Plant Structure and Growth
Introduction
Concept 1: Basic Plant Structure
Concept 2: Plant Cell Structure
Review (1 page)
Concept 3: Plant Tissue Systems
Concept 4: Dermal Tissues
Concept 5: Ground Tissues
Review (2 pages)
Concept 6: Vascular Tissues
Practice (1 page)
Review (2 pages)
Concept 7: Primary Growth
Concept 8: Primary Growth of Stems
Practice (1 page)
Concept 9: Structure of Young Stems
Practice (1 page)
Concept 10: Primary Growth of Roots
Concept 11: Structure of Young Roots
Practice (1 page)
Concept 12: Monocot Stems and Roots
Concept 13: Leaf Structure
Practice (1 page)
Concept 14: Lateral Meristems
Concept 15: Secondary Growth
Concept 16: Structure of Woody Stems
Practice (2 pages)
Self-Quiz
Concept 7: Primary Growth
Primary growth is the lengthening of the stem and roots.
All plant growth occurs by cell division and cell elongation. Cell division occurs primarily in regions of undifferentiated cells known as meristems.
Cell division in the apical meristems and subsequent elongation and maturation of the new cells produces primary growth.
The other type of growth, secondary growth, is the increase in girth of stems and roots.
Primary Growth and the Location of Apical Meristems
Cell Elongation
Animate
Animate
Notice that the internode distance increases during primary growth (elongation), but then this distance becomes set.
