1, sunflower cell structure
The cell structure of sunflower is similar to other plants, which consists of cell wall, cell membrane, cytoplasm and nucleus. Cell wall is the external structure of plant cells, which plays the role of protection and support.
Cell membrane is the boundary of cells, which controls the entry and exit of substances in cells. Cytoplasm is the liquid part of cells, which contains various organelles and biochemical reactions. The nucleus contains genetic material that controls cell growth and division.
2. Organs and tissues of sunflower
Sunflower is a plant with many organs and tissues, which are composed of different types of cells. Roots, stems, leaves, flowers and fruits are the main organs of sunflower.
Roots are important organs for plants to absorb water and nutrients, stems are the trunk of plants, leaves are organs for photosynthesis, flowers are organs for reproduction, and fruits are organs for protecting and spreading seeds.
3. Growth and development of sunflower
The growth and development of sunflower is a complex process, which needs to go through stages such as seed, germination, seedling, flowering and fruiting. In the seed stage, sunflower seeds are produced by the mother plant, which contains genetic information and growth potential. In the germination stage, seeds absorb water and nutrients, start to germinate and form seedlings.
At seedling stage, sunflower seedlings begin to undergo photosynthesis, growth and differentiation, forming various tissues and organs. In the flowering and fruiting stage, the flowers of sunflower begin to open and multiply, while the fruits form and mature.
Sunflowers can be used as food, environmental protection plants and ornamental plants in life.
1, as food
Sunflower is a nutritious vegetable, which contains a lot of vitamins and minerals, such as vitamins A, C, E and B, calcium, iron and potassium. In addition, sunflower is also rich in fatty acids, among which linoleic acid and lecithin have the functions of lowering cholesterol and protecting cardiovascular and cerebrovascular diseases. Proper consumption of sunflower is beneficial to human health.
2. Environmentally friendly plants
Sunflowers are also widely used in environmental protection. Sunflower is an environmentally friendly plant, which can absorb carbon dioxide in the air, purify the air and reduce noise pollution. Sunflower seeds can be used to make food and feed, sunflower seed oil can be used as raw materials for edible oil and biodiesel, and sunflower seeds are also widely used in agriculture and energy fields.
3. Ornamental plants
Sunflower is also an ornamental plant, which can be used for urban greening and garden landscape. Sunflower flowers open to the sun and rotate with the movement of the sun, giving people a fresh and lively feeling. At the same time, sunflower is the theme of many cultural and artistic works, such as painting and poetry.