Flavonoid diversity and geographic endemism in Parthenium

Mears, James A.

doi:10.1016/0305-1978(80)90038-1

Cited by 16 publications

(10 citation statements)

References 15 publications

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“…These data, along with other information, lead to the suggestion that the species in this section may have been derived by fragmentation of some ancestral form followed by geographical isolation. It should be noted, as was done by , that the tendency of narrowly endemic taxa to have simpler pigment profiles is in agreement with observations of Mears (1980b) on Parthenium.…”

supporting

confidence: 75%

“…If the species is widespread, occurring in a variety of primarily noncalcicolous habitats, then it will tend to express a high flavonoid diversity, through predominance and variation in flavonoid glycosides; and the aglycones will tend to be less 498 Efficacy of Flavonoids at Different Taxonomic Levels methylated." Mears (1980b) ends his discussion with the suggestion that if such trends are related to habitat, or specifically, edaphic conditions, as they appear to be in Parthenium, the situation may exist for other systems. Implicit in this conclusion is the obvious need to understand how soil type influences flavonoid, or any secondary metabolite, expression in plants.…”

Section: Partheniummentioning

confidence: 96%

“…According to the description of Parthenium by Mears (1980b), the genus consists of 15 species in North America north of Guatemala, two species in South America, and one, P. hysterophorus, that has spread from tropical and subtropical America to many other parts of the world (where it has become a particularly aggressive weed). Mears (l980a,b) described the flavonoids of some two dozen or so taxa including varieties of four of the species (see Chapter 23).…”

Section: Partheniummentioning

confidence: 99%

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Flavonoids of the Sunflower Family (Asteraceae)

Bohm

Stuessy

2001

119

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This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machines or similar means, and storage in data banks. This book is dedicated to:Arthur Cronquist Outstanding plant systematist and major contributor to understanding taxonomic relationships within Asteraceae and Ralph E. Alston (1925Alston ( -1967) Visionary natural products chemist and geneticist who pioneered the use of chemical data in studies of plant systematics and evolution PrefaceCertainly many of the readers of this book will remember the early developments of chemosystematics in the late 1950s. We ourselves remember the excitement of these new data bearing on plant interrelationships. The hopes were high, the techniques were rapidly evolving, the quantities of data were large, and young workers were eagerly enthusiastic. Some even went so far as to predict that chemical data would soon replace morphological information as the basis for plant classification. These overly zealous predictions did not materialize, of course, as the history of plant systematics has amply shown during the past two centuries. If there is any distinct characteristic of systematics it is synthesis, as Lincoln Constance (1964) called it, the "unending synthesis." New tools generate new data and provide insights on additional dimensions of plant relationships. This will never change-we will continue to discover new tools and new data in the years ahead, and they will continue to be incorporated into the predictive general reference system of classification.The earlier efforts in chemosystematics focused on secondary plant products: alkaloids, betacyanins, carbohydrates, cyanogenic glycosides, glucosinolates, lipids, terpenoids, and especialiy flavonoids. The latter were particularly well suited for chemosystematic investigation for several reasons: ease of isolation and characterization, small amounts of plant material needed for analysis, stability of compounds especially through routine preparation of herbarium specimens, and low cost to obtain useful information. As a result of these considerable advantages, literally thousands of studies on use of flavonoids in plant systematics have been published. Although now with the present zest for macromolecular data from DNA restriction sites and sequences, there are fewer workers and laboratories dedicated to flavonoid chemosystematic studies; twenty years ago they were the new currency of exciting data in plant systematics.Because of many workers historically interested in the sunflower family, Asteraceae (or Compositae), in part due to its large size (approximately 23,000 species;Bremer, 1994), and because hundreds of flavonoid compounds were discovered in this family, many chemosystematic investigations have been completed on various taxa. Many studies came from the laboratories of R. A. Alston, B. L. Turner, and T. J. Mabry in the Department of Botany ...

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supporting

confidence: 75%

Section: Partheniummentioning

confidence: 96%

Section: Partheniummentioning

confidence: 99%

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Flavonoids of the Sunflower Family (Asteraceae)

Bohm

Stuessy

2001

119

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“…franciscana was shown as likely to be an old species as a neoendemic (Gottlieb, 1973). Parthenium species which are geographically and ecologically isolated on limestone or gypsum habitats do have depauperate flavonoid patterns (Mears, 1980). Roose and Gottlieb (1976) found that the allotetraploids do in fact have all the enzyme multiplicity present in the parent plus some additional, novel combinations.…”

Section: Genesismentioning

confidence: 99%

Analytical Biogeography

1990

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“…[31] The important constituents, considered as chemical markers of Santolina species were not detected in our work suggesting a high chemical differentiation of S. africana probably because of its specific position as an endemic plant which could play an important role in flavonoid diversity. [32] Today, there are increasing studies to search for novel as α-amylase and α-glucosidase inhibitors from natural sources expected to be effective and safe. In this work the evaluation of antidiabetic potential the extracts was done in vitro by inhibitory assays using enzymes α-amylase and α-glucosidase.…”

Section: Antioxidant Activitymentioning

confidence: 99%

Chemical composition and bioactivities of the polyphenolic-rich extract of Ormenis africana Jord. and Fourr

Béjaoui

Boulila

Salem

et al. 2016

International Journal of Food Properties

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Ormenis africana is an endemic North African species used in folk medicine because of its hypoglycemic property. In this study, the α-amylase and α-glucosidase inhibition and antioxidant activities of the polyphenolic-rich extract from O. africana were determined. The chemical composition was made using liquid chromatography with photodiode array and electrospray ionization mass spectrometry method and the identification of phenolics was assessed by comparing their retention times and ultraviolet and mass spectra with those of the standards and/or reported in the literature. The total phenolic content was estimated by the Folin-Ciocalteu method. The antidiabetic potential was estimated by the determination of α-amylase and α-glucosidase inhibition in vitro. Four assays were used for the evaluation of antioxidant activity of the extracts. Seventeen phenolic compounds were detected. The major peaks are chlorogenic acid, 5-O-di-caffeoylquinic acid, and apigenin and luteolin derivatives. The polyphenolic-rich extract showed remarkable α-amylase and α-glucosidase inhibition activity in a concentration dependent manner. Furthermore, the extract also demonstrated high antioxidant activities. O. africana can serve as a potential natural source for the development of a novel α-amylase and α-glucosidase inhibitory agents against diabetic complications. ARTICLE HISTORY

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Flavonoid diversity and geographic endemism in Parthenium

Cited by 16 publications

References 15 publications

Flavonoids of the Sunflower Family (Asteraceae)

Flavonoids of the Sunflower Family (Asteraceae)

Analytical Biogeography

Chemical composition and bioactivities of the polyphenolic-rich extract of Ormenis africana Jord. and Fourr

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