Somatic Embryogenesis Induction in Tamarillo (Cyphomandra betacea)

Part of the Forestry Sciences book series (FOSC, volume 67)


Cyphomandra betacea (Cay.) Sendtn. usually known as tamarillo or tree tomato, is a solanaceous soft wood tree (Fig. 1A) grown for their edible fruits (Fig. 1B). The species, which may reach 2 – 4 meter height (Slack, 1976), produces tomato-like red, orange or yellow fruits according with the cultivars. The fruits of the red cultivar are the most popular due to their more striking appearance and better flavour (Slack, 1976). They are generally 2 – 3 inches long and 2 inches in diameter possessing many seeds (Hooker, 1899). Also included in the same genus are the species Casana (Cyphomandra casana), Mountain Tomato (C. crassifolia) and Guava Tamarillo (C. fragans). The plant can be propagated by seeds or cuttings (Fougue, 1973) or it may be grafted in Solanum mauritianum (Slack, 1976). In the first case, plants do not usually come true-to-type rendering difficult the propagation of selected genotypes (Barghchi, 1998). Several authors (see section 1.3) have also reported protocols for in vitro regeneration. The first pinkish flowers appear in spring, while the mature fruits are collected from October to April (Guimarães et al., 1996). However, flower appearance and fruit maturity can be changed by pruning (Slack, 1976).


Somatic Embryo Somatic Embryogenesis Embryogenic Callus Zygotic Embryo Auxin Polar Transport 
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© Springer Science+Business Media Dordrecht 2000

Authors and Affiliations

  1. 1.Departamento de Botânica (Centro de Biologia Vegetal), Faculdade de Ciências e TecnologiaUniversidade de CoimbraCoimbraPortugal

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