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Morphological studies on flowering plants (Solanaceae)

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Jagatheeswari D.

International Letters of Natural Sciences

2014

tom 10

In the present study, the morphological features of 20 taxa of the family Solanaceae were studied. The Solanaceae, or nightshades, are an economically important family of flowering plants. The family ranges from herbs to trees, and includes a number of important agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxic, but many cultures eat nightshades, in some cases as staple foods. The present observation shows that majority of Solanaceae members almost the same morphological features that of the family.

Cytological investigation of Brazilian nightshade (Solanum seaforthianum Andr.)

100%

Jagatheeswari D.

International Letters of Natural Sciences

2014

tom 10

Solanum genus namely Solanum seaforthianum Andr. belongs to the Solanaceae family, and comprises only dioeciously species. These plants are distributed between 29º and 40º south. All species of this genus are diploid with chromosome numbers of 2n = 24, 28 and 30. According to literature, the basic chromosome number in this genus is x = 12, 14 and 15. Solanum genus with a chromosome complement of 2n = 30 has a symmetric karyotype with a median and sub median centromere position. Because ancestral species have a symmetric karyotype, it seems that x = 12 is the initial basic chromosome number in this genus and the x = 14 and x = 15 derived from x = 12. So it seems that diploid phenomena played an important role in evolution and speciation.

Ograniczanie wyników

2 International Letters of Natural Sciences

2 Jagatheeswari D.

2 2014

Wyniki wyszukiwania

Morphological studies on flowering plants (Solanaceae)

Cytological investigation of Brazilian nightshade (Solanum seaforthianum Andr.)