What is the way by which plant cells obtain inorganic salts from the soil

Roots can absorb minerals from the soil solution, as well as minerals that are adsorbed by soil particles.

The roots absorb the minerals in the solution through the following steps:1Ions adsorbed on the cell surface of roots2

Ions enter the inside of the root (ions enter from the root surface, just as water enters the root, through both the apoplast and coplast pathways). When ions tap on the endothelium, the Kjeldahl band of the endothelial layer prevents ions from diffusing from the apoplast back to the root cortex, so the Kjeldahl band keeps the xylem at a higher ion concentration than the external solution. Ions can only enter the midcolumn through the coplast pathway, and finally the ions diffuse through the apoplast to the ducts or tracheids.

The absorption of mineral elements adsorbed by soil particles by the roots: the surface of the soil particles is negatively charged, adsorbing mineral cations, which are not easily washed away by water, and they exchange with the cations in the soil solution through cation exchange. The mineral anion is repelled by the negative charge on the surface of the soil particles, dissolved in the soil solution, and is easy to lose.

Hydrogen ions and bicarbonate ions are distributed on the surface of the roots, and the same mineral cations and anions on the surface of the soil particles are exchanged with the hydrogen ions and bicarbonate ions on the surface of the roots, respectively, and enter the roots.

As water is absorbed from the soil, inorganic salts are absorbed together. Inorganic salts are in these waters. That is, osmosis.

Plant growth needs water, inorganic salts, organic matter, etc., and roots are the main organs of plants to absorb water and inorganic salts, so water and inorganic salts are absorbed from the soil through roots

So the answer is: roots.

Summary. The principle of water absorption and inorganic salts by green plant roots: the concentration of cell sap in the hair of plant roots When the concentration of the surrounding soil solution: water absorption; Concentration of cell sap in plant root hairs When the concentration of the surrounding soil solution: water loss.

The principle of water absorption and inorganic salts by green plant roots is early: the concentration of cell sap in plant root hairs When the concentration of surrounding soil solution: water absorption; Concentration of socks in plant root capillary segments When the surrounding soil solution is concentrated in medium agitation: water loss.

Whether the plant absorbs or loses water mainly depends on the concentration inside and outside the cell When the concentration of the cell sap culture residue is greater than the concentration of the surrounding aqueous solution, the cell absorbs water; When the concentration of the cell fluid is less than the concentration of the surrounding aqueous solution, the cell loses water and hail

The main organ of the plant to absorb water is the root, and the main part of the root water absorption is the mature area of the root tip, and there are a large number of root hairs in the mature area, which can absorb water Water in the soil Root hair cells Layers of cells within the root bark Ducts in the roots Catheter stool leakage in the stem The ducts of the petiole The ducts in the leaf veins (in the mesophyll) Mesophyll cells

It mainly absorbs water and inorganic salts from the soil through the root hairs, and as the water in the duct is transported to all parts of the plant body, the stems and leaves of the plant absorb inorganic salts, mainly through the stomata on the leaves or the stratum corneum on the outer side of the epidermal cells.

Fantasy Science City: Lightning flashes cause nitric oxide, which forms inorganic salts that are absorbed by plants.

Summary. There are two forms of phosphorus in soil, inorganic phosphorus and organic phosphorus, and the main absorption of inorganic phosphorus, organic phosphorus needs to be transformed to be absorbed, in which orthophosphate is the main form of its absorption. Dihydrogen phosphate is the most easily absorbed, followed by hydrogen phosphate, which is almost not absorbed.

Plants can only absorb inorganic salts and water, not organic matter, but why it is said that soil fertility is determined with organic.

There are two forms of phosphorus in the soil, organic phosphorus and organic phosphorus, and the main absorption of inorganic phosphorus, organic phosphorus needs to be transformed to be absorbed, and orthophosphate is the main form of absorption in inorganic phosphorus. Dihydrogen phosphate is the most easily absorbed, followed by hydrogen phosphate, which is almost not absorbed. Celebration.

Hope mine can help you! Have a great day!

According to you, it is wrong to say that soil fertility has nothing to do with organic matter and has nothing to do with inorganic matter.

