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Yemas de Ugni molinae. Extremos distales de brotes en invierno. Abreviaturas= y.ap.: yema apical; y.ax.: yema axilar. Escalas= A: 1 cm, B: 5 mm.
Source publication
Introducción y objetivos: Ugni molinae (Myrtaceae) es una especie arbustiva nativa del sur de Chile − donde se la conoce como “murta” o “murtilla” − y de Argentina. Este estudio tiene como objetivo aportar información morfo-arquitectural de U. molinae, y así promover su cultivo e introducción en sistemas productivos de Argentina. M&M: Se realizaron...
Contexts in source publication
Context 1
... secuencia linear de primordios de entrenudos, nudos y nomofilos; estas yemas no presentan hojas modificadas (catafilos) formando la cubierta externa. Los primordios de hojas que componen una yema apical se desarrollan en nomofilos al producirse la brotación, de modo que las yemas apicales de esta especie pueden ser descriptas como yemas desnudas (Fig. 3A). El aspecto externo de las yemas apicales es marcadamente variable debido a la dificultad en definir de forma objetiva cuáles son las hojas más distales de un brote y cuáles son los primordios más proximales de la yema apical de ese brote. Las yemas axilares difieren de las yemas apicales por el hecho de que los primordios del nudo ...
Context 2
... en definir de forma objetiva cuáles son las hojas más distales de un brote y cuáles son los primordios más proximales de la yema apical de ese brote. Las yemas axilares difieren de las yemas apicales por el hecho de que los primordios del nudo proximal de una yema axilar, los profilos, cubren por completo a los restantes primordios de esa yema (Fig. 3B). Los profilos son notablemente más pequeños y consistentes que los nomofilos próximos a ellos, razón por la cual se los puede describir como catafilos, y a las yemas axilares como yemas ...
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Citations
... Such a plant is a wild evergreen shrub (height: 1-2 m) and is seen growing between the Maule and Aysén regions (central southern Chile), near the coastal and pre-Andean mountains. Its fruits are small globular berries (in average around 1 cm in diameter, weighing less than 1 g and containing few tens of seeds), with a pleasant smell and taste and show a high degree of variability with respect to its colour and size (Torres et al., 1999;Schreckinger et al., 2010;Augusto et al., 2015;López et al., 2018;Guenuleo et al., 2020;Neranzi et al., 2022). ...
Recently, a growing interest in fruits having a high content of health-promoting compounds has become a trend among consumers around the world. Wild berries have received special attention based on the high levels of healthy compounds present in them. In this work, we elaborate on the qualities of the murta ( Ugni molinae Turcz) fruit such as the colour, the volatile organic compounds (VOCs) present, its antioxidant capacity and the phenolic compound content (including those of flavonols and anthocyanins) with respect to the different ripening stages. Four stages were established based on the skin colour parameters, which were consistent with the changes in the weight and size of the murta fruits. In addition, the total phenolic and flavonols content showed a decrease during fruit ripening, in contrast with the total anthocyanins content that increased at the final stages of ripening. Additionally, the antioxidant capacity was evaluated via two approaches: ferric reducing antioxidant power and 1,1-diphenyl-2-picrylhydrazyl discolouration assay; higher levels of antioxidants at the final stages were consistently observed. Furthermore, the VOCs profile showed terpenoids to be the main compounds, with the highest relative abundances in fully ripe fruits. These results allow us to propose a classification of the different ripening stages of the murta fruits. This would enable us to have better knowledge of this interesting fruit, which possesses highly healthy nutraceutical compounds.
... In each occasion, we cut the distal end (10-60 cm long) of one to four of the major axes of one to three plants, making sure that the most recently-extended axis portion (hereafter referred to "shoot") was entirely sampled. In the species of Myrtaceae from Patagonia, the limit between shoots of the same axis extended in two successive years may be recognized by the presence of one or more of the following morphological markers: a short internode, relatively small leaves in one of the nodes close to the short internode, and branches derived from the node located proximally with respect to the short internode (Puntieri et al. 2018;Guenuleo et al. 2020;Fig. 1A). ...
... For some of the shoots that we analyzed after the end of their primary growth, the most recently extended internodes had a continuous epidermis and a broad and non-suberified cortex, as the periderm was still undeveloped. This could mean greater sensitivity to low temperatures (Lenz et al. 2016;Montgomery et al. 2020), and justify the apex deaths reported for some shoots in some of these species (Puntieri et al. 2018;Guenuleo et al. 2020). It can be hypothesized that the number of internodes of a distal shoot that would be affected by low temperatures would depend on the level of development reached by the periderm. ...