Medicinal Plants Lecture 5

Medicinal Plants Lecture 5

• The lecture covers the anatomy of primary plant organs
• The lecture includes leaves, stems, and roots
• The plant's leaves function as the primary photosynthetic system
• Stems support the plant body, transport nutrients, and offer protection against predators/diseases
• Roots absorb water and dissolved nutrients, anchor plants, and protect against soil bacteria and fungi

Plant Organ Anatomy

• Diagrams of transverse sections (TS) of dicot and monocot stems are provided—highlighting differences between dicot and monocot in vascular bundles
• Dicot stems exhibit vascular bundles arranged in a ring
• Monocot stems display a scattered arrangement of vascular bundles
• Dicot roots exhibit a central vascular cylinder
• Monocot roots exhibit scattered vascular bundles

Leaf Anatomy

• Leaf structure, including different layers like palisade mesophyll, spongy mesophyll, vascular tissue, and epidermal layers, are discussed
• Diagrams of both monocot and dicot leaf anatomy are provided
• Dicot leaf typically shows differentiated palisade and spongy mesophyll layers—bicollateral vascular bundles
• Monocot leaf does not clearly distinguish between palisade and spongy layers—closed collateral vascular bundles
• Stomata aid in gas exchange
• Guard cells regulate stomatal opening and closing
• Internal structure of monocots & dicots is compared

Leaf Venation

• Information on leaf venation is presented, including parallel and reticulate venation
• Parallel venation is typical of monocots
• Reticulate venation is characteristic of dicots

Quiz Questions

• Quiz questions ask students to label parts of transverse sections of roots and stems
• Quiz questions are about identifying vascular bundle arrangement (open/closed) in dicots and monocots
• Quiz questions focus on parts of dicots & monocots
• Questions assess understanding of leaf structure

This lecture covers the anatomy of primary plant organs, focusing on leaves, stems, and roots. It includes detailed diagrams of dicot and monocot structures, highlighting differences in vascular arrangements and leaf anatomy. Join us to enhance your understanding of plant organ functions and structures.