Cuscuta (Amarbel) — Example of a Parasitic Plant

Cuscuta (commonly known as Amarbel in Hindi, or Dodder in English) is one of the most well-known examples of a parasitic plant. A parasitic plant is one that cannot make its own food and instead depends entirely on another living plant (the host) for its nutrition.

Question (Click to Flip)

Is Cuscuta a partial or total parasite?

Answer

Cuscuta is a total (obligate) parasite because it has absolutely no chlorophyll and cannot perform even partial photosynthesis. It is 100% dependent on its host for all nutrition. In contrast, Mistletoe is a partial parasite because it has some chlorophyll and can make some food itself.

Card 1 of 1 free previews

Key Facts

Cuscuta belongs to the family Convolvulaceae (the same family as Morning Glories). There are over 200 species of Cuscuta found worldwide.

Why Cuscuta is a Parasite

Cuscuta is a complete (total/obligate) parasite. This means it cannot survive without its host plant. Here is why:

No Chlorophyll: Cuscuta has a yellowish or reddish colour and contains no chlorophyll. Without chlorophyll, it cannot perform photosynthesis and produce its own food.
Haustoria: Cuscuta penetrates its roots into the stems of the host plant through special structures called haustoria. These are tiny, root-like projections that enter the host's vascular tissue (xylem and phloem) and directly steal water, minerals, and prepared food (glucose) from it.
No True Roots: Cuscuta has no true roots connected to the soil. It is entirely dependent on the host.

Impact on the Host Plant

A plant infected with Cuscuta weakens significantly and may even die because the parasite continuously drains it of nutrients. For this reason, Cuscuta is considered a harmful agricultural weed that can seriously damage crops like legumes (pulses) and clover.

Questions and Answers

Is Cuscuta a partial or total parasite?+

Cuscuta is a **total (obligate) parasite** because it has absolutely no chlorophyll and cannot perform even partial photosynthesis. It is 100% dependent on its host for all nutrition. In contrast, Mistletoe is a **partial parasite** because it has some chlorophyll and can make some food itself.

More in Biology

🧬

Advantages of Sexual Reproduction over Asexual Reproduction

Learn the key advantages of sexual reproduction over asexual reproduction in Class 10 Biology — genetic variation, adaptation, and evolution.

🧬

What is the Full Form of AFB?

Learn the full form of AFB in medical biology. Understand the Acid Fast Bacillus test used primarily to detect Tuberculosis (TB) infections.

🧬

Names of All 5 Fingers in English and Hindi

Learn the correct names of all 5 fingers of the human hand in both English and Hindi. Find out which finger is the Index, Middle, Ring, and Pinky.

🧬

How are Alveoli Designed to Maximize the Exchange of Gases?

Get the perfect board exam answer for how Alveoli are structurally designed to maximize the exchange of Oxygen and Carbon Dioxide in human lungs.

🧬

Ammonotelic, Ureotelic, and Uricotelic Animals

Learn the difference between ammonotelic (fish), ureotelic (mammals), and uricotelic (birds/reptiles) animals. Excretory products in biology explained.

Study Smarter with Shinyu.ai

Turn this guide into revision flashcards, a practice exam, or an AI-generated podcast — free, no signup required.