Phototaxis in head of the nematode C. elegans

"Phototaxis behavior is commonly observed in animals with light-sensing organs. C. elegans, however, is generally believed to lack phototaxis, as this animal lives in darkness (soil) and does not possess eyes. Here, we found that light stimuli elicited negative phototaxis in C. elegans and that this behavior is important for survival.

Head avoidance response. The animal was in forward motion at the beginning. At 5.80 s, a flash of light (2 s duration, A) was turned on. At 7.05 s, the animal paused and initiated backward movement that lasted for seven head swings, followed by an omega turn."


from

Alex Ward, Jie Liu, Zhaoyang Feng & X Z Shawn Xu, "Light-sensitive neurons and channels mediate phototaxis in C. elegans", Nature Neuroscience.

Category:

Science & Technology

Tags:

• nematode
• phototaxis
• light
• sensitivity

[yeeiriser]

Thanks so much..

This is a good clip.

--------

Sincerely

Yee