Introduction to Plants
The Maple Tree

Photosynthesis: The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
The input for photosynthesis is Sunlight, Carbon dioxide, and Water. The product of this process is Glucose and Oxygen.

Most living cells use glucose as a fuel source, plant cells use glucose for energy. Excess glucose is stored such as a human would store excess energy as fat, but the plant stores its excess energy in the form of starch.

Carbohydrate: Any of various neutral compounds of carbon, hydrogen, and oxygen (as sugars, starches, and celluloses) most of which are formed by green plants and which constitute a major class of animal foods.

Starch is a carbohydrate consisting of a large number of glucose units.

In Winter there is less sunlight and the water is frozen, so photosynthesis does not occur. During Fall the Maple Tree will begin to go into a hibernation state, it will use very little energy once it goes into hibernation. The leaves will first begin to change color, then slowly fall off. Roughly about this time, the remaining glucose product which came from photosynthesis is converted into starch. In the maple tree the starch is stored in the stem and roots. One of the reasons for the conversion is, glucose has water, and when the water freezes it expands, this could be fatal for the tree. Starch has no water and so it does not expand. Also, a lot more energy is stored in the form of starch as it is componded glucose.

Wiki Starch

When spring time comes around and the temperature for liquid water, some of the starch from the roots and in the branches of the tree supply the energy for the leaf buds.

Budding for the tree is a high priority, energy is devoted to this first because if there are no leaves there will be no photosynthesis, and if there is no photosynthesis the plant will die.


During Fall before the Winter freeze, what does the Tree do to the Glucose?

The Tree converts the Glucose into Starch.

What are the three inputs for Photosynthesis?

The three inputs for photosynthesis: Water, Sunlight, and Carbon Dioxide.

What are the two outputs for Photosynthesis?

The two outputs for photosynthesis: Oxygen, and Glucose.

What is photosynthesis?

Photosynthesis is the process in which green plants use sunlight, carbondioxide and water to produce their own food. This food is a simple sugar called glucose.

Why does the Tree store Glucose as Starch?

The reason the Glucose is stored as Starch is because there is no water molecules, when water freezes it expands. This could kill the Tree. Also, starch is a more dense form of glucose, a carbohydrate, so it will take up less space.

During Spring growth shall occur; the tree will grow slightly wider and the height is added from the branches of the budding leaves which become apart of the tree and then each year it becomes widened.

The growth depends on the age of the tree and if the conditions were optimal for the promotion of its growth. The thickness of the ring is an indication of how the environment was for that particular year. If the the conditions were favorable then the thickness of the ring would be wide.

You can read a tree's age and conditions it has been through by looking at its rings.