Exogenous application of pectin triggers stomatal closure and immunity in Arabidopsis.

ABSTRACT: Pectin has been extensively studied in animal immunity, and exogenous pectin as a food additive can provide protection against inflammatory bowel disease. However, the utility of pectin to improve immunity in plants is still unstudied. Here, we found exogenous application of pectin triggered stomatal closure in Arabidopsis in a dose- and time-dependent manner. Additionally, pectin activated peroxidase and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase to produce reactive oxygen species (ROS), which subsequently increased cytoplasmic Ca²⁺ concentration ([Ca²⁺ ]_cyt ) and was followed by nitric oxide (NO) production, leading to stomatal closure in an abscisic acid (ABA) and salicylic acid (SA) signalling-dependent mechanism. Furthermore, pectin en

SUBMITTER: Zhang C 

PROVIDER: S-EPMC10887356 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature