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A simple immunological analysis of plant cell wall component epitopes present in 16 gum exudates obtained from 13 species of Acacia trees has shown that each of the gum samples studied had a unique composition. These analyses demonstrated, that in some cases gums harvested from species in the same taxonomic group exhibited wider differences in their composition of cell wall component epitopes as compared to gums from taxonomically unrelated species. Furthermore, gums obtained from different sub-species of a single species (e.g. A. nilotica and A. nilotica sspp. nilotica ) were shown to have very distinct chemical compositions. The results also demonstrated for the first time, the presence of hydroxyproline-rich glycoprotein (HRGP) epitopes in the gum exudates of A. tortilis , A. nilotica , A. nilotica sspp. nilotica , A. microbotrya , A. pycnantha and A . campylacantha . These clearly demonstrate the utility of such immunological tests in chemotaxonomic analyses of this economically important class of plant gum exudates. |
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