EEB268H1 Lecture Notes - Lecture 2: Green Algae, Beta-Carotene, Grass Green
25 Dec 2015
School
Department
Course
Professor
Document Summary
Recall chart with major algae groups and their features. Unicellular reproductive spore from brown algae (phaeophyta) Each have flagella (but flagella different: in green algae, 2 flagella anterior. Unikont (1 type of flagellum: flagella in brown are anchored in middle of cell. Carbon store different: in green algae starch stains purple, in brown algae, laminarin stains brown-red. Both have single cup shaped chloroplast: can also see extra set of membranes around chloroplast in brown. Directly derived from photosynthetic ancestor which was from product of primary endosymbiosis. See green box: green algae gave rise to land plants. Major accessory pigments: chlorophyll b, beta carotene, lutein: chlorophyll b gives algae green grass colour. Cell wall: cellulose, hemicellulose, pectins (hold walls together) Scenedesmus: can see pyrenoid bodies that have critical roles in algae. September 23rd, 2015: horns form on 2 of the cells. Function: deter herbivory by small fish/mammals, creates drag to prevent sinking.
