UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
What happens if a green leaves plant keep under a pure red light source for long time?
Question Date: 2020-07-21
Answer 1:

Chlorophyll absorbs red and blue light. As a result, most green light is reflected and the plant appearance green.

For most plants, they will be fine with constant light exposure. Some crops can even increase their yields with the extra light. However, tomato and sweet pepper are two noticeable exceptions: constant exposure to light will damage their leaves, which can eventually kill the plant. However, it has showed that changing in temperature may help tomatoes to deal with the injuries.

This question is very interesting to NASA as well. How to maximize crop yields with limited resources will not only be important for human to go to other planets, it will help to feed people on Earth as well.

Answer 2:

I've never done this experiment, but red light is useful for photosynthesis, although blue light is even more useful.

Answer 3:

That's a popular science fair project.

Green leaves absorb red light, so the plants grow well in red light.

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use