5.4.1

Plant Hormones

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Plant Hormones

Plants produce hormones that allow them to respond to changes in the external environment. The key plant hormones are:

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Auxins

  • Auxins change growth patterns to allow roots and shoots to move either towards or away from a stimulus (change in conditions).
  • Responses to stimuli that involve directional growth are called tropisms.
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Gibberellins

  • Gibberellins are important in starting off the seed germination (sprouting) process.
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Ethene

  • Ethene is a gas that controls cell division and the ripening of fruits.

Jump to other topics

1Cell Biology

1.1What's in Cells?

1.2Cell Division

1.3Transport in Cells

2Organisation

2.1Principles of Organisation

2.2Enzymes

2.3Circulatory System

2.4Non-Communicable Diseases

2.5Plant Tissues, Organs & Systems

3Infection & Response

4Bioenergetics

5Homeostasis & Response

5.1Homeostasis

5.2The Human Nervous System

5.3Hormonal Coordination in Humans

5.4Plant Hormones

6Inheritance, Variation & Evolution

7Ecology

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