Secretory duct distribution and leaf venation patterns of Aldama species (Asteraceae) and their application in taxonomy

Author(s)

Filartiga, Arinawa Liz ; Bassinello, Vanessa ; Filippi, Gustavo Mortean ; Bombo, Aline Bertolosi ; Appezzato-da-Gloria, Beatriz

• Document type: Journal article
• Source: BOTANY; v. 94, n. 12, p. 1161-1170, DEC 2016.
• Web of Science Citations: 2

Abstract

Features of leaf morphology such as secretory duct distribution and venation patterns are important taxonomical tools; however, some species can have variation in these traits. This study evaluates whether the secretory duct distribution in the midrib and venation is similar across different leaves of 17 Aldama species. Six fully expanded leaves (three each of the largest and smallest size) from five distinct plants were selected to analyze the duct distribution. The samples were histologically examined, and the quantitative data were statistically analyzed. The venation pattern was analyzed in five fully expanded leaves of different plants. In all, 23 secretory duct distribution patterns were identified; they showed intra-and inter-species variations except in Aldama anchusifolia (DC.) E.E.Schill. \& Panero and A. trichophylla (Dusen) Magenta. The largest number of ducts was not correlated with leaf and midrib dimensions (width and length). Further, Aldama venation could be divided into two groups: (1) pinnate camptodromous brochidodromous type (four species), and (2) acrodromous venation type and its basal and suprabasal variations (13 species). Thus, distinct secretory duct arrangements of the midrib might assist in the discrimination of Aldama species. The venation patterns were also important for distinguishing the majority of species selected. (AU)

• FAPESP's process: 12/02476-0 - Morpho-anatomical and essential oil analysis of four species of Aldama la Llave (Asteraceae: Heliantheae)
• Grantee: Arinawa Liz del Prado Filartiga
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/01586-6 - Anatomy and phytochemistry of Aldama La Llave (Asteraceae - Heliantheae)species
• Grantee: Aline Bertolosi Bombo
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/51454-3 - Morphoanatomical, metabolomic and molecular studies as subsidies to the systematic of Asteraceae species and access to their pharmacological potential
• Grantee: Beatriz Appezzato da Glória
• Support Opportunities: Research Projects - Thematic Grants