n orchids, itwas found to positively affect floral production in Dendrobium‘Eiskul’, where a particular type of chitosan, oligomeric chitosanwith an 80% degree of deacetylation (O80), but not polymericchitosan or oligomeric preparations with different degrees ofacetylation, caused an increase in the chloroplast size and in thenumber of inflorescences produced, suggesting also then thespecificity of the chitosan molecule and plant species that willrespond positively ( Limpanavech et al., 2008).