Biologia plantarum 30:247-251, 1988 | DOI: 10.1007/BF02878202
Karyotype stability in long-term callus derived plants ofCrepis tectorum L.
- 1 Centre of Advanced Study, Department of Botany, University of Calcutta, Calcutta, India
The study of in vitro growth of Crepis tectorum revealed 100 % callusing and 40 % plantlet regeneration. The root and leaf used as explants showed the normal diploid (2n=8) chromosome constitution. In one month old culture 95 % callus cells were diploid. The callus maintained in 2,4-D 1 mg 1-1 for two years showed 62 % diploid, 5 % tetraploid and 33 % hyperdiploid cells. The differentiation of shoot occurred in two year old calli after subeulturing in 2 mg I-1 BAP and the potentiality of regeneration was retained for more than one year. The leaf-tips of regenerated plants were homogeneous and identical to the donor plant both in number and morphology of chromosomes.
Received: September 3, 1987; Accepted: December 28, 1987; Published: July 1, 1988 Show citation
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