About Lesson
Transcellular streaming (Thaine, 1964)
The solute passes in the sieve tube in straight strands which are tubular and continuous from one tube to another through sieve pores. These transcellular strands are proteinaceous and act as bidirectional translocation of solutes through rhythmic expansions. Metabolic energy is used for this purpose.
Objections:
It failed to explain the induction of ATP in a sieve tube.
Such types of transcellular strands have not been observed under an electron microscope.
