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vol.37 número5Variación en la concentración de flavonoides y clorofila, y cambios en la morfología y anatomía foliar, debidos a radiación visible (PAR) o ultravioleta (UVA, UVB) en Baccharis LatifoliaExtracción, separación, e identificación del carotenoide y xantófilo neoxantina por HPLC-MS de la especie alimentica inga ingoides (RICH) willd, pacay, colectada en Coroico, Bolivia índice de autoresíndice de materiabúsqueda de artículos
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Revista Boliviana de Química

versión On-line ISSN 0250-5460

Resumen

NINA, Ruth et al. Measurement of morphological and biomass changes, and of the oxalic acid contents, after IR and UV radiation in Oxalis Triangularis. Rev. Bol. Quim [online]. 2020, vol.37, n.5, pp.223-232. ISSN 0250-5460.

Abstract In the face of climate change, the effect of solar radiation on morphology, biomass and different chemical compounds present in plants is of interest for food security. The present study seeks to contribute to knowledge of the effect of infrared (IR) and ultraviolet (UV-A, UV-B) radiation on oxalic acid concentration, biomass and morphology in Oxalis triangularis (Oxalidaceae). The species was exposed to visible light with IR, UV-A or UV-B radiation separately and a control group exposed only to visible light was established. Five weeks later, the number of leaves was counted and morphological changes were observed. Also, fresh and dry weights of leaves and rhizomes were obtained from each specimen, and the quantification of oxalic acid was performed using UV/Visible spectrophotometry. The results show that biomass, height and number of leaves increase with exposure to infrared radiation, while no significant differences in these parameters are found with UVA radiation. With UVB radiation, a depigmentation of the leaflet and a certain glossiness of the leaflets due to a probable increase in waxes and a decrease in petiole height were observed. With respect to oxalic acid concentration, no significant differences were observed with the different treatments, although a tendency to decrease with IR and increase with UVB was seen. These findings may have implications for the nutritional value of plants containing oxalic acid, for this reason further studies are needed.

Palabras clave : Oxalic acid; Biomass; Oxalis triangularis; Infrared radiation; Ultraviolet radiation.

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