Plant Nutrition-Photosynthesis (Biology)?

Question

Describe how the products of photosynthesis are carried from the leaves of a plant to an underground storage organ.

Answer 1

Phloem Transport: Translocation refers to the transport of produced products to the rest of the plant via the phloem. Phloem carries sucrose, minerals, amino acids, and hormones.

Source to Sink Transport:
Source refers to the origin of the sugar produced. Sink refers to the organ that consumes or stores the sugar.
Flow is always from the source to the sink.
Phloem is loaded by active transport.

Answer 2

The resulting sugars are carried to the storage part through the sieve tube elements of the phloem.

When the leaf tissues photosynthesize, the sugar concentration increases in the cells surrounding the phloem. Sugars diffuse into the phloem which has a lower concentration of sugars.

Water diffuses into the phloem also. The resulting increase in pressure moves the sugar/water solution along from phloem cell to phloem cell. It's a combination of diffusion and pressure.

The place in the plant where more sugar is being made is the source. Phloem carries the sugars from the source to a sink. A sink is any place in the plant that is using or storing more sugar than it makes (rhizomes, roots, flowers, buds).