Adventitious

Definition

Adventitious describes structures that develop in unusual or unexpected locations. In plants, it often refers to roots that grow from non-root tissues such as stems or leaves.

5 Must Know Facts For Your Next Test

1. Adventitious roots can arise from stem cuttings and are crucial for vegetative propagation.
2. These roots help in stabilization and nutrient absorption, particularly in adverse conditions.
3. In seedless vascular plants, adventitious structures can be a response to injury or environmental stress.
4. They play a significant role in the colonization of new habitats by providing additional support and resource acquisition.
5. Adventitious growth is common in ferns and other seedless vascular plants, aiding in their spread and survival.

Review Questions

• What are adventitious roots and where do they typically form?
• How do adventitious structures benefit seedless vascular plants?
• Why might a plant develop adventitious roots under stressful conditions?

Related terms

Rhizome:

An underground horizontal stem that often produces roots and shoots at nodes.

Sporophyte: The diploid, spore-producing phase in the life cycle of a plant.

Stolon: A horizontal above-ground stem that can produce new plants at its nodes.