Skip to content

#mycelium

6 public questions tagged with this topic.

Vegetative body of filamentous fungi is called

Filamentous fungi body consists of thread-like hyphae collectively forming mycelium representing vegetative thallus responsible for growth and absorption. Individual hyphae grow apically extending via Spitzenkorper vesicle supply center delivering cell wall precursors, branching to explore substrate efficiently. Mycelium can be extensive covering hectares in Armillaria. Single hypha denotes filament, sporangium is asexual spore container, ascus is sexual meiosporangium with ascospores. Mycelium performs nutrient absorption, anchorage and often perennial growth, while reproductive structures emerge from it under environmental triggers. Septal pores regulated by Woronin bodies and associated proteins prevent cytoplasmic loss upon wounding, enhancing hyphal survival and compartmentalized aging.

Ref: Campbell Biology 12th ed., Chapter 31: Mycelium Structure; NCERT Class 11 Biology - Fungi General Structure; NCBI Mycology - Mycelium

Which class of fungi is uniquely characterized by having an aseptate and coenocytic mycelium?

Fungal mycelia are usually divided by cross-walls called septa. However, according to NCERT Class 11 Biology, members of the class Phycomycetes (which includes forms like Mucor and Rhizopus) are distinctly characterized by an 'aseptate' mycelium. Because they lack cross-walls, their mycelium appears as continuous, elongated tubes densely filled with a highly multinucleate cytoplasm, a specialized condition biologically termed 'coenocytic'.

Ref: NCERT Class 11 Biology > Chapter 2: Biological Classification > 2.3 Kingdom Fungi

In fungi, a network of long, slender thread-like structures is called:

The basic structural body of a typical multicellular fungus consists of long, slender, microscopic thread-like structures known as hyphae. specifies that the extensive, interwoven network of these hyphae is collectively referred to as a 'mycelium'. This widespread mycelial network allows the fungus to efficiently penetrate its substrate and maximize the surface area for absorbing dissolved nutrients.

Ref: NCERT Class 11 Biology > Chapter 2: Biological Classification > 2.3 Kingdom Fungi