There is nitrogen in the leaves, grain, plant tissue and roots of plants. Nitrogen may function as part of the plant structure or be involved in the life processes. Chlorophyll is the green part of leaves and stems. Light energy is taken by the chlorophyll and used to make sugars for the plant. Nitrogen is also an important part of the plant structure.
Protein is the substance that makes up all living matter.
Protein is stored in the grain, fruit and seeds of plants. In the roots, nitrogen is found in proteins and enzymes. They help the nutrients and water be taken up into the plant. Copyright 1999 University of Missouri. Published by University Extension , University of Missouri-Columbia.