PHYTOCHEMICAL AND BIOLOGICAL STUDIES ON CERTAIN PLANTS BELONGING TO FAMILY BIGNONIACEAE
Nada Mohamed Mahmoud Mohamed Mostafa;
Abstract
Family Bignoniaceae includes 120 genera with 800 species mainly distributed within tropical floras of the world with lesser representation in temperate regions; however, some species are used worldwide as ornamentals. It consists mainly of woody trees, shrubs, and lianas (Yff et al., 2002; Da Silveira et al., 2012).
Bignoniaceae includes attractive ornamental flowering trees and lianas and produce hard and durable timbers, many pharmacologically active chemicals, various products used in local handicrafts, and even a few edible seeds and fruits (Pattnaik et al., 1997).
Many woody representatives of Bignoniaceae are well known for their use in the timber industry (e.g. Tabebuia, Cybistax, Paratecoma, Stereospermum, Parmentiera, Jacaranda, Catalpa) or as ornamentals (e.g. Jacaranda, Catalpa, Spathodea). Some genera occur mainly as lianas such as Pandorea and Macfadyena (Parker, 2008).
Chemical constituents recognized in the family are naphthoquinones of the lapachol type, iridoid glucosides, alkaloids, flavones, triterpenes, polyphenols, tannins and seed oils (Hegnauer, 1964; Gachet and Schuhly, 2009).
The genus Jacaranda, an important representative of the tribe Tecomeae in the family Bignoniaceae, is interesting from both biological and chemical perspectives. Jacaranda contains 49 species around the world that are native to Central and South America and the Caribbean. Out of the 49 Jacaranda species, 39 taxa are endemic to Brazil. Its main secondary metabolites identified are triterpenes, quinones, flavonoids, and acetosides. Members of this genus are well known in traditional ethnobotany for their pharmacological potential and promising activities, especially in the field of tropical diseases, skin problems and venereal infections (Gachet and Schuhly, 2009).
Genus Pyrostegia is a small but diverse genus of four species in the tribe Bignonieae (Bignoniaceae). The genus is native to South America, with P. venusta (Ker Gawl.) Miers frequently cultivated throughout the tropics (Pool, 2008).
Though many phytochemical constituents and valuable medicinal uses were reported from different plants belonging to family Bignoniaceae, yet it is felt necessary to explore more, so the aim of this thesis was to investigate the phytoconstituents as well as the biological activity of J. acutifolia, to validate some of its ethnopharmacological uses and to compare its activity with another plant of the same family, P. venusta.
The preliminary phytochemical screening of J. acutifolia leaves revealed its richness with a variety of compounds, including volatile oil, sterols, tannins and flavonoids; these compounds were reported to have a variety of biological activities including antioxidant, antimicrobial, anti-inflammatory, hepatoprotective and antihyperglycemic effects.
Bignoniaceae includes attractive ornamental flowering trees and lianas and produce hard and durable timbers, many pharmacologically active chemicals, various products used in local handicrafts, and even a few edible seeds and fruits (Pattnaik et al., 1997).
Many woody representatives of Bignoniaceae are well known for their use in the timber industry (e.g. Tabebuia, Cybistax, Paratecoma, Stereospermum, Parmentiera, Jacaranda, Catalpa) or as ornamentals (e.g. Jacaranda, Catalpa, Spathodea). Some genera occur mainly as lianas such as Pandorea and Macfadyena (Parker, 2008).
Chemical constituents recognized in the family are naphthoquinones of the lapachol type, iridoid glucosides, alkaloids, flavones, triterpenes, polyphenols, tannins and seed oils (Hegnauer, 1964; Gachet and Schuhly, 2009).
The genus Jacaranda, an important representative of the tribe Tecomeae in the family Bignoniaceae, is interesting from both biological and chemical perspectives. Jacaranda contains 49 species around the world that are native to Central and South America and the Caribbean. Out of the 49 Jacaranda species, 39 taxa are endemic to Brazil. Its main secondary metabolites identified are triterpenes, quinones, flavonoids, and acetosides. Members of this genus are well known in traditional ethnobotany for their pharmacological potential and promising activities, especially in the field of tropical diseases, skin problems and venereal infections (Gachet and Schuhly, 2009).
Genus Pyrostegia is a small but diverse genus of four species in the tribe Bignonieae (Bignoniaceae). The genus is native to South America, with P. venusta (Ker Gawl.) Miers frequently cultivated throughout the tropics (Pool, 2008).
Though many phytochemical constituents and valuable medicinal uses were reported from different plants belonging to family Bignoniaceae, yet it is felt necessary to explore more, so the aim of this thesis was to investigate the phytoconstituents as well as the biological activity of J. acutifolia, to validate some of its ethnopharmacological uses and to compare its activity with another plant of the same family, P. venusta.
The preliminary phytochemical screening of J. acutifolia leaves revealed its richness with a variety of compounds, including volatile oil, sterols, tannins and flavonoids; these compounds were reported to have a variety of biological activities including antioxidant, antimicrobial, anti-inflammatory, hepatoprotective and antihyperglycemic effects.
Other data
| Title | PHYTOCHEMICAL AND BIOLOGICAL STUDIES ON CERTAIN PLANTS BELONGING TO FAMILY BIGNONIACEAE | Other Titles | دراسة فيتوكيميائية و بيولوجية لبعض النباتات التي تنتمي للعائلة البجنونية | Authors | Nada Mohamed Mahmoud Mohamed Mostafa | Issue Date | 2014 |
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