Types
- Chemotropism, movement or growth in response to chemicals
- Geotropism (or gravitropism), movement or growth in response to gravity
- Heliotropism, movement or growth in response to sunlight
- Sonotropism, movement or growth in response to sound.
- Hydrotropism, movement or growth in response to water
- Phototropism, movement or growth in response to lights or colors of light (e.g.- the sunflower)
- Thermotropism, movement or growth in response to temperature
- Electrotropism, movement or growth in response to an electric field
- Thigmotropism, movement or growth in response to touch or contact
- Exotropism, continuation of growth "outward," i.e. in the previously established direction
- Ecotropism, limited host range (e.g. infects only one species or cell type)
- Amphotropism, wide host range (e.g. infects many of entry into cells used by a given strain of HIV)
- Neurotropism, a virus that preferentially infects the host's nervous system.
- Photoperiodism, is response to seasons
Read more about this topic: Tropism
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