Because organic matter can be broken down into nitrogen, phosphorus and potassium. And there are many decomposers like this.

According to your understanding, because of the high temperature in the southern land, the microbial decomposition is fast, and the organic matter can quickly turn into a non-organic matter, and the decomposition of auspicious pats is more conducive to plant growth. However, it is generally said that the soil in the south is not as fertile as the black soil in the north.

In terms of land, there are many soil types in the northern region, the black soil of the Northeast Plain is rich in organic matter, and the soil quality is black, while the vast version of the Northwest and Loess Plateau lacks vegetation protection, and the soil is barren and yellow or brownish-yellow. Among them, the fertile black soil is also suitable for the growth of wheat, corn, peanuts, soybeans, millet, sorghum, sugar beet and other crops; Although there is more land in the southern region, it is relatively poor, especially the red soil, which is acidic to strongly acidic formed by the weathering of moderate iron-rich aluminum, and contains a certain amount of iron-aluminum oxides in the combustion cluster. , which is not suitable for the growth of these crops.

The soil in the north is softer and drier, and the soil contains less humus. In the south, the soil has more water content, more humus in the soil, and more organic matter.

In a general sense, living organisms are inseparable from water, and inorganic salts balance the concentration of biological fluids, and different inorganic salts have different effects in different tissues and organs.

Plants absorb water by transpiration, that is, the leaves are evaporating water, and the water in the upper layer of the plant is relatively small, and the water is infiltrated from the soil by osmotic pressure into the roots and then to the leaves.

Plants absorb inorganic salts by osmosis, that is, when the concentration of inorganic salts in the soil is greater than the concentration of inorganic salts in the root cell sap, they can enter the plant roots through osmosis, and then be transported to the whole plant body by the plant roots through body fluid transport.

1) Whether the plant absorbs water or loses water mainly depends on the concentration inside and outside the cell When the concentration of the cell fluid is greater than the concentration of the surrounding aqueous solution, the cell absorbs water; When the concentration of the cell fluid is less than the concentration of the surrounding aqueous solution, the cell loses water and inorganic salts absorbed by the plant roots.

Principle: The concentration of cell fluid in plant root hairs and the concentration of surrounding soil solution.

Time: water absorption; Concentration of cell sap in plant root hairs When the concentration of the surrounding soil solution: water loss.

2) The main organ of the plant to absorb water is the root, and the main part of the root water absorption is mainly the mature area of the root tip, and the mature area has a large number of root hairs, which can absorb water Water in the soil Root hair cells Layers of cells within the root bark Ducts in the roots Ducts in the stems The ducts in the petioles The leaf veins.

mesophyll) of mesophyll cells

Therefore, the answer is: (1) suck; Lose.

2) root hair cells;

Choice B because the cell membrane can control the entry and exit of substances into the cell, it is to choose the permeable membrane, so that the nutrients needed by the cell can enter the cell, and the substances that the cell does not need or are harmful to the cell are not easy to enter the cell.

bCell membrane, because the cell membrane is selectively permeable, can effectively block harmful substances from entering the cell.

The main organ of plants to absorb water and inorganic salts is the root, and the main part of the root water absorption and inorganic salts is mainly the mature area of the root tip, and there are a large number of root hairs in the mature area, which increases the absorption area of the root The duct is composed of a kind of dead cell with only a cell wall, and the upper and lower cells are through, it is located in the xylem of the vascular bundle, and its function is to transport the water and inorganic salts absorbed from the root to all organs of the body, and the transportation direction is from bottom to top The sieve tube is a pipe that conducts organic nutrients in the phloem of the plant It is formed by many tubular living cells connected up and down There are many small holes in the transverse wall of the adjacent two cells, called "sieve pores", the protoplasts of the two cells communicate with each other through the sieve pores, the sieve tube does not have a nucleus, but the sieve tube is a living cell, and the organic matter manufactured by the leaf photosynthesis is transported to other organs such as roots from top to bottom through the sieve tube Therefore, the main structure of the plant body to absorb water and inorganic salts, and the channel for transporting water are root hairs and ducts in turn

The mature zone of plant roots, also known as the root hair zone, is the main part of the root that absorbs water and inorganic salts.