Browsing by Author "Orrego, Fabiola"

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    A novel fast-vegetative propagation technique of the pioneer shrub Baccharis linearis on mine tailings by adding compost
    (TAYLOR & FRANCIS INC, 2021) Ginocchio, Rosanna; Maria de la Fuente, Luz; Orrego, Fabiola; Jose Diaz, Maria; Baez, Javiera; Francisco Ovalle, Juan
    Interest in Baccharis linearis has increased as an alternative for assisted phytostabilization due to its spontaneous colonization of tailings dumps. The search for a novel fast-vegetative propagation technique to accelerate its coverage on mine tailings is a promising research area for sustainable mine closure plans. In this study, we determined the optimal proportion of compost and tailings as growing media to promote fast B. linearis propagation through a compound layering technique. The assessed growing substrates were: 100% tailings, 70% tailings + 30% compost, and 50% tailings + 50% compost. After 84 days of growth, the change in number and height of layering branches, root and shoot dry mass, percentage of ground coverage, and substrate chemical properties were assessed. The main results showed that compound layering of B. linearis is possible with compost addition. The growth of new roots and layering branches was significantly improved by either 30% or 50% compost addition into tailings, due to chemical improvements of substrate (higher nutrients and pH and decreased copper bioavailability). The study confirms that the compound layering of B. linearis may be an effective and novel technique for speeding the reclamation of post-operative mine tailings, which is improved by the incorporation of compost.
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    Decoupled evolution of foliar freezing resistance, temperature niche and morphological leaf traits in Chilean Myrceugenia
    (2014) Perez, Fernanda; Hinojosa, Luis F.; Ossa, Carmen G.; Campano, Francisca; Orrego, Fabiola
    1. Phylogenetic conservatism of tolerance to freezing temperatures has been cited to explain the tendency of plant lineages to grow in similar climates. However, there is little information about whether or not freezing resistance is conserved across phylogenies, and whether conservatism of physiological traits could explain conservatism of realized climatic niches. Here, we compared the phylogenetical lability of realized climatic niche, foliar freezing resistance and four morphological leaf traits that are generally considered to be adaptations to frost resistance in the Chilean species of Myrceugenia, which grows in a wide range of habitats.
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    Diversidad de halófitas chilenas: distribución, origen y hábito
    (2018) Orrego, Fabiola; de la Fuente, Luz María; Gómez, Miguel; Ginocchio Cea, Rosanna