Sucrose enters a phloem sieve-tube cell because of:
A process regulated by auxin
According to mass flow hypothesis, sucrose moves into the living phloem sieve tube cells by active transport.
Loading of sucrose into sieve tube cells is by (i)_______ and the unloading of sucrose from the sieve tube cells is by (ii)________.
What are major requirements for translocation of sucrose from leaves to sieve tubes of phloem tissue?