote numerous phyllosphere diseases. However, the molecular basis of how high humidity interferes with plant immunity to favor disease has remained elusive. Here we show that high humidity is associated with an "immuno-compromised" status in Arabidopsis plants. Furthermore, accumulation and signaling of salicylic acid (SA), an important defense hormone, are significantly inhibited under high humidity. NPR1, an SA receptor and central transcriptional co-activator of SA-responsive genes, is less ubiquitinated and displays a lower promoter binding affinity under high humidity. The cellular ubiqui

SUBMITTER: Dr. Xiufang Xin 

PROVIDER: S-SCDT-10_15252-EMBJ_2023113499 | biostudies-other |

REPOSITORIES: biostudies-other