Plant Tissues Overview

Plant Tissues

• Plant tissues are categorized as meristematic or permanent.
• Meristematic tissues are based on their "capacity to divide."
• Permanent tissues are based on their "origin."
• Meristematic tissues are further classified as primary or secondary based on their "origin."
• Primary meristems include apical and intercalary meristems classified by "position."
• Secondary meristems include lateral meristems classified by "position."
• Apical meristems are located at the tips of stems and roots, promoting growth in length.
• Intercalary meristems are located at the base of nodes and leaf blades (primarily in monocots), promoting growth in length between nodes.
• Lateral meristems are located on the sides of stems and roots; responsible for secondary growth, increasing stem and root diameter.
• Procambium: a part of apical meristem that develops into primary vascular tissues (xylem and phloem).
• Monocots (like grasses) have intercalary meristems allowing leaves to regrow after mowing.
• Dicots have lateral meristems responsible for secondary growth, increasing stem and root diameter.

Meristematic Tissues

• Primary meristems are apical and intercalary.
• Secondary meristems are lateral.
• Types and placement are significant in determining growth patterns.

Apical Meristems

• Located at the tips of stems and roots.
• Responsible for primary growth, increasing stem and root length.

Intercalary Meristems

• Located between the tip and base of stems and leaves.
• Promotes growth in length, specifically between nodes.
• Essential for plants like grasses to recover from herbivory.

Lateral Meristems

• Located on the sides of stems and roots.
• Responsible for secondary growth, increasing stem and root diameter.
• Vascular cambium and cork cambium are examples.

Growth Types

• Primary growth: Increases the length of stems and roots.
• Secondary growth: Increases the diameter of stems and roots.

Summary Comparison (Apical vs. Intercalary vs. Lateral)

Dive into the fascinating world of plant tissues with this quiz. Learn about the differences between meristematic and permanent tissues, including their classifications and functions. Test your knowledge on primary and secondary meristems and their roles in plant growth.