Chitotetraose tetrahydrochloride is a short-chain chitin oligomer derived from arbuscular mycorrhizal (AM) fungi. This compound effectively activates the conserved symbiosis signaling pathway (CSSP) in actinorhizal plant species.
Tetra-N-acetylchitotetraose, a component of the hpo-chitoo gosacchaπdes (LCOs) secreted from Rhizobia, stimulates plant defense systems. Moreover, it serves as a substrate for the CO deacetylase nodulation protein NodB in Rhizobium leguminosarum.