Contact-mediated algicidal mechanism of Vibrio coralliirubri ACE001 against the harmful alga Karenia mikimotoi.

ABSTRACT: Karenia mikimotoi is a harmful algal bloom (HAB) species that poses a significant threat to marine ecosystems due to its hemolytic toxins. This study isolated Vibrio coralliirubri (ACE001), which demonstrated contact-dependent algicidal effects against K. mikimotoi. Chemotaxis assays revealed ACE001's strong attraction to K. mikimotoi cell membranes, indicating the importance of chemotaxis. ACE001 caused a significant decrease in Chlorophyll a and an increase in reactive oxygen species (ROS), indicating oxidative stress. Scanning electron microscopy showed ACE001 adheres to and penetrates K. mikimotoi, leading to cell rupture. Dual RNA-seq revealed suppression of the type VI secretion system (T6SS) and the upregulation of the Sec secretion system,

SUBMITTER: Yu J 

PROVIDER: S-EPMC11576403 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature