Establishment of in Vitro Flowering Culture System of Paulownia Plants Effects of nitrogen on growth and flowering of test-tube plantlets of Gomphrena globosa Plant Regeneration from Protoplasts of Talinum paniculatum TISSUE AND MONOCELL CULTURE AND IN VITRO FLOWERING AND FRUITING OF TALINUM PANICULATUM Effect of ABA on the in Vitro Induction of Floral Buds of Dendrobium candidu Wall.ex Lindl.