Topic
Cnidoscolus
About: Cnidoscolus is a research topic. Over the lifetime, 112 publications have been published within this topic receiving 1680 citations.
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TL;DR: The fruiting behaviour indicates that the plant might selectively eliminate the growing offspring, e specially geitonogamy fruit to allocate the resources available to the plant, mostly for xenogamous fruit.
Abstract: Jatropha curcas is a pantro pical shrub It is monoecious and protandrous The ratio of male to female flowers is 29 : 1 Both flower sexes open synchronously The sexual system facilitates geitono gamy and xenogamy The flower visitors include bees, ants, thrips and flies; bees and flies effect geitonogamy and xenogamy, while ants and thrips effect only geitonogamy The fruiting behaviour indicates that the plant might selectively eliminate the growing offspring, e specially geitonogamous fruit to allocate the resources available to the plant, mostly for xenogamous fruit The ability to self -pollinate through geitonogamy is considered to be adaptive for J curcas for colonization MONOECISM, the production of separate male and female flowers on the same plant, is relatively a common s exual system among flowering plants It is widely prevalent in the members of Euphorbiaceae Bullock 1 reported monoecy in the members of Euphorbia, Phyllanthus, Argythamnia, Chamaesyce, Cnidoscolus and Croton, and dioecy in Jatropha species Studies made on the pollination ecology of some Euphorbiaceae species in Visakh apatnam region show that Cicca acida, Emblica officinalis 2
191 citations
TL;DR: Tree spinach leaves are a rich source of natural antioxidants for foods, and total phenolics and antioxidant capacity were higher in raw than in cooked leaf extracts.
Abstract: Total phenolic content and antioxidant capacity of two tree spinach species (Cnidoscolus chayamansa McVaugh and C. aconitifolius Miller.) were determined in raw and cooked leaf extracts. Antioxidant capacity was assessed by the oxygen radical absorbance capacity (ORAC) assay, and flavonoid glycoside composition was quantified by HPLC and identified by GC. Total phenolics and antioxidant capacity were higher in raw than in cooked leaf extracts. The ORAC values were strongly correlated with total phenolic content (r = 0.926) in all leaf extracts. The major flavonoids isolated from the leaf extracts were kaempferol-3-O-glycosides and quercetin-3-O-glycosides. C. aconitifolius leaves contained more varieties of the flavonoid glycosides than C. chayamansa. Cooking reduced antioxidant activity and phenolic content and resulted in losses of some kaempferol glycoside and quercetin glycoside residues in leaf extracts. The results of this study indicate that tree spinach leaves are a rich source of natural antioxid...
121 citations
TL;DR: The distribution of Ni-values in the Brazilian plant collection is different from that found in the Mediterranean and California, where there is a clear distinction between accumulator and non-accumulator plants: in Brazil the distribution is more continuous, and median Ni concentrations are much greater.
Abstract: Major collections of the ultramafic flora of Goias, central Brazil, were made by Brooks and co-workers in 1988 and 1990. At the time of reports on this material in 1990–1992 much of it had been identified only tentatively and incompletely, but the area was clearly interesting for taxonomic and biogeochemical reasons. Further progress has been made but still only two-thirds of the specimens are identified at the species level. Following a third collection in early 2005, we now have 800 specimens from this area, with chemical analyses of all the plants and of more than 120 representative soil samples. New species have been found, e.g., in Paspalum (Poaceae) and Pterolepis (Melastomataceae). There is a need for more taxonomic work in genera such as Cnidoscolus (Euphorbiaceae), Lippia (Verbenaceae), Turnera and Piriqueta (Turneraceae), and Vellozia (Velloziaceae). Ni hyperaccumulation (>1,000 mg/kg in dry plant matter) has now been found in a total of 79 specimens, representing more than 30 different species. Notable Ni hyperaccumulators include Pfaffia sarcophylla (Amaranthaceae), species of Justicia, Lophostachys and Ruellia (Acanthaceae), Porophyllum (Asteraceae), several species of Lippia (Verbenaceae), Turnera and Piriqueta (Turneraceae), and a possibly new Cnidoscolus (Euphorbiaceae). Ni hyperaccumulation has not been found in plants of the outcrops of Morro Feio or Crominia-Mairipotaba; it seems to be confined to the extensive layered ultramafics of Barro Alto and the Macedo-Niquelândia areas. The distribution of Ni-values in the Brazilian plant collection is different from that found in the Mediterranean and California, where there is a clear distinction between accumulator and non-accumulator plants: in Brazil the distribution is more continuous, and median Ni concentrations are much greater. An ultramafic hill just north of Niquelândia deserves to be protected because of the presence there of many of the hyperaccumulators and species probably endemic to the Goias ultramafics.
99 citations
TL;DR: Nutrient composition data is presented for 13 species of indigenous leafy vegetables currently consumed by the Kekchi-speaking people of Alta Verapaz, Guatemala, and Amaranthus caudatus L. (amaranth) in the raw form had the highest observed total carotene content and overall mineral content of the raw samples, whereas Sechium edule Sw.
66 citations
TL;DR: These plant materials contained significant amounts of calcium, potassium, magnesium, riboflavin, and niacin; other minerals and vitamins were also present in appreciable amounts and have potential for use in functional foods.
63 citations