Plant Growth Regulators
Chapter Name : Plant Growth And Development |
Sub Topic Code : 103_11_15_04_03 |
Topic Name : Plant Growth Regulators |
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Sub Topic Name : Physiological Effects Of Plant Growth Regulators |
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Introduction
Plant hormones (phytohormones) are physiological intercellular
messengers that are needed to control the complete plant lifecycle, including
germination, rooting, growth, flowering, fruit ripening, foliage and death. In
addition, plant hormones are secreted in response to environmental factors
such as abundance of nutrients, drought conditions, light, temperature,
chemical or physical stress. Hence, levels of hormones will change over the
lifespan of a plant and are dependent upon season and environment.
Pre-Requisites:
Plant growth rate, plant growth regulator
Activity:
Certain fertilizers and plant nutrients contain
plant growth regulators
Real Life Question:
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Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Apical Dominance | A condition where the terminal or apical bud inhibits the development of lateral buds on a shoot. |
| Parthenocarpy | The development of a fruit without prior fertilization. |
| Bolting | Bolting is the growth of an elongated stalk with flowers grown from within the main stem of a plant. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| fertilizers | Fertilizers contain plant growth regulators |
Real life uses :
For enhancing plant growth
Places to visit :
Plant nursery, garden
Practical examples around us
| Examples | Explainations |
|---|---|
| Plant fertilizers, nutrients | Contain plant growth regulators |
What you learn in Theory:
We learnt about
the functions of each of the plant growth regulators.
What you learn in Practice:
Plant growth regulators alter the growth rate