What are the major modifications of stem?
What are the major modifications of stem?
The stem modification that has enlarged fleshy leaves emerging from the stem or surrounding the base of the stem is called a bulb; it is also used to store food. Aerial modifications of stems include tendrils, thorns, bulbils, and cladodes..
What are the modifications of stem give examples?
Stem modification
- 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.
What are the three modifications of stem?
It is modified into three important types: Underground Modification of Stem. Sub-aerial Modification of Stem. Aerial Modification of Stem.
What is stem modified?
The stem is the plant axis that bears shoots, leaves, buds, and the basal end-roots. In some plants, the stem is modified to perform other functions such as storage of food, support, vegetative propagation, and protection. These are simply known as modified stems and can be categorized into various classes.
What is root modification?
Root Modifications. In some plants, the roots change their shape and get modified to absorb and transport water and minerals from the soil to different parts of the plant. They are also modified for support, food storage, and respiration. The root modifications perform two major functions- Physiological and Mechanical.
What are the underground modification of stem?
Underground stems are modified plants that derive from stem tissue but exist under the soil surface. They function as storage tissues for food and nutrients, propagation of new clones, and perennation (survival from one growing season to the next). Types include bulbs, corms, rhizomes, stolons, and tubers.
What are the examples of aerial stem?
Aerial stem structures that undergo modifications to perform these special functions include tendrils, thorns, hooks, phylloclade, tuberous stems and bulbils.
How are stem modified to perform different functions?
Modification of Stems for the Storage of Food: Underground stems of potato, ginger, turmeric, zaminkand, colocasia are modified to store food in them. They also act as organs of perennation to tide over conditions unfavourable for growth. Besides these, stems can also be modified for vegetative propagation.
How is stem Modified give its special functions?
Answer: Stem or its branches get modified into green thread like leafless structures called tendrils which are meant for climbing. A scale leaf is always present at the point of branching of the tendril. The stems are modified to perform the function of storage of food, support, protection and vegetative propagation.
What is root stem modification?
Plant has different parts like root, stem and leaves. Each of them has a separate function to perform. However in special cases, roots may get modified to store food, help in respiration and provide support. Depending on the need and type of plant, the adventitious or tap roots may be modified.
What are the types of root modifications?
Modifications of Roots for Physiological and Mechanical Functions
- Storage Roots: Storage roots become fleshy by the accumulation of stored up food.
- Epiphytic or Aerial Absorbing Roots:
- Assimilatory Roots:
- Reproductive Roots:
- Respiratory Roots or Pneumatophores:
- Sucking Roots or Haustoria:
- Mycorrhizal Roots:
What are the four types of underground modifications?
The types are: 1. Rhizome 2. Tuber 3. Corm 4.
What are stem modifications?
To perform specialized functions the stem and the aerial branches get modified in different ways which is called as stem modifications. These modifications are of 3 kinds, viz., underground, sub-aerial and aerial.
What is meant by aerial modification of stem?
Aerial Modifications of Stem. The stems are modified into aerial forms to perform important functions such as climbing, food storage, vegetative propagation, and protection. The stem modifications are as follows: The stem gets modified into a thread like leafless structures called tendrils.
What are the different types of underground stem modifications?
It is modified into three important types: Some underground stems are modified for food storage and to survive under unfavourable conditions. Some underground stem modifications are: These are non-green with distinct nodes and internodes. There are auxiliary as well as apical buds. These are brownish in colour.
What are creepers and their subaerial stem modifications?
Short aerial branches and adventitious roots develop at the nodes. Detachment of entire branch or a node can develop into a new plant. The plants are commonly known as creepers and their subaerial stem modifications meant for vegetative propagation. The weak sub-aerial stems are modified into following four types:
