BIOM-360 Lecture Notes - Lecture 14: Alveolate, Actinobacteria, Mycelium
2 May 2018
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Review from Unit I Exam:
Which of the following best exemplifies bacterial cell differentiation?
Filamentous growth and spore information in Actinobacteria.
If you look at a drop of ocean water, which organisms are you most likely to find?
Alveolata
Fungal Structure
Filamentous fungi
Multicellular, grow in hyphae (long thin filaments) that form mycelium (network).
Live immersed in their food
Apical growth of hyphae
Enzyme production synchronized with nutrient need to avoid waste
Final degradation steps performed by cell wall enzymes (monomers readily available)
Some produce antibiotics and other metabolites
Hyphae can have septa that define cell compartments.
Cell continuum = when hyphae are aseptate with many nuclei
Septa have pores for organelle mvt (but not nuclei)
Fungal Reproduction
Yeasts
Unicellular, reproduce asexually by budding and sexually through spores.
Mitotic cell division, cloning, asexual.
Filamentous Fungi
Reproduce asexually and sexually
Sexual → mycelial fermentation and mitotic spores
Asexual → with a diploid phase and meiosis
