Propagation of Asclepias tuberosa from short root segments

Abstract

Upper, middle and lower short root segments of Asclepias tuberosa were planted in 21 pots, using various planting positions. Plants were grown in a heated greenhouse, under controlled 25 16 ° C (D/N) temperature and 16 h day length. Shoots initiated from the proximal end and roots from the distal end of each root segment, regardless of the orientation to gravity. The upper segments emerged and flowered much earlier than the middle or lower segments; the middle segments emerged later than the lower segments. Main stem length and total branching length were considerably greater in the upper segments compared with the middle or lower segments. Planting position had no significant effect on the growth parameters measured.