Stomata in Solanum (dicots)


Ethno-Botanical Study of some Solanum L. Species with Reference to Foliar Micromorphology and Wood Elements

by Choudhury S., Rahaman C. H., Mandal S. (2015)

Department of Botany, Visva Bharati, Santiniketan, India

Sutapa Choudhury,

Chowdhury Habibur Rahaman, Department of Botany, Visva Bharati, Santiniketan, India
Sudhendu Mandal, Department of Botany, Visva Bharati, Santiniketan, India

in Int.J.Curr.Microbiol.App.Sci (2015) 4(8): 582-596 –,%20et%20al.pdf



The present work was undertaken to explore the ethno-botanical resources of Birbhum district of West Bengal as well as to evaluate the epidermal micromorphology and wood element characters of four medicinally important species of the genus Solanum.

It includes the detailed studies of leaf epidermal micromorphology and stem xylem elements characters of Solanum nigrum Linn., Solanum sisymbrifolium Lamk., Solanum torvum Swartz., and Solanum viarum Dunal.

The investigations were carried out using the fresh plant parts. The fresh leaf showed the epidermal cells are irregular in shape and the outline of the cells varies from straight to wavy.

Stomata are amphistomatic in all the cases and mainly of anisocytic type mixed with few anomocytic stomata.

Trichomes are both nonglandular and glandular types. Nonglandular types are unicellular or multicellular, uniseriate or stellate, present in both the epidermal layers. Glandular trichomes are globose, unicellular to multicellular, stalked, present in upper or lower as well as in both surfaces.

The range of stomatal index varies from 13 to 22. The palisade ratio varies from 7 to 11. By comparative wood element study of these four taxa, vessels, tracheids and fibres with some distinctive features are also found. The vessel elements number ranges from 11.01 to 33.03 / mm2 . The number of tracheids varies from 22.02 to 44.05 /mm 2 and fibres from 33.03 to 66.07 /mm 2 .

This study will be very helpful to herbalists and pharmacologists for proper evaluation and validation of folk drug.


Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

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