ResumenSe describe la anatomía de las raíces aéreas cortas de Oenocarpus bataua que surgen desde la base del tallo hasta aproximadamente 80 cm por encima del nivel del suelo, comparando esta estructura entre especímenes a diferentes distancias de sus ápices y entre las raíces de primer y segundo orden. Las muestras fueron colectadas en Zamora Chinchipe (Ecuador). Se obtuvieron secciones transversales, longitudinales y macerados utilizando técnicas clásicas. Las raíces estudiadas no contienen tejido meristemático en el ápice. Las principales variaciones entre individuos son la presencia de elementos traqueales medulares aislados y endodermis profundamente lobulada en las raíces de primer orden más gruesas. Otras diferencias se encontraron en la exodermis y la corteza externa entre individuos, en términos de ausencia, presencia o variaciones en el número de capas celulares y engrosamiento de paredes, mientras que la estructura de la corteza interna se observó más constante. A distintos niveles desde el ápice, las raíces de primer orden muestran esclerificación centrífuga del tejido fundamental que rodea al tejido vascular. Las raíces de segundo orden tienen una anatomía más simple y menos variable. Palabras clave: Arecoideae, estructura vegetativa, histología, palma. AbstractThe anatomy of aerial short roots of Oenocarpus bataua that arise from the stem base up to approximately 80 cm from above ground level is described, comparing this structure between individuals at different distances from the apex and between primary and secondary roots. Samples were collected in Zamora Chinchipe (Ecuador). Transverse, longitudinal sections and macerates were made using classic techniques. The studied roots lacked apical meristematic tissue. Principal variations between individuals are the presence of medullar isolated tracheary elements and deep lobulated endodermis in thicker primary roots. Another differences between individuals are found in the exodermis and outer cortex in terms of absence, presence or variation on the number of cell layers and wall thickening, while the structure of the inner cortex showed more constancy. At different levels from the apex, primary roots show centrifugal sclerification of the fundamental tissue bordering the vascular tissue. Secondary roots have a simpler and less variable anatomy.
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