direction of translocation of plant food

[joelle]

if anyone knows the answer to this, please post.

 

In which direction(s) does the translocation of plant food occur?

[SkepticLance]

Depends on your definitions. Translocation is a general term simply meaning moving something. Plant food could be minerals, CO2, water, or the manufactured food in leaves.

 

Minerals and water are absorbed into root hairs, and pass upward through vessels and tracheids to all other parts of the living plant. Some parts of a plant (such as a big part of the wood, and the bark) are dead tissue and do not receive anything by translocation.

 

Manufactured food (sugars) in the leaves are passed in the opposite direction to all parts of the living plant. CO2 passes from air through the stomata into the leaves to the photosynthesizing cells.