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-1indolebutyric 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. © 2010 The Society for In Vitro Biology.
In vitro propagation of Cistus clusii Dunal, an endangered plant in Italy
Ruta, Claudia;
2010-01-01
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-1indolebutyric 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. © 2010 The Society for In Vitro Biology.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
