Basipetally

1. The development of plant tissues from an apex region (of shoots or roots), for example such as a leaf tip, to the base of a plant. This downward (or inward) movement in the leaves occurs when they start to cease cell division and stop photosynthesising; they die back from the leaf tip progressing down the leaf to turning it a sickly yellow colour.
2. The movement of substances, such as carbohydrates, in solution, from an apex region to the base of a plant.