In botany, a photoassimilate is one of a number of biological compounds formed by assimilation using light-dependent reactions.
This term is most commonly used to refer to the energy-storing monosaccharides produced by photosynthesis in the leaves of plants.
[1] Only NADPH, ATP and water are made in the "light" reactions.
Monosaccharides, though generally more complex sugars, are made in the "dark" reactions.
[citation needed] Photoassimilate movement through plants from "source to sink" using xylem and phloem is of biological significance.