Abstract
Liquid cultures were successfully generated from cotyledons of two Sonneratia species, S. alba and S. caseolaris in Murashige and Skoog (MS) medium containing 0.1 μmol L−1 2,4-dichlorophenoxyacetic acid (2,4-D). Adventitious roots differentiated from cotyledons of S. alba. Proliferated cells were subcultured and a large volume of suspension cells was subsequently established in 100-mL flasks. All the cytokinins tested inhibited cell proliferation. After three years of culture, the potential to differentiate was tested as indicated by greening of the cells. Greening occurred when suspension cells were transferred to solid MS medium with and without 0.1 μmol L−1 2,4-D. Greening was stimulated by low concentrations of the weak auxins indolebutyric acid (IBA) and naphthaleneacetic acid (NAA) while 2,4-D stimulated late-stage greening. Abscisic acid (ABA) inhibited greening. Gibberellic acid (GA3) at 1.0 μmol L−1 stimulated callus greening and was not inhibitory even when tested at high concentrations. Cytokinins were inhibitory in combination with 0.1 μmol L−1 of either IBA or NAA. The cause of different effects of plant hormones on growth and differentiation was discussed. Small-scale liquid media and 24-well culture plates of solid media methods developed in this paper are suitable for the optimization of hormonal conditions for cell proliferation and differentiation.
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Abbreviations
- ABA:
-
Abscisic acid
- BA:
-
Benzyladenine
- CPPU:
-
N-(2-chloro-4-pyridyl)-N′-phenylurea
- 2,4-D:
-
2,4-Dichlorophenoxyacetic acid
- GA3 :
-
Gibberellic acid
- IBA:
-
Indolebutyric acid
- 2-iP:
-
2-iso-Pentenyladenine
- MS:
-
Murashige and Skoog
- NAA:
-
Naphthaleneacetic acid
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Y.K., R.Y., and H.S. thank Professor E.C. Yeung of the University of Calgary for his critical reading of this manuscript.
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Kawana, Y., Yamamoto, R., Mochida, Y. et al. Generation and maintenance of suspension cultures from cotyledons and their organogenic potential of two mangrove species, Sonneratia alba and S. caseolaris . Plant Biotechnol Rep 1, 219–226 (2007). https://doi.org/10.1007/s11816-007-0035-2
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DOI: https://doi.org/10.1007/s11816-007-0035-2