Abstract
Total amount of soluble seed protein along with its protein profile of nine species of Solanum was investigated through SDS-PAGE. S. nigrum and S. macranthum contain maximum and minimum amount of total soluble seed protein per gm of tissue respectively. A dendrogram based on Jaccard's similarity index and also on the basis of presence and absence of peptide bands revealed two major clusters- upper cluster (UC) and lower cluster (LC). Both the clusters are again sub-divided in two sub-clusters like UC1, UC2 and LC1, LC2. S. nigrum being evolutionary more closely (91%) related to S. villosum than S. americanum, has been placed in UC1 while S. americanum along with S. sisymbriifolium, S. macranthum and S. torvum are placed within UC2. S. indicum and S. erianthum showed close resemblance and are placed in LC1 while LC2 contains only S. xanthocarpum, which shows least similarity with other studied species of Solanum and thus occupies a distinct place on the dendrogram. Based on these results, the genus Solanum can be divided into two sub genera and the distribution pattern of these species in the two sub genera does not corroborate with the conventional classification. The present study thus provides useful information for the identification of the taxa, their relationship and delimitation of their taxonomic status. So, this omega taxonomical approach may be very much beneficial for future proteomics study.
Highlights
Solanum is one of the most economically valuable genera among the 98 genera of ‘nightshade’ family Solanaceae; which contains approximately 2700 species [1]
A total of 40 major polypeptide bands of different sizes were resolved in nine selected species after SDS-PAGE of total soluble seed proteins
S. xanthocarpum and S. villosum exhibited a greater number of bands (6); and least number of bands (3) were observed in S. sisymbriifolium and S. indicum
Summary
Solanum is one of the most economically valuable genera among the 98 genera of ‘nightshade’ family Solanaceae; which contains approximately 2700 species [1]. Members of this genus are distributed throughout the world, especially in tropical and worm temperate regions, among which largest sub-genus Leptostemonum or ‘spinous Solanum’ are predominant in India wildly [2]. The genus is important for its food value and valuable for its pharmaceutical demands. More than hundreds of pharmaceutically important alkaloids are found in different wild and cultivated species of Solanum such as solasodine, solasonine, solamargine, solanidine etc. That is why most of the species are used as analgesic, antinarcotics, Evaluation of Phylogenetic Relationships of Some Medicinally Important
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