Caracterización morfo-anatomía y aceites esenciales de Tagetes terniflora y Tagetes minuta (Asteraceae) de Tucumán (Argentina).

Abstract

Summary:The essential oil composition and morpho-anatomy of Tagetes minuta, collected at "El Mollar" and two different populations of Tagetes terniflora collected in Tafí del Valle (Tucumán, Argentina) were studied. The essential oil of aerial parts (flowers and leaves) from both species was analyzed by gas chromatography-mass spectrometry. Qualitative and quantitative differences were observed in the composition of the essential oil from both species. Oxygenated monoterpenes were the dominant compounds in the essential oil from both collections of T. terniflora where the main component was cis-tagetone (33.6% and 58.4% respectively) accompanied by significant amounts of the monotepene hydrocarbon cis-β-ocimene (17.1% and 17.4% respectively). cis-Tagetone (53.2%) was also a dominant component in T. minuta along with dihydrotagetone (10.4%) and cis-β-ocimene (19.9%). cis-and transocimenone were distinctive components of T. terniflora which were not detected in T. minuta. Anatomically stands out the presence of secretory cavities and glandular trichomes in foliar blades and secretory ducts in stems and petiole of both species.Key words: Tagetes terniflora, Tagetes minuta, essential oil, secretory tissues, morpho-anatomy.Resumen: Caracterización morfo-anatomía y aceites esenciales de Tagetes terniflora y Tagetes minuta (Asteraceae) de Tucumán (Argentina). Se estudió la composición del aceite esencial y morfo-anatomía de Tagetes minuta coleccionada en "El Mollar" y de dos poblaciones diferentes de Tagetes terniflora de Tafí del Valle (Tucumán, Argentina). El aceite esencial de las partes aéreas (flores y hojas) de ambas especies se analizó por cromatografía gaseosa-espectrometría de masa. Se observaron diferencias cuali-y cuantitativas en la composición del aceite esencial de ambas especies. En las dos colecciones de T. terniflora los compuestos dominantes del aceite esencial fueron monoterpenos oxigenados donde el componente principal fue la cis-tagetona (33.6% y 58.4% respectivamente) acompañado por cantidades significativas del hidrocarburo monoterpénico cis-β-ocimeno (17.1% y 17.4% respectivamente). La cistagetona (53.2%) fue también el componente dominante en T. minuta junto con dihidrotagetona (10.4%) y cis-β-ocimeno (19.9%). La cis-y trans-ocimenona fueron componentes característicos de T. terniflora que no fueron detectados en T. minuta. Anatómicamente se destaca la presencia de cavidades secretoras y tricomas glandulares secretores en los bordes foliares y conductos secretores en tallos y pecíolo de ambas especies.

Microscopic characterization of petiole anatomy of Asteraceous taxa of Western Himalaya‐Pakistan

“…Data on anatomy of the vegetative organ and palynology of reproductive organ in Asteraceae plants have been issued. Regardless of a wide P L A T E 3 Micrograph of petiole anatomy (5a = Cyanthillium cinereum, 6a = Helianthus annus), Field pics (5b = C. cinereum, 6b = H. annus) Lizarraga et al (2017) observed the secretory glandular trichomes on the leaf edges and on stems and petioles of T. minuta which is dissimilar to our findings where the absence of trichomes in petiole was observed. Uniseriate epidermis of T. officinale with cuticle has been observed just like the observation of Gier and Burress (1942) where he reported the epidermis of the stem is a single layer, cutinized wall but parenchymatous layers are 4 in number which is dissimilar to our studies (two layers).…”

“…Lizarraga et al (2017) observed the secretory glandular trichomes on the leaf edges and on stems and petioles of T . minuta which is dissimilar to our findings where the absence of trichomes in petiole was observed.…”

Chemical constituents of two Ecuadorian medicinal plants, Tagetes terniflora Kunth and Croton rivinifolius Kunth

“…This genus includes annual or perennial, erect and aromatic herbs with striated stems and pinnate leaves, and some shrubs; it is of great economic importance and includes species of edible and ornamental plants. Extracts of these species are characterized by their insecticidal and nematicidal (chemical pesticide) activity, in addition to their various pharmaceutical applications (Faizi et al, 2011;Lizarraga et al, 2017). The uses, biological activities as the major constituents present in their species are well documented (Tereschuk et al, 2003;Gupta and Vasuveda, 2012;Burlec et al, 2021).…”

Anatomía foliar de nueve especies de Tagetes L. (Tageteae: Asteraceae)

“…Hickey (1974) y Hickey & Wolfe (1975) señalan que los caracteres de la arquitectura foliar ayudan a esclarecer la taxonomía de las angiospermas. Al respecto existen diversos trabajos en angiospermas (Martínez 1984, Martínez-Millán & Cevallos-Ferriz 2005, Rodríguez-Rivera & Romero-Rangel 2007, Cervantes et al 2009; para México, en Asteraceae son escasos (Rojas-Leal et al 2014) y para Tagetes se resume en la inclusión de algunas especies en estudios comparativos sobre morfología y anatomía de la hoja (García-Sánchez et al 2012, Martínez et al 2013, Lizarraga et al 2017, Rivera et al 2019.…”

“…En Asteraceae, la anatomía foliar también ha contribuido a delimitar diferentes taxones (Lapp et al 2004, Milan et al 2006, Adedeji & Jewoola 2008, Bombo et al 2012, Lapp et al 2013, Rivera et al 2017. En el caso particular de Tagetes se citan solo algunos estudios de anatomía de raíz, tallo y hojas para caracterizar sus especies con fines taxonómicos (Visintin & Bernadello 2005, García-Sánchez et al 2012, Martínez et al 2013, Lizarraga et al 2017, Schiavinato & Bartoli 2018.…”