How Do Plants Store Excess Sugar?

How Do Plants Store Excess Sugar?

Plants, Cells, and Starch

All living organisms are formed from units called cells. All cells contain DNA to create other cells. The cells are semipermeable, which means they allow some substances to get through the membrane and deny others access. Plant cells are a bit more complex. They have internal sub-sections known as organelles and micro-fibers that form a cytoskeleton in a nucleus bound to the membrane which contains DNA. Unused sugars in plants are stored as starch. Starch is considered to be a complex sugar.

The Cell Wall

The cell wall of a plant has a barrier that the membrane presses against and that it uses to maintain a rigid structure. Inside of the plant, excess sugar is stored as starch. Starches are recognized as a major component of foods ingested into the human body, to be used as energy or stored as fat. Likewise, the plant uses these starches as stored food sources. In woody plant stems, starch is also stored for later use as energy. Trees are known to create sugar through photosynthesis; the unused sugar is transported through the phloem, stored in the trunk or roots as starch and then turned back into sugar to be used as energy again at the start of a new spring.


The glucose units in plants are linked in linear bonds. Whenever plants need energy for cell work, they hydrolyze the stored starch, releasing the glucose subunits. The strategically branched polymer of glucose used in this process is known as amylopectin; it and amylose make up the two main components of starch. Starch itself is made of at least 70% amylopectin, constituting the bulk of the plant being used for energy storage.

Related Articles

How Do Plant Cells Obtain Energy?
What Part of Plant Can Store Extra Food As Sugar or...
Where Is Starch Stored in Plant Cells?
Why Do Germinating Peas Undergo Cellular Respiration?
10 Facts on Photosynthesis
The Most Common Organic Molecules in Cells
How Does ATP Work?
How Is Glucose Stored in Plant Cells?
Cellular Respiration in Plants
What Is Produced As a Result of Photosynthesis?
What Happens in the Light Reaction of Photosynthesis?
What Is a Carbohydrate Found in a Cell Wall of Plant...
What is Glucose Made Of?
How are Chemical Bonds Important in Metabolism
Is the Krebs Cycle Aerobic or Anaerobic?
How Does ADP Convert to ATP?
How to Make a 1% Sucrose Solution
Chemical Ingredients of Photosynthesis
How Does Duckweed Reproduce?
The Metabolic Pathways of Photosynthesis and Cellular...