Question

Строение семени однодольных растений

Answer 1

Строение семян однодольных растений Растения, имеющие в зародыше семени одну семядолю, называют однодольными. ... Семя пшеницы одето золотисто-жёлтым кожистым околоплодником. Он плотно сросся с семенной кожурой и отделить его невозможно.

Answer 2

Structure of Seeds in Monocot Plants

The structure of seeds in monocot plants is characterized by several key features. Monocots are a group of flowering plants that have a single cotyledon (seed leaf) in their seeds. Here are the main components of the seed structure in monocots:

1. Seed Coat: The seed coat, also known as the testa, is the outer protective covering of the seed. It helps to protect the embryo and the endosperm inside the seed. The seed coat can vary in thickness and texture depending on the plant species.

2. Endosperm: The endosperm is a tissue that surrounds the embryo and provides nourishment to the developing plant. In monocots, the endosperm is usually large and starchy, serving as a source of energy for the germinating seedling.

3. Embryo: The embryo is the young plant contained within the seed. It consists of the embryonic axis, which includes the radicle (embryonic root) and the plumule (embryonic shoot). The radicle is the first structure to emerge during germination, while the plumule develops into the leaves and stem of the plant.

4. Cotyledon: Monocots have a single cotyledon, which is the seed leaf that emerges from the embryo. The cotyledon plays a crucial role in absorbing nutrients from the endosperm and transferring them to the developing plant.

5. Coleoptile and Coleorhiza: Some monocots, such as grasses, have additional structures called the coleoptile and coleorhiza. The coleoptile is a protective sheath that covers the emerging shoot, while the coleorhiza covers the radicle.

6. Scutellum: The scutellum is a specialized cotyledon found in grasses. It is modified to absorb nutrients from the endosperm and transfer them to the developing embryo.

7. Micropyle: The micropyle is a small opening in the seed coat through which water and gases can enter during germination.

These are the main components of the seed structure in monocot plants. The specific details may vary depending on the plant species. For a visual representation of the structure of a monocot seed, you can refer to the following image: [^3^].

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