What is pericycle and stele?
In a vascular plant, the stele is the central part of the root or stem containing the tissues derived from the procambium. These include vascular tissue, in some cases ground tissue (pith) and a pericycle, which, if present, defines the outermost boundary of the stele.
Is pericycle part of the stele?
The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants.
What is the difference between stele and vascular bundle?
Stele is the central part of the root or stem. It includes vascular bundle ground tissue and pericycle (if present). Vascular bundle is composed of xylem and phloem and is a part of the stele.
What is a pericycle in plants?
Pericycle is a primary tissue of plant roots and is the site for the initiation of lateral roots and two secondary meristems, the vascular cambium and cork cambium (phellogen). In this article the characteristics of the pericycle related to each of its functions are reviewed.
What is stele and explain its types?
The term stele refers to the central cylinder of vascular tissues consisting of xylem, phloem, pericycle and sometimes medullary rays with pith (Figure 2.37). There are two types of steles. 1. Protostele.
Which is part of stele?
The stele consists of vascular tissue, ground tissue or pith, and a pericycle. The pericycle mainly forms the outermost boundary of the stele. Therefore, the stele can be explained as the vascular bundle. The stele is composed of mainly three tissues which are the pericycle, the xylem, and the phloem.
What is pericycle in plants?
Pericycle is a primary tissue of plant roots and is the site for the initiation of lateral roots and two secondary meristems, the vascular cambium and cork cambium (phellogen).
What do you mean by pericycle?
Definition of pericycle : a thin layer of parenchymatous or sclerenchymatous cells that surrounds the stele in most vascular plants.
What is the difference between Protoxylem and Metaxylem?
Protoxylem is the primary xylem that develops first during primary growth. Metaxylem is formed after the protoxylem during primary growth in the xylem. It grows before the maturation of other plant organs. It grows after the maturation of all plant organs.