Wahua Et Al


Wahua et al

Journal of  Agricultural Sciences

Vol. 3 (12), pp.
December 2013.

 ISSN: 2276-7770 



Manuscript Number: 111713966


Comparative Taxonomic Studies on
Solanum aethiopicum
Linn. and Solanum nigrum
Linn. (Solanaceae)


Chika Wahua1,
Sele Mercy Olaleye2*


of Plant Science and Biotechnology, University of Port
Harcourt, Choba.

of Forestry and Wildlife Management, University of Port
Harcourt, Choba.


*Corresponding Author’s Email: sele.olaleye @ yahoo.com


The study
presented the comparative micro- and macro-morphological,
anatomical and cytological properties of Solanum
Linn. and Solanum nigrum Linn.
Predominantly found in the wild in the Niger Delta Tropics,
Nigeria. They are used as wild vegetable and medicine. Their
habits are annual sub-woody plants which attain up to 120cm
and 59cm or more in height respectively. The leaves are
petiolate and simple, ovate measuring up to 10±5 cm in
length and 7±3cm wide for S. aethiopicum while S.
is 7±3cm in length and 4±1.5cm broad with
alternate phyllotaxy. Stalked solitary axilliary flowers are
present in both. The petals are yellowish and sepals
greenish. The greenish berry fruits measure up to 1.2±0.4cm
in length for both species, when ripe is reddish and
blue-black respectively. The epidermal studies reveal
anisocytic stomata whereas the trichomes are simple
uniseriate form and stellate type respectively. The anatomy
of mid-ribs and petioles showed bicollateral vascular
systems. There are 3 vascular traces and node is unilacunar
in each species, the stems have 5 to 6 vascular bundles. The
cytological studies showed a diploid chromosome number of
2n=24 for S. aethiopicum while S. nigrum is a
polyploidy (tetraploid) with 2n=4x=48.

Morphological, Anatomical, Cytological, Studies.

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