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Science Tropism

Published on Nov 20, 2015

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PRESENTATION OUTLINE

TROPISM

BY:SAXON LEWIS

GRAVITROPISM

GRAVITROPISM IS A TURNING OR GROWTH MOVEMENT BY A PLANT IN RESPONSE TO GRAVITY.

Chemotropism is growth or movement of a plant or part in response to chemical stimulus

Phototropism Is the growth of organisms in response to light. It is most often observed in plants, but can also occur in other organisms such as fungi.
Mechanism · Effects of wavelength

Thermotropism or thermotropic movement is the movement of a plant or plant part in response to changes in temperature

Hydrotropism is a plants growth response to water concentrations. The response can be positive (towards the water) or negative (away from the water). Roots, for instance, are positively hydrotropic. That means that they grow towards moist soils to avoid draught stress.

Thigmotropism is the growth of a plant around a support Tropism is a phenomena by which a plant, usually climber like money plant and ivy, responds to a stimulus