1. Peanut is millet. It only takes more than one month from sowing to flowering, but the flowering period lasts for more than two months. Its flowers are solitary or clustered in leaf axils, ranging from 200 to thousands per peanut.

2. After flowering and pollination, the stalk of the ovary at the base of the ovary is constantly elongated, and a purple fruit needle grows from the withered flower tube. The fruit needles are rapidly elongated longitudinally. It grows upward first, and a few days later, the ovary stalk hangs on the ground. In the process of extension, the epidermal cells of ovary stalk lignified, which protected the young fruit needles from entering the soil. ?

3. When the needles are buried in the soil for 5 ~ 6 cm, the ovaries begin to lie horizontally, become fat and white, and hair grows on the body surface, which can directly absorb water and various nutrients for growth and development. In this way, seeds are formed one after another, the epidermis gradually shrinks and the pods gradually mature, forming the peanut fruit we see.

4. The above-ground flowering and underground fruiting are the inherent genetic characteristics of peanuts and the result of long-term adaptation to special environment. Peanuts like dark, humid and mechanically stimulated ecological environment when they bear fruit. These factors become indispensable conditions for pod growth and development. Therefore, in order to survive and spread seeds, it has to put its ovary into the soil to bear fruit.

The role of peanuts:

1. Lowering cholesterol: Peanut oil contains a lot of linoleic acid, which can decompose cholesterol in human body into bile acid and excrete it, so as to avoid the deposition of cholesterol in the body and reduce the incidence of various cardiovascular and cerebrovascular diseases caused by cholesterol exceeding normal.

2, delaying human aging: the zinc content in peanuts is generally higher than other oil crops. Zinc can promote the development of children's brain, enhance the memory function of the brain, activate the brain cells of middle-aged and elderly people, effectively delay the premature aging of the human body and have anti-aging effects.

3. Promote children's bone development: Peanut is rich in calcium, which can promote children's bone development.

4. Prevention of tumor: Peanut and peanut oil contain resveratrol, which is a natural polyphenol with strong biological activity. Peanut products rich in resveratrol, peanut oil and other related peanut products will play a greater role in diet and health. ?

5. Coagulation and hemostasis: Peanut skin contains oil and vitamins, and contains substances that shorten coagulation time, which can resist the dissolution of fibrin and promote the production of platelets in bone marrow. It not only stops bleeding for various hemorrhagic diseases, but also has a certain therapeutic effect on primary diseases, which is beneficial to human hematopoietic function.