is called polyarch. Xylem is in exarch condition, the tissue which is present between the xylem and the phloem, is called conjunctive tissue. In maize, the conjunctive tissue is made up of sclerenchymatous tissue. Anatomical differences between dicot root and monocot root S.No.
Characters Dicot root Monocot root . Pericyle Gives rise to lateral roots, phellogen and a part of vascular cambium. Gives rise to lateral roots only. .
Vascular tissue Usually limited number of xylem and phloem strips. Usually more number of xylem and phloem strips, . Conjunctive tissue Parenchymatous; Its cells are differentiated into vascular cambium. Mostly sclerenchymatous but sometimes parenchymatous.
It is never differentiated in to vascular cambium. . Cambium It appears as a secondary meristem at the time of secondary growth. It is altogether absent.
. xylem Usually tetrach Usually polyarch Stele The central part of the stem inner to the endodermis is known as stele . It consists of pericyle, vascular bundles and pith. In dicot stem, vascular bundles are arranged in a ring around the pith.
This type of stele is called eustele. Pericycle Pericycle is the layers of cells that occur between the endodermis and vascular bundles. In the stem of sunflower (Helianthus), a few layers of sclerenchyma cell occur in patches outside the phloem in each vascular bundle. This patch of sclerenchyma cell is called Bundle cap or Hardbast .
The bundle caps and the parenchyma cells between them constitute the pericycle in the stem of sunflower. Vascular Bundles The vascular bundles consist of xylem, phloem and cambium. Xylem and phloem in the stem occur together and form the vascular bundles. These vascular bundles are Wedge shaped .
They are arranged in the form of a ring. Each vascular bundle is conjoint, collateral, open and endarch . Phloem Phloem consists of sieve tubes, companion cells and phloem parenchyma. Phloem fibres are absent in the primary phloem.
Phloem conducts organic food materials from the leaves to other parts of the plant body. Cambium Cambium consists of brick shaped and thin walled meristematic cells. It is one to