Plant Responses Tropisms.

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Presentation transcript:

Plant Responses Tropisms

Touch Thigmotropism Example: Pea plant grows faster on one side of its stem than the other side causing the stem to bend and twist around any object it touches. Other examples: vines, Venus’s-fly trap

Light Phototropism Positive Example: A plant growing towards a light. Cells on opposite side of light get longer than the cells facing the light.

Gravity Geotropism or Gravitropism Positive and Negative Positive Example: Downward growth of plant roots. Negative Example: Plant stems growing upward away from gravity.

http://plantsinmotion. bio. indiana http://plantsinmotion.bio.indiana.edu/plantmotion/movements/tropism/tropisms.html

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