Peanut history and it's phytochemicals.
Article Content:
- .Basic Botanical Data of Peanut.
- .Peanuts:Arachis hypogaea L.
- .Whole Plant Description of Peanut.
- .Distribution of Arachis hypogaea L,Peanut,groundnut:Eco-geographic Distribution.
- .Taxonomy of genus Arachis.
- .History and Origin of Arachis hypogaea L,Peanut,groundnut.
- .Peanut: Phytochemicals and nutrients.
- .Uses of Arachis hypogaea L.Peanut,groundnut.
- .Folk Medicine and Medicinal Uses of Peanut.
- .Cooking Peanut.
- .Optimization of extraction methods for identification of selected phytochemicals in peanuts.Arachis hypogaea L.
- .Research Update:Peanuts.Arachis hypogaea L.
Whole Plant Description of Peanut.
The peanut plant is a low-growing, annual legume with a central upright stem. The numerous branches vary from low-flat to almost erect. Peanut varieties are separated into bunch and runner types. The nuts,which are legume pods like peas and beans, are closely clustered at the base of the bunch type. The runner varieties have nuts scattered along their prostrate branches from base to tip.
The peanut has a well-developed taproot with numerous lateral roots that extend several inches into the ground. Most roots have nodules but bear very few root hairs.
The peanut plant is procumbent or semi-erect, with rather small compound-pinnate, smooth leaves. The seeds are enclosed in a rather fibrous pod. After the flowers are pollinated a short, thick stem at the flower base, termed gynophore, grows downward and penetrates into the soil, so the fruiting body develops entirely underground. Seeds, the edible part, are 1 to 4 per pod, 0.25 - to 0.75 -inch long and vary from near globose to elongated. In harvesting, the entire plant with adhering seed pods is lifted from the soil, mainly mechanically, dried in windrows or stacks, then threshed to remove the seeds.
Peanut flowers are borne in the leaf axils, above or below ground, singly or in clusters of about three. It is not uncommon to find the blossoms with their yellow petals 3 inches below the soil surface. After self-pollination, the ovary which produces the pods is pushed into the soil by "pegs" where the pod develops. The pods, containing usually from one to three seeds, develop only underground. Each seed is covered with a thin papery seed coat.
Reference:
1.Peanut history and it's phytochemicals.




