Types of Stem

Here, we will discuss the terms that will help you understand what a stem is. Generally, the stem is the central part of the plant. A stem allows the plant to grow at a reasonable rate. If the plant’s stem is not good, then the growth of a plant will be restricted. Let’s learn more about it below. We will also see how to replace the quill stem.

What does the term ‘stem’ mean?

The stem is the main part of the plant that supports the plant’s leaves, flowers, and fruits. Stems use sunlight for the procedure of photosynthesis. There are different types of stems.

  • The two main parts, Phloem and Xylem, allow the plant to get water. 
  • The stems help store the plant’s food, nutrients, and water.
  • The tissue of cells helps in the creation of living tissues.
  • Many types of stems are present such as aerial stem, underground stem, and subaerial stem.

What are the different functions of the stem?

When we talk about the stem, it performs various functions to help the plant grow. The plant’s growth is due to the stem. It helps maintain the food, water, tissue maintenance, etc. Here, we discuss some central parts of the stem. The primary functions of the stem are discussed below:

  1. Leaves:
  • The stem allows the plant to grow better.
  • The stem gives support to the flowers, leaves, and fruits.
  • With stem support, the plant grows at a reasonable rate.
  1. Water & Minerals:
  • Water and minerals are a significant part of the plant. 
  • Mainly two elements, Phloem and Xylem, help create the water bundles for the plant. 
  • Both these allow water resistance within the plant.
  1. Storage of food:
  • Stems have many functions. One of them is to store food.
  • Some parts of a plant undergo modification for water and food storage.
  1. Photosynthesis process:
  • Green stems perform the task of photosynthesis.
  • These stems carry chloroplast and perform the photosynthesis process.
  1. Other processes:
  • The stem of a plant also aids in other plant processes.
  • The different processes of a plant include fertilisation, dispersion, and pollination of seeds.
  1. Vegetative Propagation:
  • Vegetative Propagation also helps in the modification of a plant.
  • It is mainly the form of asexual reproduction of plants.

 Some modification of stem

  • In some plants the stem gets modified to carry out some specific functions. These modifications may be aerial, sub-aerial or underground.
  • Stem tendril: Branch forming bud forms coiled filamentous structures and help in climbing e.g. Cucurbita, pumpkin.
  • Stem Thorns: Buds present in axils of leaves or apex of stem transform into hard, straight and pointed structures. They arise endogenously and are called thorns, e.g. Carrisa  and Bougainvillea.
  • Stolon: Branches arise from the basal part of the stem and grow horizontally above or under the ground. Ultimately these branches arch down to meet the soil surface where daughter plants are developed, e.g. jasmine,Strawberry.
  • Sucker:  In it the main stem grows in the soil but branches develop from nodes above the soil. Eg. Mint, Pineapple, Chrysanthemum  
  • Underground food storage stem-potato ,ginger,turmeric,colocasia.           

What are the types of the stem?

The stem allows the growth of a plant. Different types of stems perform different tasks for the plant. Some types of stems are listed below:

  1. A. Aerial Stems
  2. Subaerial Stem
  3. Underground stems

Different Parts of a Plant Stem:

  • Node: A node is a point from which leaves, buds, ethereal roots, and branches are formed.
  • Internode: The space between the two ensuing nodes is called an internode. It is also called the “internodal” district. It urges the plant to create and keeps it upstanding.
  • Apical Bud: Apical buds are arranged at the tip, or summit, of the stem where principle development of the plant occurs. It is also called the terminal bud.
  • Axillary Bud: An axillary bud is often situated at the leaf axil or the space between the foundation of a leaf and the stem. Axillary buds bring forth a shoot that might be vegetative (branch) or regenerative (blossoms). It is, in some cases, named the parallel bud.
  • Petiole: The thin tail by which the leaf is connected to the stem node is named a petiole. The petiole is normally known as the leaf tail. A leaf with a petiole is termed a petiolate leaf, while leaves without them are called sessile or stalkless.

Conclusion:

Stem is a part of a plant which lies above from the  surface of soil i.e. it shows negative geotropic growth.The stem is the central part of the plant that helps a plant grow.  It has nodes and internodes. Branches, leaf, flower buds and bracts are developed from nodes.The main function of the stem is spreading out branches bearing leaves, flowers and fruits. It conducts water, minerals and photosynthesizes. Some stems perform the function of storage of food, support. Protection of vegetative propagation.There are different types of stems. Shrubs are medium-sized plants with woody stems and multiple branches growing from their roots. A tree’s trunk is broad and solid, bearing numerous branches. Plants like agricultural crops have a single life cycle (rice, groundnut, etc.). Biennials have two-year life cycles (radish, cabbage). Stems assist in vegetative development and store additional nutrients.

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