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Anatomía caulinar y del leño de Serjania laruotteana (Sapindaceae)

Authors: Pipo, M. Laura; Bodnar, Josefina; Beltrán, Marisol;

Anatomía caulinar y del leño de Serjania laruotteana (Sapindaceae)

Abstract

Serjania laruotteana Cambess. (Sapindaceae) es una liana que habita las selvas de Brasil, Paraguay y Argentina (Misiones y Corrientes). Como muchas sapindáceas de hábito lianescente, presenta un cilindro vascular compuesto en sus tallos. Este tipo de patrón caulinar ha sido objeto de varias interpretaciones tanto en los términos descriptivos como en los procesos de desarrollo. Con el objetivo de aportar al conocimiento de la anatomía del sistema vascular y el leño de las sapindáceas lianescentes, en este trabajo se analizó macro y microscópicamente los tallos de la especie Serjania laruotteana. Esta especie se caracteriza por poseer una corteza externa áspera de color castaño con ritidoma persistente. El cilindro vascular es de tipo compuesto, conformando una estructura en “cable”, con un cilindro mayor central y de 3 a 7 cilindros periféricos, de menor tamaño, que se disponen a ambos lados del cilindro central con un patrón en forma de “pie”. La médula es triangular en el cilindro central y en los otros de forma alargada. Los elementos axiales tienen una disposición sinuosa formando un grano crespo. Microscópicamente, el leño no presenta anillos de crecimiento demarcados, posee porosidad difusa, dimorfismo en vasos (vasos grandes solitarios o dispuestos en pares tangenciales y vasos angostos en múltiples largos de hasta 15 células), fibras y fibrotraqueidas. El parénquima axial es apotraqueal difuso agregado y paratraqueal escaso, en series longitudinales con un cristal por célula. Los radios son heterogéneos y altos, compuestos por células cuadradas, procumbentes y erectas con contenidos de color castaño rojizo, con predominio de las primeras. Además de la estructura en “cable”, esta especie muestra otras estrategias para el hábito lianescente, como el dimorfismo de vasos, la abundancia de almidón y el grano crespo. El último carácter aumentaría la plasticidad de sus tallos, evitando la fractura de los mismos y haciéndola más exitosa.

Serjania laruotteana Cambess. (Sapindaceae) is a liana that inhabits the forests of Brazil, Paraguay and Argentina (Misiones and Corrientes provinces). As many lianas of the family, it presents a compound vascular system in their stems. This type of stem pattern has been subject to several interpretations, both in descriptive terms and in development processes. In order to contribute to the knowledge of the vascular system and the wood anatomy of lianas of Sapindaceae family, this paper analyzed macro and microscopically the stems of Serjania laruotteana. This species is characterized by a brown and rough outer bark with persistent ritidoma. The vascular cylinder is of the compound type, forming a “cable” structure with a larger central cylinder and 3 to 7 smaller peripheral ones placed on both sides of the central cylinder. This pattern acquires “foot” morphology. The pith is triangular in the central cylinder and elongated in the peripheral ones. The axial elements have a winding arrangement forming a wavy grain. Microscopically, the secondary xylem lacks of distinct growth rings, is diffuse-porous, and presents dimorphism in vessels (large vessels or lone pairs arranged in tangential and narrow vessels in multiple lengths up to 15 cells), fibers and fiber-tracheids. The axial parenchyma is apotracheal diffuse-in-aggregates, and scarce paratracheal, in longitudinal series with a crystal per cell. The radios are heterogeneous and high, composed of square cells, procumbent and upright with reddish brown contents, with predominance of the first ones. Besides the “cable” structure, this species exhibits other strategies for liana habit, e.g. vessel dimorphism, starch abundance and wavy grain. The last character would increase the plasticity of their stems, preventing fracture thereof and making it more successful.

Fil: Pipo, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina

Fil: Bodnar, Josefina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Fil: Beltrán, Marisol. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina

Country
Argentina
Keywords

Liana, grano crespo, Botánica, Botany, Plant culture, SB1-1110, xilema, Variante cambial, Grano crespo, https://purl.org/becyt/ford/1.6, QK1-989, Ciencias Naturales, Xilema, https://purl.org/becyt/ford/1, variante cambial

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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