Abstract

HERNANDEZ, Marcelo et al. Micrographic foliar parameters and histochemistry in the identification of twelve medicinal climbing plants of the Río de la Plata area (Argentina). Lilloa [online]. 2019, vol.56, n.1, pp.23-53. ISSN 0075-9481.  http://dx.doi.org/10.30550/j.lil/2019.56.1/3.

The aim of this paper was to get qualitative and quantitative leaf micrographic characters and to test chemical compounds to characterize the species in order to facilitate the identification of taxa from whole or fragmented samples of them. Fresh material was collected in the study area, and herbarium specimens (LP, LPAG) were analyzed. For the anatomical and histochemical preparations we proceeded with usual techniques for optical microscopy. Histochemical analysis to recognize starch, mucilage, lipophilic substances, and tannins were performed. The main differential micrographic features were: type, distribution and position of stomata and stomatal index; trichomes type and density; middle vein shapes in transection; vascular bundle type; mesophyll type; secretory structures; type of crystals and characteristics of the petiole in transection. Comparative tables and a dicotomic key using micrographic characters were generated as a tool for botanical quality control

Keywords : Anatomy; climbing plants; histochemistry; leaves; lianas.

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