Guizotia


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Guizotia

 

a genus of annual or perennial herbaceous plants of the family Compositae. There are approximately 12 species, distributed in tropical Africa. The best-known species is G. abyssinica. The plant has a branching stem, which is up to 1–2 m tall. The leaves are lanceolate. The numerous heads, each measuring 2–5 cm in diameter, are in a common panicled inflorescence. The rays are ligulate, large, yellow, and pistillate; the middle florets are tubular and bisexual. The shiny, black achenes are 3–6 mm long and contain 30–50 percent oil.

The Guizotia are native to the mountains of tropical East Africa. They are cultivated as oil plants, primarily in Ethiopia and India. The oil is used in food and in the manufacture of drying oil, paints, varnishes, and soap. The oil cake is used as livestock feed.

References in periodicals archive ?
Pollination mechanisms and inbreeding depression in niger (Guizotia abyssinica Cass).
Monechma subsessile, Aspilia pluriseta, Guizotia scabra, Spilanthes mauritiana, Macaranga kilimandscharica (stem and leaves), Coleus kilimandschari, and Rumex bequaertii.
Noog (Guizotia abyssinica) has long been cultivated in Ethiopia and is the country's most important oil crop.
(2015) observed reductions of dry matter in seedlings of Guizotia abyssinica Cass., which followed the trend of reductions in growth, and the effects were more abrupt at -0.4 MPa.
Amarowicz, "Antioxidant activity of extracts of defatted seeds of Niger (Guizotia abyssinica)," Journal of the American Oil Chemists' Society, vol.
However, these findings are at variance with Poornananda and Hosakatee [18], who reported a decrease in plant height of Guizotia abyssinica treated with sodium azide and gamma rays.
However, it seems that most of cultivated plants can be placed in three groups, according to the ecological requirements of their wild relatives: those coming from the ecotones between the forests and the savannah, such as the oil palm (Elaeis guineensis) or the African yams (Dioscorea spp.): the savannah itself such as sorghum (Sorghum bicolor), pearl millet (Citrullus lanatus); and the high lands of eastern Africa such as tef (Eragrostis tef) or Niger seed (Guizotia abyssinica).
[28.] Ramadan MF Kroh LW and JT Morsel Radical scavenging activity of black cumin (Nigella sativa L.), coriander (Coriandrum sativum L.) and niger (Guizotia abyssinica Cass.) crude seed oils and oil fractions.
Supplementation of maize stover for Ethiopian Menz sheep: Effect of cottonseed, nough (Guizotia abyssiniaca) or sunflower cake with or without maize on the intake, growth, apparent digestibility nitrogen balance and excretion of purine derivatives.