Abstract
The Leaf has a complex network as leaf vein. The leaf vein supply water efficiently to the whole of own. If there is some worm hole on its leaf by bug biting, the water in leaf vein flows continuously. This network system might be applied bio-mimically for an electrical and water infrastructure in near future. We observed the flow patterns of water in the Nandina domestica's Leaf vein with three patterns of normal leaf, damaged leaf and only leaf vein. The flow in leaf vein ware visualized by fluorescent solution by own water suction of leaf. As a result, the most of sucked water was flowed in the main leaf vein in each leaves, then the flows were spread into the lateral veins gradually. In the case of damaged leaf, the flow in the main leaf vein stopped at the worm hole, the water was bypassing the hole through the other fine veins. We found that leaf veins supply the water to whole of leaf even if leaf has damage in leaf vein according as a capillary phenomenon.
