Effect of cutting age and substrate temperature on rooting of <Emphasis Type="Italic">Taxus globosa</Emphasis> |
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Authors: | Liliana Muñoz-Gutiérrez J Jesús Vargas-Hernández Javier López-Upton Marcos Soto-Hernández |
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Institution: | (1) Campus Montecillo, Colegio de Postgraduados, Km. 36.5, Carretera México-Texcoco, 56230 Montecillo, Mexico State, Mexico |
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Abstract: | Taxus globosa (Mexican yew) is a conifer endemic to México and Central America. It produces a substance known as taxol, which is useful
in treatment of ovarian cancer. Because seed production for this dioecious tree is limited, and seed germination is extremely
difficult, the use of cuttings could facilitate propagation of this species. With the intention of massively propagating individuals
selected for taxol content, two trials were established in which the effect of substrate temperature (average temperatures
18 and 23°C), age (i.e., young vs. old shoots) and management of cuttings, as well as clone variation in rooting capacity,
were evaluated. Low temperature favored rooting (53 vs. 34% on average for the two trials); younger shoots rooted three times
(61 vs. 23%) more than mature ones, while basal wounding did not affect rooting capacity. A wide variation was found in rooting
capacity of clones (8–76%), which could be associated with genetic or physiological differences among donor trees. |
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Keywords: | Age of cuttings Cloning Genetic variation Rooting capacity Substrate temperature Yew |
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