Chitosan stimulates root hair callose deposition, endomembrane dynamics, and inhibits root hair growth.

ABSTRACT: Although angiosperm plants generally react to immunity elicitors like chitin or chitosan by the cell wall callose deposition, this response in particular cell types, especially upon chitosan treatment, is not fully understood. Here we show that the growing root hairs (RHs) of Arabidopsis can respond to a mild (0.001%) chitosan treatment by the callose deposition and by a deceleration of the RH growth. We demonstrate that the glucan synthase-like 5/PMR4 is vital for chitosan-induced callose deposition but not for RH growth inhibition. Upon the higher chitosan concentration (0.01%) treatment, RHs do not deposit callose, while growth inhibition is prominent. To understand the molecular and cellular mechanisms underpinning the responses to two chitosan treatments, we analysed early Ca^2+</

SUBMITTER: Drs M 

PROVIDER: S-EPMC11615431 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature