Tropism

The definition of tropism states the turning or bending movement of an organism or part, in this case a plant, toward or away from an external stimulus, including light, heat, and gravity. The plant in the picture below is exhibiting phototropism and geotropism. Phototropism is the growth of a plant in response to sun light. As you can see, the way the plant grows upward and bends allows it to get the most potential sunlight it can. In this case, the roots would exhibit negative tropism and grow downward, while the stems with exhibit positive tropism and grow upward. Geotropism is the growth of a plant in response to gravity. The plant in the picture is growing upward and exhibiting this geotropism.

Advertisements

Leave a comment

Filed under Uncategorized

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s