MORPHO ANATOMICAL STUDIES OF LEAVES OF Urena ... - IJPI

INTERNATIONAL JOURNAL OF
RESEARCH ARTICLE
PHARMACEUTICAL INNOVATIONS ISSN 2249-1031
sclerenchyma cells both on the outer and
inner phases of each vascular bundle (Fig
5B). The petiole along the distal region in
quite different from the basal part. It is
perfectly circular in cross selection with
stellate trichomes at certain places (Fig
5A). The epidermis is followed by
homogeneous parenchymatous tissue.
Some of the parenchyma cells are
tanniferous.The vascular tissues are
organized in to a continuous cylinder
enclosing sclerenchymatous pith. Xylem
elements occur in radial rows and phloem
occurs in continuous zone with peripheral
phloem fibers (Fig 5A).
Fig.4 Leaf paradermal section of
stomata
A: - Leaf paradermal section showing
stomata,
B: - Leaf paradermal section showing
stomata and epidermal trichomes.
Ec; Epidermal cell, ETr: Epidermal cells
of the Trichomes, St: Stomata
Anatomy of the Petiole
Structure of petiole at distal and proximal
parts were studied .Along the proximal
region is dorsiventrally differentiated .The
adaxial side is shallowly concave and the
abaxial side is circular (Fig 5A).The
epidermis is followed by 2 or 3 layers of
collenchyma and the rest of the ground
tissue is parenchymatous. The vascular
strands are differentiated to abaxial
medium strand, three lateral stands and a
smaller adaxial strand. Each vascular
strand is collateral consisting of outer
phloem, inner xylem and a patch of
Volume 3, Issue 1, Jan. − Feb. 2013
Fig 5. Transverse Section of Petiole,
5 (A) Petiole Distal region,
5 (B) Petiole Proximal regions
Col:- Collenchyma, Ep:- Epidermis, GT:-
Ground Tissue, AdB:- Adaaxial Bundle,
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