Enucleation of protoplasts derived from suspension cultures of winged bean and from a crown gall cell line ofParthenocissus tricuspidata |
| |
Authors: | H Fakhrai H Haq P K Evans |
| |
Institution: | (1) Department of Biology, University of Southampton, Building 44, S09 5NH Southampton, UK;(2) Present address: Department of Botany, University of Durham, South Road, DHl 3LE Durham, UK |
| |
Abstract: | Protoplasts derived from suspension cultures of the winged bean and a crown gall lineof Parthenocissus tricuspidata were enucleated by centrifugation on iso-osmotic discontinuous Percoli gradients and on discontinuous sucrose-mannitol density
gradients. Enucleation was achieved according to the buoyant density of the protoplasts and preparations of both cytoplasts
and miniprotoplasts were recovered. The Percoll gradients gave more satisfactory results than the sucrose-mannitol gradients.
Enucleation was increased by raising the centrifugal force from 20 kg to 60 kg. The presence of nuclei was determined by the
DNA specific probe 4′6-diamidino-2-phenylindole (DAPI). Membrane integrity, as measured by staining with fluorescein diacetate,
showed that some 85 % of the cytoplasts were bounded by an intact plasma membrane. |
| |
Keywords: | density gradients cytoplasts minieells |
本文献已被 SpringerLink 等数据库收录! |
|