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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Anatomical variations in scapes of Eleocharis minima Kunth (Cyperaceae, Poales) - amphibian and Kranz species

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Author(s):
Shirley Martins [1] ; Vera Lucia Scatena [2]
Total Authors: 2
Affiliation:
[1] Universidade Estadual do Oeste do Paraná. Centro de Ciências Biológicas e da Saúde - Brasil
[2] Universidade Estadual Paulista. Inst. Biociências. Depto. Botânica - Brasil
Total Affiliations: 2
Document type: Journal article
Source: Rodriguésia; v. 66, n. 2, p. 627-631, 2015-06-00.
Abstract

Abstract In Cyperaceae about 1/3 of the species have Kranz anatomy and some species of Eleocharis can either present Kranzanatomy or not according to the environmental conditions, whether terrestrial (emerged) or aquatic (partly or fully submerged). Eleocharis minima has emerged and submerged scapes in the same individual. To identify the possible differences and their correlation with the environment, the anatomy of these scapes was investigated. The emerged scape is quadrangular e has four vascular bundles, and the submerged is triangular with three bundles. Both scapes (emerged and submerged) show non-Kranz anatomy in the basal region and Kranz anatomy of the eleocharoid type in the median region. In the apical region of submerged scapes occur Kranz anatomy of eleocharoid types, but in this same region of the emerged scape was observed variations in the continuity of the inner bundle sheath and may be interpreted as eleocharoid or chlorocyperoid types. The plasticity of the Kranz anatomy in Eleocharis minima and in other species of the genus is probably related to the amphibious habit. Therefore, the use of characters related to Kranz anatomy in Eleocharis in phylogenetic and evolutionary approaches should be restricted and carefully analyzed in view of its plasticity. (AU)

FAPESP's process: 08/09380-2 - Ontogeny and ultrastructure of Kranz anatomy in Brazilian species of Cyperaceae: subsidies to taxonomy and phylogeny
Grantee:Shirley Martins Silva
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 11/18275-0 - Anatomy of species of Poales (monocotyledons): taxonomic implications
Grantee:Vera Lucia Scatena
Support Opportunities: Regular Research Grants