Topic #2: Longitudinal Section of a Seed Cone

• Identify the parts of the Longitudinal Section of a Seed Cone:

  A) ovuliferous scale

  B) cone axis

  C) sterile bract

  D) ovule

  E) megaspore

  
• Sterile Bract or Scales

  • A specialized leaf-like structure found in conifer seed cones for protection
• Sterile Bract or Scales

  • It emerges below each ovuliferous scale on the cone.
• Sterile Bract or Scales

  • doesn’t directly participate in seed production but plays a supporting role in cone development.
• Ovuliferous Scale

  • One of the large, woody specialized leaves that form the female cone of conifers and related trees
• Ovuliferous Scale

  • It is a scale that bears the ovules, which develop into seeds
• Cone Axis

  • line passing through the vertex of a cone and the center of its base
• Ovule

  • Contains the female gametophyte and are found on the ovuliferous scales of the cone.
• Megaspore

  • The larger spore produced in heterosporous plants
• Megaspore

  • It germinates through meiosis and gives rise to a female gametophyte