Plants are those organisms that possess photosynthesis, cell walls, spores and more or less sedimentary behavior.
Botany is the study of most organisms traditionally treated as plants, including virtually all eukaryotic photosynthetic organisms (land plants and the several groups of algae) plus other eukaryotic organisms with cell walls and spores.
To study plants scientifically we have to assume that all biological phenomena can be explained by the laws of physics. It is not possible to calculate plant function from it structure using first principles alone.
Secondary metabolites are a diverse array of organic compounds that appear not to have a direct function in plant growth. They have a restricted distribution within the plant kingdom, they are found in only one plant or in a restricted group of plants.
These molecules often have an important economical value. They can be identified and purified and their chemical structure is known.
Plant systematics is a science that includes and encompases traditional taxonomy, the description, identification nomenclature and classification of organisms, that has as its primary goal the reconstruction of phylogeny on the evolutionary history of life(1).
We classify plants and try understand the relations between the vast diversity of plants with plant systematics. While studying plant systematics you will discover that species have adopted the same basic principles in order to continue their existence.
Examples Enzymes and nucleïc acids are used by all living species. Cellulose, starch and chlorophyl are molecular component used by all plants.
It is thus possible to identify molecules that have significant consequences for plant function or that have an important economical or practical use. We can calculate the properties of these molecules directly from the law of physics using first principles alone.
Plant physiology is a science that studies the relation between molecular mechanisms and the function and behavoir of larger plant structure like plant tissues.
Biochemistry is the study of the chemistry of the life processes (2).
Systematics, plant physiology and biochemistry are three major areas of biological science where quantumbiochemistry can be applied.
There are many more biological sciences some are more specialized ( e.g. cell biology, genetics, plant root science ) others are focussed on applications (e.g. plant nutrition, medical plant) still other focus on the application of mathematics ( e.g. biomathematics).