Question

What is siphonostele?

Answer 1

Siphonostele:

1. The stele is a central section of the root and stem of the vascular plants which is made up of tissues produced from the procambium.
2. Siphonostele is a protostele or medullated protostele with a nonvascular pith in the center that lacks leaf gaps.

Types of siphonostele:

1. Amphiphloic siphonostele: In this type of siphonostele, the xylem is encircled on both sides by phloem, pericycle, and endodermis. It is commonly found in Equisetum and Osmunda.
2. Ectophloic siphonostele: In this type of siphonostele in which the pericycle, xylem, phloem, and endodermis all surround the central pith.