Showing papers on "Cestrum published in 1959"

Karyotype studies in Cestrum as an aid to taxonomy.

Abstract: In the course of investigations on the possibilities of leaf-tip smear techniques on a large number of dicotyledonous plants, the genus Cestrum attracted the attention of the authors due to its chromosome morphology, unusual for other Solanaceous members. On further scrutiny, it was revealed that all tile species are characterised by a low number of chromosomes, with remarkable gross homogeneity in their morphology. The chromosome size is unusually large for dicotyledons. In India, a number of species and varieties are cultivated for their horticultural importance, both in Temperate and Tropical regions. In the cooler areas, a few of them, such as C. aurantiacum, are found growing wild. Tile different varieties are of ornamental importance due to their flowers, which are colourful or emit a very sweet smell. The method of propagation of the representatives of this genus is quite interesting. They are all cultivated solely through cuttings. Though flowering is regular, seed-setting is scarcely observed. This may possibly be a consequence of their cultivation through asexual means. But even in Temperate Himalayas, where some species grow wild, seed-formation is not noticed. All these facts call for a detailed cytological investigation of the