Auxin
Auxin
Auxin (/ˈɔːksɪn/) is a type of plant hormone that plays a crucial role in the coordination of many growth and behavioral processes in the plant's life cycle.
Etymology
The term "auxin" is derived from the Greek word "auxein", which means "to grow". It was coined in the early 20th century by plant physiologists who were studying the effects of light on plant growth.
Function
Auxin is primarily produced in the apical meristem of a plant and then transported throughout the plant, causing a variety of effects. It is involved in cell elongation, apical dominance, root formation, and several other developmental processes.
Types of Auxin
There are several types of auxins, including Indole-3-acetic acid (IAA), Indole-3-butyric acid (IBA), and 1-Naphthaleneacetic acid (NAA). Each of these auxins has a slightly different effect on plant growth and development.
Related Terms
- Plant hormone: A chemical substance produced in plants that regulates growth and other physiological processes.
- Apical meristem: The growth region in plants found within the root tips and the tips of the new shoots and leaves.
- Cell elongation: The process by which plant cells increase in length, contributing to the growth of the plant.
- Apical dominance: The phenomenon whereby the main, central stem of the plant is dominant over other side stems.
- Root formation: The process by which new roots are formed, often regulated by auxin.
External links
- Medical encyclopedia article on Auxin
- Wikipedia's article - Auxin
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