What does cotyledons do and what is the role of cotyledons?

Cotyledons are one of the components of seed plant embryos, and are organs for storing nutrients or assimilating at the seedling stage. In the seeds without endosperm, the cotyledons are particularly thick and store a large amount of nutrients. In the seed with endosperm, the cotyledons are underdeveloped, but it can absorb nutrients from the endosperm, transport nutrients, and provide embryo development needs, so the role of cotyledons in the early stage of seed germination into seedlings is very important.

When a seed germinates, it first absorbs water. Nutrients in the cotyledons or endosperm are transported to the radicle, germ, and hypocotyl. Subsequently, radicles develop, first breaking through the seed coat and forming roots. The hypocotyl elongates and the germ develops into stems and leaves.

Cotyledons are a structure of seeds, which are related to the nutrients of seeds when they germinate, some as reservoirs of nutrients, and some as transporters of nutrients! Seeds can also be divided into monocotyledons and dicots depending on whether the number of cotyledons is one or two.

Dicotyledons have peanuts, etc., most of the cotyledons of dicots are used as nutrient reservoirs, like the peanuts we eat, eat its cotyledons, when dissecting peanuts, we can easily find the middle slit of peanuts, and the peanuts can be separated along the seam, and the cotyledons are separated.

Corn is a representative of monocots, and most monocots act as transporters of nutrients, and nutrients are stored in the endosperm, so these cotyledons are relatively small and difficult to see.

A place where nutrients are stored and assimilation takes place during the development of seedlings.

The main role of cotyledons is to provide nutrients to the primary plant, help it take root and germinate the first true leaves.

Cotyledons have the role of nutrient transport.

It can provide nutrients for the buds.

Midnight has the effect of nutrient operation.

Answer: Solution: The germ will develop into stems and leaves in the future, the seed coat, which is hard and protective, the hypocotyl will develop into a part of the town code that connects the root and the stem, and the radicle, which develops into a root, and the cotyledons are aligned and store nutrients So the answer is:

Plumule; Kind of royal skin; hypocotyls; Radicle; Cotyledons

The main function is to provide nutrients and energy, help plants to photosynthesize in the early stage of growth, and promote plant growth and development.

During the growth of a plant, cotyledons are the first leaves to form. Cotyledons are rich in nutrients and energy, which can provide seedlings with the nutrients and energy they need, help seedlings photosynthesize in the early stage of growth, and promote plant growth and development. As the plant grows, the cotyledons gradually shrink, and the function of the cave is gradually replaced by the true leaves.

But in some plants, cotyledons are preserved throughout the plant's growth period and assume a certain amount of photosynthesis.

In addition to its nutritional effects, cotyledons can also help plants respire, emit carbon dioxide and water vapor, and maintain the physiological balance of plants. At the same time, cotyledons can also absorb and utilize light energy, promoting plant growth and development.

The role of cotyledons is to store the nutrients that plants need to grow.

Cotyledons are a component of angiosperm seed plant embryos, which are the first leaves or the first pair or the first round of leaves in the development of a plant. The role of cotyledons is mainly to store nutrients, so as to supply the growth and development of young plants, and to assimilate the organs during the seedling growth period of plants.

The number of cotyledons varies according to the plant species, monocots have one cotyledon, such as corn, lily, etc., and dicots have two cotyledons, such as soybeans, pears, etc. The number of cotyledons of gymnosperms varied greatly, such as 2 cypresses, 3 ginkgo biloba, and many pines. The cotyledons of dicot embryos have a variety of cotyledonous shapes and physiological functions, such as the cotyledons of beans are thick and fleshy and contain a lot of nutrients, but the cotyledons of castor beans are flat and flake-like.

Monocotyledons are distinguished from dicots

Monocots usually have endosperm, while dicots usually don't. However, the basis for judging whether the seeds of a plant belong to dicot seeds or monocot seeds is not the presence or absence of endosperm, but the number of cotyledons. There are special examples.

For example, Bupleurum chinensis, which can be used as a traditional Chinese medicine in dicots, has parallel veins in its leaves. The leaves of yams in monocots have reticular veins.

There are also exceptions in the number of cotyledons, such as the germ of water lily of dicot plants and celandine seeds, and the germ of seeds of monocots such as Alocasia of the Araceae family has two leaves. There are more exceptions to the number of flowers, such as the flowers of the dicot family and Magnoliaceae, which have 3 cardinal flowers, while monocots such as Eyelia have 4 cardinal flowers. There are many other exceptions, such as the dycotyledonous Ranunculaceae and the plantain family, which have fibrous roots.

Dicotyledons have Ranunculaceae and Caryophyllaceae in the astral vascular bundles and so on.

The above content reference: late book encyclopedia - cotyledons.

The roles of cotyledons are: photosynthesis, respiration, water regulation, nutrient storage, and protection.

1. Photosynthesis.

Cotyledons are the main organs of photosynthesis in plants, and they are able to convert sunlight into chemical energy and carbon dioxide and water into organic matter. These organic substances are necessary for plant growth and development, while also providing food and oxygen for other organisms.

2. Respiration.

The leaves can not only carry out photosynthesis, but also respiration. At night or when photosynthesis is restricted, cotyledons break down organic matter into energy and carbon dioxide through respiration to sustain the plant's vital activities.

3. Moisture regulation spine.

Cotyledons regulate the water balance in the plant through stomata. When the environment is dry, the cotyledons close the stomata and reduce water evaporation; In a humid environment, cotyledons open up stomata and increase water evaporation to maintain the water balance in the plant.

4. Nutrient storage.

The cotyledons of some plants can store nutrients such as starch, protein, and fat. These nutrients provide energy and nutrients during the growth and development of plants, as well as providing support when plants are exposed to environmental stressors.

5. Protection.

The cotyledons of some plants can play a protective role, such as thorns, hairs, and chemicals. These protective structures protect plant life by preventing damage or being eaten by herbivores.

The functions of leaves are: 1. The main organ of the plant to photosynthesize and produce nutrients: 2. Carbon dioxide enters the chloroplast in the leaf for photosynthesis and produces nutrients, and transports oxygen, water and nutrients through the transpiration of the whole plant; 3. Leaves are the main places for plants to respirate, providing energy for the life activities of organisms, and leaves can be used as pesticides.

The leaves of plants are called leaves, and leaves are one of the most important organs of plants, and leaves provide photosynthesis for plants to grow.

And the leaves contain chloroplasts, and the transpiration of the plant is also achieved through the stomata of the leaves. Leaves can come in a variety of different shapes, sizes, colors, and textures. Leaves appear only on true stems, i.e., only vascular plants have leaves.

The leaves of the plants are very beautiful.