The researchers studied two mutated bamboo species to compare their anatomical characteristics. They used optical microscopy to examine the culms and culm bases of ssanggol- and min-bamboo. They found that ssanggol-bamboo had abnormal vascular bundles in the culm base and a wavy surface in the pith cavity, while min-bamboo had more developed fiber bundles. In the culm base, ssanggol-bamboo had more parenchyma and vessels, while min-bamboo had a higher fiber proportion. Min-bamboo had a higher vascular bundle density and smaller vessel diameter compared to ssanggol-bamboo. Ssanggol-bamboo had shorter parenchyma cells but larger vessel diameter, while min-bamboo had longer fibers.