Question

Difference between holocarpic and eucarpic fungi biology discussion

Answer 1

In some of the lower fungi such as the chytrids, the thallus is more or less a spherical, single-celled structure (A). At the time of reproduction, it becomes a reproductive unit. The latter produces the asexual or sexual cells. Such fungi are called holocarpic. In them, the vegetative and reproductive stages do not occur together in the same thallus.
Plasmodiophora has a vegetative phase consisting of a naked, multi-nucleate, amoeboid mass of protoplasm (D). It is termed Plasmodium. The protoplast of the diploid Plasmodium cleaves to form the resting spores. The yeasts, which are related to the filamentous forms, also have a unicellular thallus (B). In the unicellular holocarpic forms (Synchytrium, Fig. 4-4D), the mycelium is absent.



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Answer 2

Difference between Holocarpic and Eucarpic

1. Holocarpic Denoting a fungus in which the entire thallus is differentiated into a reproductive sporangium when mature.

Eucarpic Denoting a fungus in which the thallus is differentiated into vegetative and reproductive regions.

Holocarpic (Holocarpism)

Whole thallus of fungus becomes converted into a reproductive cell*

Found among:

1. Chytridiomycota

2. Hyphochytridiomycota

3. Plasmodiophoromycota

4. Oomycota

5. Ascomycota

6. Basidiomycota**

7. Fungi imperfecti

2. Eucarpic (Eucarpism) Thallus

- differentiates into distinct vegetative and reproductive portions

- found among all divisions

trends to complexity (hyphal construction)

1. Monocentric (monocentrism)

Thallus consists of single reproductive cell attached to

substrate hyphae.