Fig. 2.

Monoclonal antibodies recognizing arabinans prevent arabinanaseinduced locking of guard cell walls. Epidermal strips were incubated with monoclonal antibodies recognizing galactan (LM5), or arabinan side chains (LM6), before digestion with enzymes and subsequent fusicoccin treatment. Final stomatal apertures after various treatments are presented; data are averages and standard errors from measurements of 100 guard cell pairs (from three separate strips) for each treatment. Overall experiments were repeated three times with similar results.