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HomeHomework HelpbotanyPrimary vs Secondary Growth

Primary vs Secondary Growth

Primary growth in plants refers to the increase in length and the formation of new tissues at the tips of roots and shoots, primarily driven by apical meristems. In contrast, secondary growth involves the thickening of stems and roots through the activity of lateral meristems, such as the vascular cambium and cork cambium, leading to the development of wood and bark.

intermediate
2 hours
Botany
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Overview

Primary and secondary growth are essential processes in the life of plants, allowing them to adapt and thrive in their environments. Primary growth occurs at the tips of roots and shoots, enabling plants to grow taller and access sunlight. In contrast, secondary growth occurs in woody plants, allowi...

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Key Terms

Apical Meristem
The region at the tips of roots and shoots where active cell division occurs.

Example: The apical meristem allows the plant to grow taller.

Lateral Meristem
Meristematic tissue that contributes to the thickness of the plant.

Example: The vascular cambium is a type of lateral meristem.

Xylem
Tissue responsible for water and nutrient transport from roots to leaves.

Example: Xylem cells are essential for plant hydration.

Phloem
Tissue that transports sugars and nutrients produced in the leaves.

Example: Phloem helps distribute food throughout the plant.

Growth Rings
Layers of wood produced in a year, indicating the age of a tree.

Example: Counting growth rings can reveal a tree's age.

Meristematic Tissue
Tissue composed of undifferentiated cells capable of division.

Example: Meristematic tissue is found in growing regions of plants.

Related Topics

Plant Anatomy
Study of the internal structure of plants, including tissues and organs.
intermediate
Photosynthesis
Process by which plants convert light energy into chemical energy.
beginner
Plant Physiology
Examination of the functions and processes of plants.
intermediate
Ecology of Forests
Study of forest ecosystems and the interactions within them.
advanced

Key Concepts

Apical MeristemLateral MeristemWood FormationGrowth Rings