Question

Fungus without any mycelium is
A. Albugo
B. Agaricus
C. Puccinia
D. Saccharomyces

Answer 1

Mycelium is the vegetative part of fungus which consists of mass of branching, thread-like hyphae and fungus containing such mycelium are usually found in soil or on other substrates.

Complete Answer:
Mycelium is formed when a single spore germinates into a monokaryotic mycelium. This monokaryotic mycelium cannot reproduce sexually and interacts with another mycelium which forms fruiting bodies of plants like mushrooms. A mycelium may be minute, in the form of a colony or even spread across acres.

Mycelium is beneficial for plants as it absorbs nutrients from the environment for the plants. For this the hyphae of the mycelium secretes enzymes that break down the food into smaller molecules which are then absorbed by mycelium through diffusion and active transport.
Mycelia are also important for their role in the decomposition of plant material.

Let us analyze the options to find out the correct answer.
Option A: Albugo is a genus of plant-parasite oomycetes which are not true fungi. Albugo has a lot of features similar to that of a fungi. They have the presence of mycelium in them just like fungi. Their hyphae is intercelular and aseptate.Therefore, this is the incorrect option.

Option B: Agaricus is a genus of mushroom which contains both edible and poisonous species. The mycelium present in them are subterranean and it has the tendency to grow in all the directions.Therefore, this is the incorrect option.

Option C: Puccinia is a genus of fungi and are obligate plant pathogens. The plant body of Puccinia is called mycelium which can be dikaryotic and monokaryotic. The hyphae are septate, intercellular and branched.Therefore, this is the incorrect option.

Option D: Saccharomyces is a genus of fungi which also includes yeast. However, they do not have mycelium.Therefore, this is the correct option.

, the correct option is A) Saccharomyces.

Note: Mycelium is an important food source for many soil invertebrates. Mycelium also confers resistance to some plant pathogens. They increase the efficiency of water and nutrient absorption of most plants.