In Vitro Micropropagation of the aquarium plant Ludwigia repens

Apical meristems, first, second and third-fourth axillary buds of Ludwigia repens were cultured on Murashige and Skoog (MS) medium containing various concentrations of 6-benzylaminopurine (BAP), thidiazuron (TDZ) and αnaphthaleneacetic acid (NAA) for micropropagation. Micropropagation was best achieved from apical meristem on MS medium containing 0.05 mg dm TDZ and 0.1 mg dm NAA. It was noted that TDZ or BAP had inhibitory effect on shoot elongation, which was overcome by subculturing shoots on half-strength MS media without growth regulators after 4 weeks of culture. This also served as rooting media. Rooted plantlets were finally transferred to aquariums containing fresh water with 100% adaptation.