Sporophytes started to form in the cultured GGBs during the second week of incubation. The sporophyte formation was first seen at the epidermis of the GGB, where a group of small but rapidly dividing cells with dense cytoplasm became activated (Figure 1E). This area further increased in size and elongated toward the outer layer of the GGB surface (Figure 1F). Under the stereomicroscope it could be seen that this elongation was formed of a short rod-like tissue, light green in color (Figure 1G).