Question

Adventitious roots arise from part other than​

Answer 1

Answer:

Some roots, called adventitious roots, arise from an organ other than the root—usually a stem, sometimes a leaf. They are especially numerous on underground stems, such as rhizomes, corms, and tubers, and make it possible to vegetatively propagate many plants from stem or leaf cuttings

Answer 2

Answer:

Some roots, known as adventitious roots, develop from an organ other than the root—usually a stem, but occasionally a leaf. They are particularly abundant on subterranean stems such as rhizomes, corms, and tubers, and allow for the vegetative propagation of many plants from stem or leaf cuttings.

Explanation:

During germination, the seed's radicle develops downward and branches out. The root system refers to the branches that connect to the central root. Because roots lack chlorophyll, they are not green. Roots are positively geotropic and hydrotropic, which means they grow towards the ground and water, and negatively phototropic, which means they grow away from the light. Plants have three types of root systems, which are as follows:

1. System of Taproots

Dicots have a root system in which the principal root develops from the radicle of the developing seeds. In this type of root system, several roots emerge laterally from the parent root. The taproot system gives the plant with excellent anchoring, and the taproot grows deeply into the soil. Examples- Mango, Mustard, Gram, Etc.

2. The System of Fibrous Roots

Monocots exhibit the fibrous root system, in which the roots form into a thin and dense network. These roots do not go much deeper into the earth. They stay near the surface. As a result, unlike Taproots, they cannot provide strong anchoring. In some plants, branching roots can sprout from a primary root, but the primary root is short-lived. With this sort of root system, the roots emerge from the radicle and plumule of the growing plant. Taproots and fibrous roots are both possible in some plants. Wheat, paddy, onion, maize, and other crops are examples.

3. The Unusual Root System

Adventitious roots form from plant components other than the plant's radicle. Monocots are characterised by an adventitious root system. In this situation, roots grow from stems, leaves, shoots, or any other plant element. Adventitious roots form naturally or in response to stress. They are rather a component designed to withstand harsh circumstances. Drought, a lack of nutrition, or physical wounds can all be stressors. Adventitious roots help in vegetative proliferation, support, and so on. Examples include the banyan tree, maize tree, oak tree, black pepper tree, beetle tree, and others.

Adventitious roots are changed from their regular duties to perform a range of purposes like as food storage, mechanical support, and so on. The following are some adaptations of adventitious roots:

1. Food Storage: Annulated root, Nodulose root, Tuberous root, Fasciculated root, and Moniliform root Roots with tubers: Tuberous roots are fleshy, have no distinct form, and may swell. Sweet potato is one example (Ipomoea batatas).
2. Moniliform roots: These roots are likewise inflated at regular intervals, giving them a lovely look. Rose moss, for example (Portulaca grandiflora).
3. Annulated roots: This root has a series of outgrowths on the body that approximate the form of rings. Example-Ipecac (Cephaelis ipecacuanha).

Mechanical Stability:

1. Prop or Pillar Adventitious Roots: These roots grow downward from the plants' branches and are regulated to encourage thick, heavy branches. The aerial roots absorb moisture. Banyan Tree as an example (Ficus benghalensis).

2. Climbing Roots: Climbers have these roots. They are non-absorptive roots that assist the plant in anchoring itself to the structure. Tecoma (Tecoma stans) is an example.

3. Buttress Roots: These roots form near the base of the stem and aid in the plant's structural strength. The stem's base is vertically extended and extends in various directions in the soil. Arjuna Tree as an example (Terminalia arjuna).

4. Vital functions: Assimilation roots are green-colored roots of plants like Trapa that are capable of photosynthesis. Sucking roots are found in some plants and are used by parasites to extract nutrients from the host.

Reference Link

• https://brainly.in/question/7387987
• https://brainly.in/question/147876