Seed parts

The seeds are the mature ovules of gymnosperm and angiosperm plants from which a new plant will develop. Through the proliferation of the seed or nugget is one of the different ways in which plants propagate and for what they are called spermatophytes .

The objective and function of the seeds is to give a new plant, so the seed will not germinate until it has the most suitable conditions that can ensure the continuity of the future plant.

One way to obtain your own organic seeds is to extract them from the organic fruits that you purchase for consumption.

Seed parts

Embryo: it is the plant, very small, contained in the seed. He is in a state of lethargy. The embryo is made up of 4 parts:

1.- Radicle: It is a rudimentary first root that the embryo has. From this root, secondary roots and hairs will develop to improve the absorption of nutrients.

2.- Plumule: It is a bud that is on the opposite side to the radicle.

3.- Hypocotyl: It is the space between the radicle and the plumule. This part will become a stem

4.- Cotyledon: It is the first or two first leaves of the embryo of a flowering plant. According to the number of cotyledons that the seed has, it is divided into monocots, which will have a single leaf, while dicots develop two cotyledons.

Endosperm: or also called albumen, it is the reserve of food that the seed has, normally starch.

Episperm: it is an outer layer. In gymnosperm it is made up of a single layer called the testa, while in angiosperm it is made up of two layers, the testa and the tegumen below.

seed parts

. The seed germination does not take place until conditions are most conducive to ensure survival. So it will remain in a state of lethargy until this process begins, which will give a new plant. The most important thing for the seed is temperature and humidity, while light is not necessary for this process.

During the germination process of the seed, the radicle comes out first, which will enter the soil and begin to develop, becoming the roots of the plant. The cotyledons will open and below these the hypocotyl will begin to develop, which will be the stem of the plant. Then the cotyledons will wilt and new leaves will sprout from the stem. Sometimes the cotyledons remain below the ground level ( hypogeal germination ), while at other times they remain above the ground ( epigeal germination ).

Read more about seeds and germination


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