Interspecific differences in differentiation and dedifferentiation patterns in the genus Nicotiana
Cite this article as: Bogani, P., Buiatti, M., Tegli, S. et al. Pl Syst Evol (1985) 151: 19. doi:10.1007/BF02418016 Abstract
Differentiation on hormoneless media, habituation ability and crown gall induction in
Nicotiana tissue cultures have been used as physiological parameters of evolutionary differentiation between species. Some of them on hormone free media differentiated whole plantlets, others produced only shoots or roots or showed undifferentiated growth (habituation), some eventually died. Moreover, the same genotypes showed a differential behaviour as far as tumor formation by Agrobacterium tumefaciens was concerned. Particularly, the competence for crown gall transformation in Nicotiana species seems negatively correlated with differentiation capacity and may be ascribed to differences in the plants capacity to synthesize growth regulators. The correlation between the results obtained and the phylogenetic position of the genotypes tested is finally discussed. Key Words Angiosperms Solanaceae Nicotiana. — Habituation differentiation crown gall tissue culture evolution References
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