Why Do Leaves Turn Brown in Autumn?

Answer

In leaves, there are other pigments apart from the green chlorophyll. These include carotenes and xanthophylls which are yellow and orange. During autumn, the cold and low light intensity causes chlorophyll to breakdown allowing the other pigments to show.
Q&A Related to "Why Do Leaves Turn Brown in Autumn"
Chlorophyll is a green pigment in plants and trees, allowing them to use sunlight, along with water and carbon dioxide, to create carbohydrates as food. This process is known as photosynthesis
http://www.ehow.com/about_6602832_do-leaves-turn-r...
Some leaves change color because yellow, yellowish-orange, red, and purple pigments are in the leaf, but hidden by the green chlorophyll until the leaf dies.
http://wiki.answers.com/Q/Why_do_leaves_turn_red_i...
Those colors are already in the leaf, but you can't see them because the chlorophyll which is green covers them. When the chlorophyll is gone, these colors then show, and this occurs
http://answers.yahoo.com/question/index?qid=200902...
Check out http://www.hometrainingtools.com.... The site tells you how to preserve leaves by using the microwave, wax paper pressing, and glycerol preservation. Embed
http://www.quora.com/Leaves/How-can-I-prevent-dead...
1 Additional Answer
Leaves turn brown in autumn because the chlorophyll that fills the leaves in the summertime is redirected to the branches and trunk of the tree, when the days are shorter and the temperatures become cooler. Chlorophyll is what gives leaves their green color. Without it, the leaf is another color, depending on type and what other chemicals are present.
Explore this Topic
The reason why the leaves of Rhododendrons turn brown is as a result of exposure to winter also known as a winter burn. Another reason could be as a result of ...
Gardenia leaves may turn brown for a number of reasons. It may be from too much sun or over watering. Under watering or fertilization methods can also cause the ...
Laurels exposed to bright winter sunlight and harsh winds often develop winter burn on their foliage. Their leaves dry out, turn brown, and eventually drop. ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com