_____(A)________ is a technique of vegetative propagation in which a part of the stem or a young branch of a plant is pulled and buried in moist soil, such that the branch is still attached to the Parent Plant. After some time, roots develop in the buried part and it grows into a new plant. ________(B)__ is an example of plant usually grown through this technique.
(A) and (B) respectively are :
Understanding Vegetative Propagation
Vegetative propagation refers to a type of asexual reproduction in plants. In this process, new plants are grown from the vegetative parts of a parent plant, such as stems, roots, or leaves, rather than from seeds. This method allows for the propagation of plants that may be difficult to grow from seed or to maintain specific desirable traits.
Deciphering the Propagation Technique (A)
The question describes a specific technique where a stem or young branch is intentionally buried in soil while still connected to the parent plant. The key steps involved are:
- Selecting a suitable stem or young branch that is flexible.
- Bending this branch downwards until a portion of it can be covered by soil. This buried section is often slightly wounded or has the bark removed to encourage root formation.
- Crucially, the branch remains attached to the parent plant, allowing it to receive water and nutrients throughout the rooting process.
- Once roots develop successfully in the buried portion, the newly rooted stem is detached from the parent plant.
- This detached, rooted section can then be planted as an independent new plant.
This method is scientifically known as Layering.
Identifying the Example Plant (B)
The question also asks for an example of a plant commonly propagated using the described layering technique. Among common horticultural plants:
- Jasmine (Jasminum species) is frequently propagated by layering. Its pliable stems root readily when covered with moist soil, making it an excellent candidate for this technique.
Evaluating the Options
Let's examine the provided options to find the correct pair:
| Option Number | Technique (A) | Example Plant (B) | Assessment |
| 1 | Layering | Jasmine | This option correctly identifies the technique as Layering and provides Jasmine, a plant commonly propagated this way, matching the question's description perfectly. |
| 2 | Cutting | Potato | Cutting involves rooting a detached piece of a stem or leaf. Potatoes are typically propagated using tubers (modified stems), not the described layering method. |
| 3 | Grafting | Rose | Grafting involves joining tissues from two plants. This differs significantly from layering, where the propagated part remains attached to the parent. |
| 4 | Budding | Hydra | Budding is a specialized form of grafting. Furthermore, Hydra is an animal known for asexual reproduction via budding, not a plant propagated through horticultural techniques. |
Final Determination
Based on the detailed description of the propagation method and the common examples used in horticulture, the technique is Layering, and Jasmine is a suitable example plant. Option 1 accurately reflects this.
Important Questions from Reproduction in Plants
Which part of pollen grains contain sporo - pollenin ?
Which of the following describes the process of Apomixis ?
Sporophyte stage is dominant in which plant group?
When the ovary wall matures into a pericarp with a conspicuous stony endocarp and a fleshy mesocarp, the fruit is known as
Free nuclear divisions in endosperm development occur in
