In agriculture, how is the distinction between fixed and adventitious roots?

First, the meaning is different.

1. Fixed roots occur in the fixed parts of the plant body, including the main root and lateral roots.

2. Adventitious roots are roots formed from young branches, branches, above-ground stems, underground stems and old roots.

Second, the location is different.

1. The fixed root has a certain occurrence position, such as the main root is developed by the radicle, and the lateral root is born laterally at a certain position of the main root.

2. The location of adventitious roots is not fixed, and it can be sent out from stems, leaves, old roots, etc.

Third, the development is different.

1. The main root in the fixed root is directly developed from the radicle, and the lateral root is a number of branches that grow laterally from a certain part when the main root grows to a certain length.

2. Adventitious roots are developed from root primordium.

Fixed root: It mainly refers to the main root developed from the radicle, and also refers to the lateral root that has a certain occurrence position. Adventitious roots:

A type of root as opposed to a fixed root. The radicle of most monocots and a few dicots does not grow for a long time before they stop developing or die, and at this time, many roots of similar thickness are produced at the hypocotyl above the radicle or at the node at the lower part of the stem, called adventitious roots. In addition, the roots that arise from the stems, old roots, and leaf organs, and the roots that grow from calli in tissue culture are also called adventitious roots.

Adventitious roots have a similar structure and the same physiological functions as fixed roots, and they can also form lateral roots (branches) at various levels.

Fixed roots and adventitious roots Any root with a certain growth part is called fixed root, including two kinds of main roots and lateral roots. Roots that grow on the taproot and the lateral roots produced by the taproot, such as stems, leaves, old roots, or hypocotyls, are called adventitious roots because their location is not fixed.

Adventitious roots: The roots of some plants are not directly or indirectly formed by radicles, but grow from stems, leaves or other parts, and these roots are produced without a certain position, so they are called adventitious roots, such as fine puncture.

Wheat winter, half-branched lotus.

After the seeds of Coix and the other germinate, they will wither soon after the radicle develops into the taproot, and many fibrous roots of similar size and length grow from the base node of the stem, which are adventitious roots;

It is also like begonias, which take root.

The leaves and branches of chrysanthemum, mulberry, coltsfoot, eucommia, etc., are adventitious roots when they are inserted into the soil. In cultivation, it is often used for cuttings propagation.

The roots of some plants are not directly or indirectly formed from radicles, but grow from stems, leaves or other parts, and there is no fixed growth site, so they are called adventitious roots. It has the function of expanding the uptake area of plants and enhancing sessation or supporting plants. In tissue culture, the roots that grow from the callus are also called adventitious roots.

In forestry and horticulture, a large number of adventitious roots can be produced in vegetative propagation such as branch cuttings, leaf cuttings or pressing strips of willow, grape, yueji, begonia and other plants. The adventitious roots of grasses, often grown from the tillers, form early, and constitute the main part of the root system.

Generally speaking, adventitious roots are also roots, but the way they grow out is too much the same as ordinary roots, or in other ways, he uses other ways: such as cuttings, etc., roots can also grow from branches, stems and leaves, etc., although the form is different, but the same is a root, or there is a root.