Abstract
We carried out a morphological investigation into why the Ophiopogon japonicus plant grows under water. Our stereoscopic observations revealed the presence of aerenchymas in Ophiopogon japonicus roots. The oxygen-saturation content rate in the water in which Ophiopogon japonicus plants were placed showed increased level under both light and dark conditions, and root only or both shoot and root were submerged. The root structure of Ophiopogon japonicus plants to be morphologically adapted to contain aerenchymas, which are able to transfer oxygen from shoot to root.
