Leaf Architecture in the Seedling of Wrightia arborea (Dennst.) D.J. Mabberley

Authors

  • Patel Kailash P.   Department of Biosciences, V.N.S.G University, Surat, Gujarat, India

Keywords:

Leaf architecture, seedling, Tracheid, Wrightia arborea.

Abstract

Wrightia arborea (Densst.) Mabb. belonging to the family Apocynaceae, is a small deciduous tree, distributed throughout the warmer parts of India. Different organs (root, bark and leaf) have been used in traditional medicine for many years. The present study was undertaken to investigate the Leaf architecture including venation pattern in the seedlings of Wrightia arborea (Densst.) Mabb. of the Apocynaceae. The Leaves are simple, opposite, estipulate; petiole 3-7 mm, stout, tomentose; lamina 6-15 x 3-6.5 cm, elliptic, elliptic-ovate, ovate or obovate; base acute; apex acuminate; margin entire, tomentose on both sides, chartaceous; lateral nerves 9-13 pairs, tomentose, prominent, pinnate; intercostae reticulate. The major venation pattern conforms to pinnate camptodromous type with festooned brochidodromous secondaries. The qualitative and quantitative features are studied. The leaf size, areole size, number of vein endings entering the areoles and number of vein terminations entering the areoles were studied. The highest degree of vein order is observed up to 5°. Isolated tracheids, isolated vein endings, isolated free vein endings and tracheoidal elements are noticed. Loops may be formed by vein-lets only or by vein-lets and tracheids. The terminal tracheids of vein endings show an increase in cell diameter are of various shapes and occur single or in groups of 2 - 3 or more per vein-let terminus. The primary and secondary veins are surrounded by a multiseriate bundle sheath and vein-lets and vein endings have uniseriate sheath.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2015-05-30

Issue

Volume 1, Issue 3, May-June-2015

Section

Research Articles

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How to Cite

[1]
Patel Kailash P. , " Leaf Architecture in the Seedling of Wrightia arborea (Dennst.) D.J. Mabberley, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 1, Issue 3, pp.432-439, May-June-2015.