Seed structure seed germination.

| July 17, 2021 | education

Seed structure. 1. Outer rind. Depending on the type of plant, the rind is quite soft (apple seed) and very hard (walnut seed). The surface of some seeds is smooth (watermelon), while others may be rough and with various irregularities (walnut). 2. The embryo. This is the main part of the seed. It includes the kidney, stalk and root. 3. Endosperm in monocotyledonous plants and cotyledons in dicotyledonous plants. This is where the nutrients are found. 4. Pollen inlet.

Germination of seeds. Under favorable conditions, water enters the seed through the pollen inlet. Under its influence, nutrients are converted into trace elements available to the embryo. The cells begin to divide actively. The root of the embryo lengthens and leaves the pollen passage. In some plants, the cotyledons shoot up to the surface. Others remain in the ground.



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