In this article we will discuss about the evolution of stele in a plant. Stele (= Greek word meaning a column) can be defined as the unit of vascular system that is made up of xylem, phloem, interfascicular tissues, medullary rays, pericycle and pith (if present). The term stele refers to the central core of plant axis and is restricted [...]
In this article we will discuss about the interxylary periderm in plants, explained with the help of suitable diagrams. The periderm, which is formed in the wood and medullary tissues, is described as interxylary periderm. The formation of periderm at the periphery of stems and roots, and its protective function are generally recognized. But the periderm in the wood and [...]
In this article we will discuss about the origin and activities of vascular cambium in plants. Origin of Vascular Cambium: In stems the vascular cambium and the primary vascular tissues differentiate from procambium. Procambium develops from the derivative cells of apical meristem. Transverse sections of a growing vegetative shoot apex reveal the presence of a cylinder of cells that are [...]