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Effect of cellulase hydrolysis on holm oak adaxial (A, B, and C) and abaxial (D) leaf surfaces. A, Intact, adaxial leaf surface. B, Adaxial leaf surface after 4 d in cellulase solution. C, Adaxial leaf surface after 7 d in cellulase solution. D, Abaxial leaf surface after 7 d in cellulase solution.
