Abstract
Shoot tips and nodes from a genotype of Cistus clusii were cultured on a medium containing Murashige and Skoog macronutrients, Nitsch and Nitsch micronutrients, sucrose, iron, thiamine, myoinositol, and agar. This establishment medium, enriched with growth regulators and the biocide substances Plant Preservative Mixture and Thiabendazole lactate, improved explant survival by 14–16% and reduced contamination late in culture. For the proliferation stage, the explants rapidly formed axillary buds on a culture medium containing 6-benzylaminopurine (0.5 mg l−1). The best response for rooting was obtained on a culture medium with a 0.1 mg l−1 indolebutyric acid supplement. Rooted plantlets were acclimatized to greenhouse conditions and then transferred to the field in order to evaluate their phenotypic homogeneity. Karyotyping showed that the in vitro propagated plantlets have the same chromosome numbers as the mother plants. The success of this work indicates that micropropagation can be a useful tool for the conservation of C. clusii Dunal, an endangered plant in Italy.
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Acknowledgments
The authors are grateful to Mr. Martin Baxter, English Language Professor at the Language Laboratory of Bari Polytechnic, for his valuable language assistance in the preparation of the manuscript. Thanks are due to Prof. Francesco Macchia, full professor of Botany and director of Botanic Gardens of Bari University, for providing C. clusii Dunal plants.
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Ruta, C., Morone-Fortunato, I. In vitro propagation of Cistus clusii Dunal, an endangered plant in Italy. In Vitro Cell.Dev.Biol.-Plant 46, 172–179 (2010). https://doi.org/10.1007/s11627-010-9284-9
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DOI: https://doi.org/10.1007/s11627-010-9284-9