Curso EXANI II 2024 23 Biología Biodiversidad: Proceso metabólico de los hongos #17

Metabolic Processes of Fungi

Introduction to Metabolism

• The session focuses on the metabolic processes of fungi, skipping the structure of mammals as previously discussed.

• Metabolism encompasses all chemical reactions that maintain life in cells and organisms, divided into catabolism (energy-producing) and anabolism (energy-consuming for synthesis).

Types of Metabolism in Fungi

• Catabolism involves breaking down molecules to release energy, while anabolism synthesizes complex molecules from simpler ones using energy.

• Unlike plants, fungi lack chlorophyll and cannot photosynthesize; they obtain nutrients from decomposing organic matter or symbiosis with other organisms.

Fungal Metabolic Processes

• Fungal metabolism includes biochemical processes essential for energy acquisition, cellular growth, biomolecule synthesis, and environmental response.

• It is categorized into primary metabolism (essential for growth and reproduction) and secondary metabolism (producing non-essential compounds with specific functions).

Primary vs. Secondary Metabolism

• Primary metabolism includes respiration, nutrient absorption, ATP production, and synthesis of essential compounds like amino acids and nucleic acids.

• Secondary metabolism produces compounds like antibiotics (e.g., penicillin), alkaloids (e.g., psychotropic substances), which have diverse ecological roles.

Key Metabolic Processes in Fungi

Nutrient Absorption

• Fungi are heterotrophic organisms that secrete enzymes to decompose complex organic matter into simpler compounds for nutrient absorption through hyphae.

Respiration

• Fungi utilize aerobic respiration to fully decompose organic compounds using oxygen to produce ATP via electron transport chains.

• Anaerobic respiration occurs without oxygen; it uses alternative inorganic components or organic compounds as electron acceptors.

Fermentation

• Some fungi can ferment under anaerobic conditions to generate energy by partially decomposing organic compounds without oxygen.

Fermentation and Metabolic Processes in Fungi

Fermentation in Fungi

• The primary goal of fermentation in fungi is energy generation and the regeneration of coenzymes necessary for ATP production under low oxygen conditions.

• Fermentation has industrial applications, including the production of food, beverages, and chemicals such as bread, beer, wine, and vinegar.

Synthesis of Biomolecules

• Fungi synthesize various essential biomolecules for growth and cellular function, including macromolecules like proteins from amino acids.

• The main objective of biomolecule synthesis is to maintain structural integrity and functionality of cells while fulfilling specific roles in cellular signaling, nutrient transport, and metabolic regulation.

• This synthesis also plays a crucial role in fungal growth and reproduction, enabling adaptation and survival in their environment.

Carbohydrate Metabolism

• Fungi utilize different metabolic pathways to process carbohydrates by breaking down complex carbohydrates into simpler sugars for energy or other molecular synthesis.

• Complex carbohydrates are decomposed into simple sugars through extracellular enzymes; these sugars are then absorbed by fungi for glycolysis to produce ATP and intermediates for further synthesis.

• Carbohydrates can be stored as glycogen for energy reserves; fungi can also ferment sugars anaerobically to produce products like ethanol.

Summary Table Presentation