dicot

Examples of dicot in the following topics:

• Development of the Seed

  • In dicots, the seed coat is further divided into an outer coat, known as the testa, and inner coat, known as the tegmen.
  • The storage of food reserves in angiosperm seeds differs between monocots and dicots .
  • In endospermic dicots, the food reserves are stored in the endosperm.
  • The structures of dicot and monocot seeds are shown.
  • Dicots (left) have two cotyledons.

• Diversity of Angiosperms

  • Angiosperm diversity is divided into two main groups, monocot and dicots, based primarily on the number of cotyledons they possess.
  • Monocots include grasses and lilies while eudicots or dicots form a polyphyletic group.
  • Members in these groups all share traits from both monocot and dicot groups.
  • Eudicots, or true dicots, are characterized by the presence of two cotyledons in the developing shoot.
  • (a) Rice, (b) wheat, and (c) bananas are monocots, while (d) cabbage, (e) beans, and (f) peaches are dicots.

• Leaf Structure and Arrangment

  • Monocots and dicots differ in their patterns of venation .
  • In dicots, however, the veins of the leaf have a net-like appearance, forming a pattern known as reticulate venation.
  • (b) The netlike venation in this linden (Tilia cordata) leaf distinguishes it as a dicot.

• Double Fertilization in Plants

  • In dicots (eudicots), the developing embryo has a heart shape due to the presence of the two rudimentary cotyledons.
  • In non-endospermic dicots, such as Capsella bursa, the endosperm develops initially, but is then digested.

• Stem Anatomy

  • When the stem is viewed in cross section, the vascular bundles of dicot stems are arranged in a ring.
  • The (a) colorized scanning-electron micrograph shows a closed stoma of a dicot.
  • In (a) dicot stems, vascular bundles are arranged around the periphery of the ground tissue.

• The Evolution of Roots in Seedless Plants

  • Dicots (flowering plants with two embryonic seed leaves) have a tap root system while monocots (flowering plants with one embryonic seed leaf) have a fibrous root system.
  • In dicot roots, the xylem and phloem of the stele are arranged alternately in an X shape, whereas in monocot roots, the vascular tissue is arranged in a ring around the pith.

• Types of Root Systems and Zones of Growth

  • Dicots have a tap root system, while monocots have a fibrous root system, which is also known as an adventitious root system.

• Primary and Secondary Growth in Stems

  • Secondary growth, or "wood", is noticeable in woody plants; it occurs in some dicots, but occurs very rarely in monocots.

• Leaf Structure, Function, and Adaptation

  • Below the epidermis of dicot leaves are layers of cells known as the mesophyll, or "middle leaf."

• The Life Cycle of an Angiosperm

  • The zygote develops into an embryo with a radicle, or small root, and one (monocot) or two (dicot) leaf-like organs called cotyledons.