AP BIOLOGY

Detailed explanation-1: -Plant Physiology and Development Adventitious roots form from stem tissues, generally as a result of damage or removal of the primary root system. Many plants do produce some adventitious or crown roots naturally, and they add valuable lateral support to tall stems in cereals, for example.

Detailed explanation-2: -Post-embryonic roots can develop from stems, leaves or other vegetative non-root organs, either constitutively or in response to stress. Such roots are referred to as adventitious, a term that etymologically indicates their unusual and surprising origin (Figure 1) [1].

Detailed explanation-3: -Adventitious roots are plant roots that form from any nonroot tissue and are produced both during normal development (crown roots on cereals and nodal roots on strawberry [Fragaria spp.]) and in response to stress conditions, such as flooding, nutrient deprivation, and wounding.

Detailed explanation-4: -If an adventitious plant is pulled up, it can grow new roots, wherever it is placed as long as good conditions exist. Some examples of adventitious plants are: Ivy, Horsetails, Oak trees and Cypress.