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In girdling experiment which part of plant dies first ?
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In girdling experiment which part of plant dies first ?
In a ring girdled plant, the root dies first. A ring of bark is cut from the stem. It also removes phloem. Nutrients collect above the ring where the bark also swells up and may give rise to adventitious roots.
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In girdling experiment which part of plant dies first ?
Introduction:
Girdling, also known as ring barking, is an experimental technique used to study the movement of nutrients in plants. It involves removing a ring of bark from the main stem or branch, resulting in the interruption of the flow of nutrients and water. This disruption eventually leads to the death of certain parts of the plant. Let's explore which part of the plant dies first in a girdling experiment and the reasons behind it.

Reasons behind plant death:
When a plant is girdled, the flow of nutrients and sugars from the leaves to the roots is hindered. This occurs because the phloem, the tissue responsible for transporting sugars and other organic molecules, is located just beneath the bark. Girdling effectively severs the phloem, preventing the downward movement of sugars and nutrients. As a result, the plant suffers from an imbalance between the production of sugars in the leaves and the inability to transport them to the roots. This imbalance eventually leads to the death of specific plant parts.

Order of plant death:
1. Roots: The roots are the first to die in a girdling experiment. Since the phloem is disrupted, the roots no longer receive the essential sugars and nutrients necessary for their survival. As a result, the roots gradually wither and die due to starvation.
2. Shoot tips: After the roots, the shoot tips begin to die. As the downward movement of sugars is halted, the shoot tips do not receive an adequate supply of nutrients. Over time, these parts become weakened and eventually perish.
3. Branches: The branches are the next to be affected. Without a continuous supply of sugars and nutrients, the branch tissues start to deteriorate. The lack of essential resources leads to the death of branches, which may become dry and brittle.
4. Leaves: Lastly, the leaves of the girdled plant begin to die. As the nutrients cannot be transported downward, the leaves lose their vitality and eventually turn yellow or brown. Without sufficient sugars and nutrients, the leaves cannot sustain themselves and ultimately perish.

Conclusion:
In a girdling experiment, the roots of a plant are the first to die, followed by the shoot tips, branches, and finally, the leaves. This order of plant death can be attributed to the interruption of phloem transport, which prevents the downward movement of sugars and nutrients. The plant parts that are the farthest away from the site of girdling, such as the leaves, are the last to be affected. Girdling experiments provide valuable insights into the importance of phloem in nutrient distribution and plant survival.
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Root and StemDefinition of RootA root is an underground part of a plant that typically lacks nodes, leaves, and buds. It is responsible for anchoring the plant in the soil, absorbing water and minerals, and storing nutrients. Roots can be classified into two types: taproots and fibrous roots.Definition of StemA stem is the aboveground part of a plant that supports leaves, flowers, and fruits. It contains nodes, internodes, and buds. The primary functions of a stem are to transport water, nutrients, and sugars between the roots and the leaves, provide structural support, and facilitate the growth of the plant.Differences between Root and Stem1. Structure- Root: Roots are typically found underground and have no nodes or leaves. They have a central primary root, known as the taproot, from which smaller lateral roots branch out.- Stem: Stems are found aboveground and have nodes, internodes, leaves, and buds. They have a central main stem, known as the shoot, from which lateral branches and leaves arise.2. Function- Root: The main functions of roots are anchoring the plant in the soil, absorbing water and minerals, storing nutrients, and providing support.- Stem: Stems have several functions, including transporting water, minerals, and sugars between the roots and leaves, providing structural support, and facilitating growth and reproduction.3. Location- Root: Roots are typically found below the soil surface, although some plants have aboveground roots called aerial roots.- Stem: Stems are generally located above the ground, but they can also be partially or entirely underground.4. Growth- Root: Roots grow in length from the root tip and branches develop from the primary root.- Stem: Stems grow in height from the apical meristem located at the tip of the stem. This growth allows the plant to reach sunlight and maximize photosynthesis.5. Types- Root: Roots can be classified as taproots or fibrous roots based on their structure and branching pattern.- Stem: Stems can be classified as herbaceous or woody based on their texture and ability to undergo secondary growth.ConclusionIn summary, roots and stems are essential parts of a plant with distinct structures and functions. Roots are primarily responsible for anchoring the plant, absorbing water and minerals, and storing nutrients. Stems, on the other hand, support leaves, flowers, and fruits, transport substances throughout the plant, and provide structural support. Understanding the differences between roots and stems helps us appreciate the complexity and diversity of plant anatomy and physiology.

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In girdling experiment which part of plant dies first ?
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