How does translocation occur in a plant?

Answer 1

Translocation in plants refers to the movement of organic substances, mainly sugars produced during photosynthesis, from one part of the plant to another. This process primarily occurs in the phloem, which is a specialized vascular tissue responsible for the transport of these substances.

During photosynthesis, sugars (mainly sucrose) are synthesized in the leaves. These sugars need to be transported to other parts of the plant, such as roots, stems, and fruits, for energy and growth. The process of translocation involves the following steps:

1. Sugar Loading : In the source (usually leaves), sugars are actively transported into the phloem cells.

2 Water Movement : The entry of sugars into phloem cells creates a high solute concentration, leading to water movement into these cells by osmosis.

3. Pressure Buildup : The influx of water increases pressure within the phloem, creating a positive pressure called turgor pressure.

4. Mass Flow : The pressure gradient created by the turgor pressure causes the movement of sugars along with water through the phloem toward the sink (the part of the plant where the sugars are needed).

5. Sugar Unloading : At the sink (roots, growing tissues, sugars are actively transported out of the phloem cells and used for various metabolic processes or stored.

Translocation is a crucial process for the distribution of nutrients and energy throughout the plant, supporting its growth and development.

Answer 2

Translocation occurs in plants because sugar from a source enters phloem cells by active transport, then when sugar concentration in the phloem increases water enters the sieve tubes in phloem from xylem by osmosis, next pressure builds up inside the sieve-tube cells and pushes sugar through the sieve tubes, lastly sugar moves from the phloem cells into a sink by active transport.

Answer 3

Definition

Translocation means a change in location. It usually refers to genetic translocations, in which part of a chromosome is transferred to another chromosome. This type of translocation results in changed and often flawed chromosomes. In another type of translocation, two chromosomes will trade pieces with each other.

Genetic translocations can cause serious disorders, including chronic myelogenous leukemia.

Answer 4

Definition

Translocation means a change in location. It usually refers to genetic translocations, in which part of a chromosome is transferred to another chromosome. This type of translocation results in changed and often flawed chromosomes. In another type of translocation, two chromosomes will trade pieces with each other.

Genetic translocations can cause serious disorders, including a type of chronic myelogenous leukemia.

Reviewed By

Review Date: 08/05/2011

David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Answer 5

Translocation occurs during cell division. This is a mutation in DNA that happens when a cell duplicates and then divides.

Answer 6

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