Modifications of Root
Study of roots modified for storage, support (prop, stilt roots), and respiration (pneumatophores) with examples.
What is Modifications of Root?
Adventitious roots that grow vertically upwards from the soil surface, primarily for gaseous exchange in plants growing in waterlogged or marshy environments.
Key points
- Identify different types of root modifications.
- Explain the functions of modified roots.
- Provide examples of plants exhibiting specific root modifications.
Common exam trap
Confusing prop roots with stilt roots.
Definitions
- Term
Pneumatophores
- Meaning
Adventitious roots that grow vertically upwards from the soil surface, primarily for gaseous exchange in plants growing in waterlogged or marshy environments.
- Term
Prop roots
- Meaning
Adventitious roots that grow downwards from the branches of a tree, providing additional support to the main stem, characteristic of large trees like the banyan.
- Term
Stilt roots
- Meaning
Adventitious roots that arise from the lower nodes of the stem and grow obliquely downwards into the soil, providing support to plants with weak stems, such as maize and sugarcane.
Learning objectives
Identify different types of root modifications.
Explain the functions of modified roots.
Provide examples of plants exhibiting specific root modifications.
Prerequisites
Basic structure and function of a typical root.
Understanding of taproot and fibrous root systems.
Concept of adventitious roots.
Common mistakes
Confusing prop roots with stilt roots.
Incorrectly identifying the type of root (taproot vs. adventitious) that is modified.
Forgetting the specific function of pneumatophores (respiration, not absorption).
Keywords
Root modification
Storage root
Prop root
Stilt root
Pneumatophore
Mangrove
Banyan
Carrot
Sweet Potato
Practice preview
Which of the following is an example of a root modified for storage of food?…
easy
A plant exhibits roots that grow vertically upwards from the soil surface, bearing numerous pores (lenticels) on their surface. These roots are typically found in plants inhabiting waterlogged, anaerobic soil conditions.…
hard
Pneumatophores are characteristic modifications of roots found in plants growing in:…
easy