Wahua Et Al

Wahua et al



Greener
Journal of  Agricultural Sciences


Vol. 3 (12), pp.
849-855,
December 2013.


 ISSN: 2276-7770 



Research

Paper

Manuscript Number: 111713966

 


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

 


Chika Wahua1,
Sele Mercy Olaleye2*

 


1
Department
of Plant Science and Biotechnology, University of Port
Harcourt, Choba.


2
Department
of Forestry and Wildlife Management, University of Port
Harcourt, Choba.

 


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

Abstract:

The study
presented the comparative micro- and macro-morphological,
anatomical and cytological properties of Solanum
aethiopicum
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.
nigrum
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.

Keywords:
Morphological, Anatomical, Cytological, Studies.


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