Abstract

The Torpedo grass (Panicum repens L.) tuber growth depends on dark and light conditions. When exposed to light, the tuber growth is stopped, the bud on the old tuber can't grow into young tuber. The bud transforms into shoot by the activity of apical meristem and intercalery meristems. Tuber only grow on dark conditions. From the old tuber usually a bud grows into young tuber. Plant hormones are involved in the tuber growth. On the light condition, the auxin activity considerably decreases whereas the abscisic acid and the gibberllini activities increase. Gibberllin relates to the activity of the intercalely meristems.