Tropism

Tropism

Tropism is a biological phenomenon, indicating the growth response in a plant toward or away from stimuli due to differential rates of cell elongation. The type of tropism can be defined by two categories: whether it’s negative or positive (meaning does it grow towards the stimuli or away from it) and the actual type. The types of tropism include: chemotropism, gravitropism, heliotropism, sonotropism, hydrotropism, phototropism, thermotropism, electrotropism, thigmotropism, exotropism, and host or cell tropism.
The type of tropism displayed in the picture is negative electropism. Power lines run through the middle of all of the trees on this street, causing the branches to grow away from the electric circuit.

Advertisements

Leave a comment

by | August 13, 2012 · 7:32 pm

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