Vegetative anatomy of Tabernaemontana alternifolia L. (Apocynaceae) endemic to southern Western Ghats, India

Seenu, Yuvarani and Ravichandran, Koshila Ravi and Sivadas, Anaswara and Mayakrishnan, Balachandar and Thangavelu, Muthukumar: Vegetative anatomy of Tabernaemontana alternifolia L. (Apocynaceae) endemic to southern Western Ghats, India. In: Acta Biologica Szegediensis, (63) 2. pp. 185-193. (2019)

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Abstract

The anatomical description of vegetative parts of Taberenaemontana alternifolia L. belonging to the family Apocynaceae was investigated in the present study. The leaves of T. alternifolia is hypostomatic with paracytic stomata, uniseriate epidermis made up of thin-walled parenchymatous cells covered by thin cuticle on both adaxial and abaxial surfaces. The hypodermis comprises of angular collenchyma cells. Mesophyll is dorsiventral containing silica bodies and vascular bundles are bicollateral. The petiole is flattened adaxially and arch-shaped abaxially with a uniseriate epidermis covered by a thin cuticle. The hypodermis is 7-8 layered angular collenchyma cells consisting of laticifers and parenchymatic, cortical layers consisting of silica bodies and thick-walled fibers and U-shaped bicollateral vascular bundles. Secondary growth in stems is characterized by the formation of periderm and thick-walled fibers in the vascular tissues. Bicollateral vascular bundles are covered by sclerenchymatous patches, parenchymatous cortex and pith consist of fibers, laticifers and silica bodies. The root possess unicellular root hairs, compactly arranged thin-walled uniseriate epidermis, 16-18 layered cortex containing silica bodies and fibers, indistinct endodermis, radially arranged vascular bundles and 14-16 arched xylem. Pitted water-storage cells are present in the conjunctive tissue. Lignin deposition was observed in the root stelar region and pith is absent.

Item Type: Article
Journal or Publication Title: Acta Biologica Szegediensis
Date: 2019
Volume: 63
Number: 2
ISSN: 1588-4082
Page Range: pp. 185-193
Publisher: University of Szeged
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/69553/
DOI: https://doi.org/10.14232/abs.2019.2.185-193
Uncontrolled Keywords: Növénytan
Additional Information: Bibliogr.: p. 191-193. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.06. Biological sciences
Date Deposited: 2020. Jul. 27. 13:28
Last Modified: 2020. Jul. 27. 13:28
URI: http://acta.bibl.u-szeged.hu/id/eprint/69602

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