Anatomía caulinar y del leño de Serjania laruotteana (Sapindaceae)
Pipo, M. Laura; Josefina Bodnar; Marisol Beltrán. 2016. “Stem and wood anatomy of Serjania laruotteana (Sapindaceae)”. Lilloa 53 (2) . 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 knowl- edge 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 char- acterized 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 dif-fuse-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 abun- dance and wavy grain. The last character would increase the plasticity of their stems, pre- venting fracture thereof and making it more successful.
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| Format: | Digital revista |
| Language: | spa |
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Fundación Miguel Lillo
2016
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| Online Access: | http://www.lillo.org.ar/journals/index.php/lilloa/article/view/116 |
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| Summary: | Pipo, M. Laura; Josefina Bodnar; Marisol Beltrán. 2016. “Stem and wood anatomy of Serjania laruotteana (Sapindaceae)”. Lilloa 53 (2) . 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 knowl- edge 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 char- acterized 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 dif-fuse-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 abun- dance and wavy grain. The last character would increase the plasticity of their stems, pre- venting fracture thereof and making it more successful. |
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