What is the Difference Between Photobiont and Mycobiont?

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The main difference between photobiont and mycobiont lies in their roles and components within a lichen. A lichen is a composite organism made up of two organisms in a symbiotic relationship. Here are the key differences between photobiont and mycobiont:

  • Photobiont: This is the photosynthetic component of the lichen, which can be either a green alga or a cyanobacterium. The main function of the photobiont is to undergo photosynthesis, providing food for the fungi.
  • Mycobiont: This is the fungal component of the lichen. The mycobiont is responsible for providing shelter and absorbing water. It usually belongs to the ascomycete or basidiomycete group.

In summary, the photobiont refers to the algal partner that handles the photosynthesis, while the mycobiont refers to the fungal partner that provides shelter and absorbs water in a lichen.

Comparative Table: Photobiont vs Mycobiont

Here is a table comparing the differences between photobiont and mycobiont:

Feature Photobiont Mycobiont
Definition The photosynthetic component of a lichen, responsible for producing carbohydrates or food through photosynthesis. The fungal component of a lichen, mainly an ascomycete or a basidiomycete.
Role in Lichen Lives together with the mycobiont in a mutualistic association, benefiting both organisms. Lives together with the photobiont in a mutualistic association, benefiting both organisms.
Symbiosis Non-parasitic; both the photobiont and mycobiont benefit from the relationship. Non-parasitic; both the photobiont and mycobiont benefit from the relationship.
Location Usually found in parasitic relationships. Usually found in parasitic relationships.