Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Vegetative propagation is a type of asexual reproduction where new plants are produced from vegetative parts such as roots, stems, leaves, and buds.
In stems, plants like potato have scars called 'eyes' which are actually buds. These buds can grow into new plants. Other examples include and which grow from rhizomes.
The plant (sprout leaf plant) contains buds in the margins of its leaves. If a leaf falls on moist soil, each bud can give rise to a new plant.
Roots of certain plants like sweet potato and can also give rise to new plants when buried in soil.
Artificial methods of vegetative propagation include 'Cutting' (e.g., , ), 'Layering' (e.g., ), and 'Grafting' (e.g., ).
Plants produced by vegetative propagation take less time to grow and bear flowers and fruits earlier than those produced from seeds. The new plants are exact copies of the parent plant, often referred to as .
📐Formulae
💡Examples
Problem 1:
A gardener wants to grow a new Rose plant quickly using a part of an existing healthy Rose plant. Which method should he use, and which part is essential for this process?
Solution:
The gardener should use the 'Stem Cutting' method. A piece of the stem containing at least one is essential.
Explanation:
In plants, the stem contains nodes where buds are present. When this 'cutting' is buried in moist soil, the bud develops into a shoot and roots emerge from the node, forming a new plant identical to the parent.
Problem 2:
Explain why a potato tuber is considered a 'stem' even though it grows underground, and how it helps in reproduction.
Solution:
A potato is a modified underground stem because it possesses (called 'eyes').
Explanation:
Each 'eye' of the potato is a vegetative bud. Under favorable conditions, these buds sprout to produce new potato plants. Since it uses a vegetative part (stem) rather than seeds, it is a form of vegetative propagation.