The effect of microfibrillar orientation of bamboo (Phyllostachys virideglaucescence) cell wall on the development of soft rot (Chaetomium globosum) penetration hyphae was investigated. It was found that the soft rot penetration hyphae normally followed the microfibril angle of the cell wall. Bamboo cell walls have alternating broad and narrow lamellae with different microfibrillar angles. The microfibrillar angle of the broad lamellae is mostly oriented vertically, whilst the narrow lamellae are mostly oriented horizontally. Soft rot penetration hyphae normally follow these microfibrillar angles.

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