Title Part 4 Anatomy of Dicot and Monocot Plants.pdf ✅

TRANSVERSE SECTION OF DICOT STEM The transverse section of a dicot stem reveals the following structures Pericycle ➢ Pericycle is present below the endodermis and composed of sclerenchymatous and parenchymatous cells ➢ Sclerenchyma forming like a cap on the bundle, so called as bundle caps. ➢ Parenchymatous present between the two bundles ➢ Pericycle has following functions: mechanical support and serves to store food Vascular bundles ➢ These are arranged in a ring and inner to the pericycle ➢ Vascular bundle is conjoint, collateral, open type ➢ Vascular bundles are made up of: xylem, phloem and cambium ➢ Xylem - helps in conduction of sap ➢ Phloem - conducts the foods ➢ Cambium - lies in between xylem and phloem and responsible for secondary growth Pith ➢ Occupies central portion of the stem ➢ Composed of thin walled parenchymatous, rounded or polygonal, with or without intercellular spaces ➢ The extension of pith between vascular bundles are called as pith ray or medullary rays. ➢ Pith has following functions: food is stored in this region.