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Abstract Detail


Solanum Taxonomy - Morning

Zafar, Siddiq [1], Roheena, Muneer [1].

A study on the differences in morphological characters of Solanum nigrum L. complex.

PRESENT study was carried out to know the reality of different forms of S. nigrum L. growing in GCU Botanic Garden, their morphological characters and seasonal behaviors were studied. This study revealed that there were five different morphologically varied forms of S. nigrum L. in GCU Botanic Garden. Subsequently it was found that these are actually the different species of S. nigrum complex or section Solanum. S. nigrum L. is not a single species but actually a broad and taxonomically complex term including many species. These species constitute a polyploidy series with diploid, tetraploid and hexaploid species. Five species (S. villosum Mill. S. nigrum L., S. americanum Mill., S. chenopodioides Lam. and S. retroflexum Dun.) were identified only in the area of GCU Botanic Garden with the help of “key to the species of Solanum L. section Solanum” by Edmonds and Chweya (1997) because information about S. nigrum complex was not available in our local floras and keys and they were failed to explain reality of these species. Stomata and trichomes of leaf epidermis were also studied to make the comparison among species under study and found that each species has different type and degree of pubescence but stomata are of similar type. It was concluded that all five species of complex are similar and therefore confusing. They showed great similarity in gross morphology among members and some variation in their life cycles in different seasons. However, only few morphological characters helped us in separating the species of complex as each species has a high degree of phenotypic plasticity, particularly in their vegetative features, which are being affected by environment and genetic race.


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1 - Government College University Lahore,Pakistan, Botany, Government College University Lahore,Pakistan, Lahore, Punjab, 54000, Pakistan

Keywords:
Solanum nigrum complex
Solanum taxonomy.


Session: SAT02-15
Location: Hall of Ideas Room F/Monona Terrace
Date: Wednesday, July 26th, 2006
Time: 11:45 AM
Abstract ID:21


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