Tropism

The movement of a plant in response to a stimulus.

Chemotropism
Movement in response to chemicals.

Geotropism
Movement in response to gravity.
Negative Geotropism - shoots grow upwards.
Positive Geotropism - roots grow downwards.

Haptotropism
Response to touch such as tendrils on a climbing plant wrapping themselves around other plants or supports.

Hydrotropism
Movement in response to water. Roots grow towards a source of water.

Paraheliotropism
Movement in response to light.

Thermotropism
Movement in response to temperature.

Thigmotropism
Response to touch such as tendrils on a climbing plant wrapping themselves around other plants or supports.

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Subjects: Biology