How Leaves Grow Questions?

Question

1. Describe what happens to leaves during the day.

2. Why might plant leaves change from night to day?

3. What controls the change in leaves from night to day?

Answer 1

During daylight leaves photosynthesize so need to be exposed to the light.

http://links.jstor.org/sici?sici=0002-91...

http://www.amjbot.org/cgi/reprint/84/3/3...

http://www.thieme-connect.com/ejournals/...

http://www.pubhort.org/members/showdocum...

At night they have the option of folding to avoid nocturnal herbivory. This is called nyctinastic leaf movement. It is a circadian rhythmic movement in legumes like the acacias and clovers. It is controlled by water pressure in the plant so it is fast and reversible unlike hormone driven movements. It is a reversible response regulated by light.

http://www.virtualherbarium.org/GardenVi...

Nastic movement defined and classified:

http://www.tiscali.co.uk/reference/encyc...