Twenty cyclamen taxa belonging to the Primulaceae originate from the Mediterranean region and grow under trees and bushes. There are 10 cyclamen species growing naturally in Turkey, five of which are endemic. In this study, intact cyclamen plants were collected from nature with their tubers intact. Collection took place in spring and autumn in Adana, Osmaniye, Kahramanmaraş, İzmir and Eskişehir provinces, 50 samples per location. Sampled plants were propagated and cultivated in Adana. The morphology of four Cyclamen species (C. persicum Mill., C. cilicium Boiss.e.Heldr., C. pseudibericum Hildebr. and C. coum Mill.) was characterized using 1-year-old regenerated plants. A total of 27 phenotypic characters (13 flower, 11 leaf, 2 plant, 1 tuber) were evaluated based on a detailed descriptor's list. In addition to these morphological observations, 13 quantitative traits (7 flower, 5 leaf, 1 tuber) were measured. The measurements related to morphological characteristics had a wide range of variation, including in tuber diameter, leaf length and width, petal length, petal color, and leaf shape, indicating the vast morphological differences among these four cyclamen species. In most cases, the use of principal component analysis confirmed the grouping of characters into species-specific clusters although one or two clusters could not differentiate species, indicating that morphological and cluster analyses alone are not enough for characterizing this complex Cyclamen germplasm and that molecular techniques may reveal more intricate and useful relationships.
In this study, embryo-like structures (ELSs) were induced in four endemic Turkish Cyclamen species (C. cilicium Boiss. et Heldr., C. parviflorum Pobed., C. mirabile Hildebr. and C. pseudibericum Hildebr.) in the presence of 13 combinations of two plant growth regulators (PGRs) (2,4-dichlorophenoxyacetic acid and 6-(c,cdimethylallylamino)purine) and four explant types (ovules, ovaries, leaves and petioles). The ratio of callus induction, different stages of ELS formation and the conversion of ELSs to plantlets were quantified. The most effective explant types for callus induction were leaves (56 % for C. cilicium and 59 % for C. parviflorum) and petioles (80 % for C. mirabile and 100 % for C. pseudibericum). Callus growth from the leaves and petioles of C. cilicium was 30 days earlier than that of C. mirabile and C. pseudibericum. In contrast, most callus formed from the petioles of C. pseudibericum (100 %) in medium with 2.5 mg l -1 2,4-D and 1 mg l -1 2iP. The highest number of ELSs was obtained succesfully from petioles (2.5 mg l -1 2,4-D and 1 mg l -1 2iP) and ovaries (2.5 mg l -1 2,4-D and 0.5 mg l -1 2iP) of C. pseudibericum, in 39 % and as 32 % of explants, respectively. The percentage conversion of ELSs to plantlets was 38, 31, 16 and 15 % for C. mirabile, C. cilicium, C. pseudibericum and C. parviflorum, respectively. The plantlets were successfully acclimatized in the greenhouse with 54, 70, 63 and 25 % of C. cilicium, C. mirabile, C. pseudibericum and C. parviflorum plantlets, respectively surviving after transfer to ex vitro conditions. This paper describes a unique, reliable and consistent protocol for the induction of ELSs from four endangered endemic Turkish Cyclamen species, opening up the possibility of preserving these valuable genetic resources in vitro and also other applied biotechnologies that rely on a stable embryogenic or callus-based protocol.
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Saffron (Crocus sativus L.) is one of the most important species in Crocus genus because of its effective usage. It is not only a very expensive spice, but it has also a big ornamental plant potential. Crocus species are propagated by corm and seed, and male sterility is the most important problem of this species. Hence, somatic embryogenesis can be regarded as a strategic tool for the multiplication of saffron plants. In this chapter, the production of saffron corms via somatic embryogenesis is described.
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