Therefore the material infrastructure may also interfere in the electric conductance. Wang et al. have demonstrated that the conductance of bamboo, sugarcane, lettuce and mustard can differ if it is measured along the stem or across it. Wang et al.argue that the difference in electric conductance measurements from the same material should, therefore, be explained by tissue infrastructure rather than chemical composition. It was observed that both the orientation of vascular bundles and the shape of parenchyma cells can influence the electric conductance in vegetables