In some plants stems undergo modification, justify this statement with atleast three examples
Answers
Explanation:
Stems of various plants have undergone modifications to perform different functions.
Stems of various plants have undergone modifications to perform different functions.1. Underground stems or storage stems:
Stems of various plants have undergone modifications to perform different functions.1. Underground stems or storage stems:Examples: Rhizomes, Corms, tubers
Stems of various plants have undergone modifications to perform different functions.1. Underground stems or storage stems:Examples: Rhizomes, Corms, tubersIn ginger and banana, the underground stem is called as a rhizome. The underground stem in Colocasia (arvi) is known as corm. Rhizomes and corms are underground stems, modified for the storage of food. Also, these stems help in vegetative reproduction of these plants. The tips of the underground stem in potato plants become swollen due to the accumulation of food. The potato is a tuber that helps in the storage of food and bears eyes on it. Subtended by a leaf scar, these eyes bear buds that give rise to new plants.
Answer:
In some plants the stems are modified to perform the function of storage of food, support, protection and vegetative propagation.
For food storage: Rhizome (ginger), Tuber (potato), Bulb (onion), Corm (colocasia).
For support: Stem tendrils of watermelon, grapevine, cucumber.
For protection: Axillary buds of stem of citrus, Bougainvillea get modified into pointed thorns. They protect the plants from animals.
For vegetative propagation: Underground stems of grass, strawberry, lateral branches of mint and jasmine.
For assimilation of food: Flattened stem of Opuntia contains chlorophyll and performs photosynthesis
The stem is the part of the plant that provides support and helps in conduction.
In some plants, the stem is modified for some other functions such as:
Underground stem modification- in such modification, stems remain under the soil and store the large amount of food e.g., potato, ginger etc.
Sub-aerial modification- in such modification, week stems lie horizontally on the ground and develop adventitious roots that help in vegetative propagation e.g., grass, pumpkin etc.
Aerial stem modification- in such modification, axillary buds are modified to thron and tendril for protection and support e.g., rose, pea etc
Explanation:
The stem is the part of the plant that provides support and helps in conduction.
In some plants, the stem is modified for some other functions such as:
Underground stem modification- in such modification, stems remain under the soil and store the large amount of food e.g., potato, ginger etc.
Sub-aerial modification- in such modification, week stems lie horizontally on the ground and develop adventitious roots that help in vegetative propagation e.g., grass, pumpkin etc.
Aerial stem modification- in such modification, axillary buds are modified to thron and tendril for protection and support e.g., rose, pea etc
The stem is the part of the plant that provides support and helps in conduction.
In some plants, the stem is modified for some other functions such as:
Underground stem modification- in such modification, stems remain under the soil and store the large amount of food e.g., potato, ginger etc.
Sub-aerial modification- in such modification, week stems lie horizontally on the ground and develop adventitious roots that help in vegetative propagation e.g., grass, pumpkin etc.
Aerial stem modification- in such modification, axillary buds are modified to thron and tendril for protection and support e.g., rose, pea etc
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