The goal of our GGB multiplication study is to find a PGR combination which best supports the division and rapid growth of the tissues, not for sporophyte formation as seen in the "control" (MS only) (Table 4). As demonstrated in the figures (Figure 1E, 1F and 1G), the sporophyte first regenerated from GGBs emerged as elongated tissue from the surface. The greater the sporophyte regeneration, the less surface area the GGB retained for spots of active cell division and multiplication. For example, as in the "control" (Table 4), once the GGB mass was totally covered by regenerated sporophytes, the single GGB was deformed and was no longer available for the next cycle of multiplication.