Anatomía del sistema caulinar subterráneo de Cyperus corymbosus var: subnodosus (Cyperaceae)

Abstract

RESUMENSe estudia la anatomía del sistema de ramificación subterráneo en Cyperus corymbosus Rottb. var. subnodosus (Nees et Meyen) Kük. Se describe la anatomía del rizoma y del tubérculo en este taxón. Se realiza un análisis comparativo de las variaciones observadas en diferentes estadios de desarrollo. Las características anatómicas de rizoma y tubérculos están asociadas al típico sistema caulinar subterráneo, a la forma de crecimiento de la especie y a su modo de propagación vegetativa.Palabras clave: Histología, rizoma, tubérculo, Cyperus corymbosus, Cyperaceae. ABSTRACTThe anatomy of the underground branching systems in Cyperus corymbosus Rottb. var. subnodosus (Nees et Meyen) Kük. was examined. The anatomy of the rhizome and tuber of this taxon. A comparative analysis of the variations observed in different development stages was also performed. The anatomical characteristics of the rhizome and tubers are associated with the typically underground shoot system, the growth form of the species and its mode of vegetative propagation.

Structure of the inflorescences of selected South American species of Abildgaardia Vahl, Bulbostylis Kunth, and Fimbristylis Vahl (Abildgaardieae-Cyperoideae-Cyperaceae)

“…In all species the inflorescences are polytelic (indeterminate), as in most Cyperaceae (Alves et al 2000;Heinzen and Vegetti 1994;Guarise and Vegetti 2008;Kukkonen 1984Kukkonen , 1986Vegetti 1992Vegetti , 1994Vegetti and Tivano 1991;Vrijdaghs 2006;Vrijdaghs et al 2003Vrijdaghs et al , 2004Vrijdaghs et al , 2005aVrijdaghs et al , 2005bVrijdaghs et al , 2007, and monocotyledonous (Alves 2000;Weberling 1985). The HF is always present, thus the inflorescences are heterothetic (Rua 1999), i.e., non-truncate.…”

“…In the PZ, the acropetal reduction of the order of ramification, number, and length of the paraclades is a common feature in the family (Browning and Gordon-Gray 1999;Haines 1966;Heinzen and Vegetti 1994;Kukkonen 1984Kukkonen , 1986Vegetti 1992Vegetti , 1994Vegetti , 2003Vegetti and Tivano 1991). The phyllotaxis of normal paraclades is similar to that observed by Guarise and Vegetti (2007) for Cyperus L.…”

“…Although several authors (e.g., Gordon-Gray 1971;Lye 1973) have questioned the use of inflorescence characteristics for morphological delimitations of taxa, research on inflorescence structure has clarified several morphological homology questions (Heinzen and Vegetti 1994;Guaglianone 1970; Guarise and Vegetti 2007;Mora-Osejo 1960, 1987Vegetti 1992Vegetti , 1994. In this sense, Troll's typology, enriched by the ideas of several authors, for example Weberling, Kukkonen, Rua and Vegetti, has proven useful for describing inflorescences (Mora-Osejo 1987;Rua 1999) and for providing characteristics with phylogenetic and taxonomic value (Aagesen 1999; Cavalcanti and Rua 2008;Guarise and Vegetti 2008;Liu et al 2005;Nickol 1995;Rua and Aliscioni 2002;Tortosa et al 2004).…”

Weeds Associated with Banana Crops in Magdalena Department, Colombia

“…In addition, by eliminating aerial vegetation, the underground growth points are stimulated, contributing to greater and constant weed propagation (Talaka and Rajab, 2013). These functional traits are present in Commelinaceae (Nisensohn et al, 2011) and Cyperaceae (Heinzen et al, 2010) families, increasing their competitive ability, explaining why species such as Commelina erecta and Cyperus odoratus are the most frequently found and disseminated weeds in banana plantations (Table 2).…”