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Certain plant cell wall constituents have been found in gum samples derived from Acacia trees, thus analytical techniques for the determination of these plant cell wall components in any media can be applied in the analysis of the physico-chemical properties of these gums. In this experiment, gum samples harvested from various Acacia trees grown in different African countries were subjected to a dot immunobinding reaction using a panel of anti-plant cell wall directed monoclonal antibodies since the gum samples have been found to contain certain plant cell wall constituents. Five antiplant cell wall monoclonal antibodies, JIM 5, JIM 7, JIM 13, LM 6 and MAC 207 were reacted with fifteen gum Arabic samples 1 – 15 and water as control. The results showed that apart from reacting with the monoclonal antibodies, gum samples showed varying degrees of reactivity with the monoclonal antibodies. JIM 5 indicated no reaction with any of the gum samples, whereas JIM 7, JIM 13, LM 6 and MAC 207 exhibited reactions with the samples. The results suggest that, anti-plant cell wall directed monoclonal antibodies can be used as a tool to distinguish between gum Arabic samples from different tree species, as well as from different African countries. Thus, a testing kit which is easy to use and cheaper to acquire can be developed using anti-plant cell wall monoclonal antibodies, to improve quality control in the current gum trade.

Reaction of gum arabic samples with monoclonal antibodies directed to plant cell wall polymers in dot immunobinding