BIOL3711 Lecture Notes - Lecture 6: Cryptomonad, Nori, Anisogamy
26 Jun 2018
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Algae General
General
ALGAE – A large and diverse group of simple plant-like organisms, ranging
from unicellular to multicellular forms
Alga – singular
Algae – plural
Algae does not have flowers
SOME algae
oFlagella – for movement to surface for sun and vice versa
Algae types
oSingle cell with flagella
oFilamentous
oColonial (forming a colony decreases the chances of being eaten)
o
Algal diversity
Thousands of species
Characteristics:
oPhotosynthetic system
oChlorophyll
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oEukaryotic cells (except blue-green algae)
oNo root, stem, leaf, flowers
Importance of algae
Basal element of the food chain
oAlgae form the base of the food chain in marine and freshwater
environments
Algae zooplankton fish human
oLight provides the energy that drives this chemical reaction
Carbohydrate and oxygen are the main products of
photosynthesis
Human food
oKelps (large brown algae) and Poryphya (nori) serves as vegetables
and dishes for humans, particular in Asian countries
Industrial materials
oThickener
In food, textile and paper
oAgar
Capsules for drugs
Culture medium for bacteria
Gel for biochemical study
oMedicine
Vitamins, antibiotics, anticancer materials
oEnvironmental control
Reduce nutrient loading, detoxification for heavy metals
oBiofuels
Growing algae
Culture in test tubes
Flasks
Carboles
Carboyies
Tanks
Plastic bags
Morphological Diversity
Size: microns to 50m (seaweeds)
Flagellated solitary cells
oFlagellum (flagella pl)
oVary in number and position
Flagellated colony cells
oArranged in a flat PLATE or SPHERE
Non flagellated cells/colonies
oCan be solitary or colony
Filaments
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Algae a large and diverse group of simple plant-like organisms, ranging from unicellular to multicellular forms. Some algae: flagella for movement to surface for sun and vice versa. Algae types: single cell with flagella, filamentous, colonial (forming a colony decreases the chances of being eaten) o. Characteristics: photosynthetic system, chlorophyll, eukaryotic cells (except blue-green algae, no root, stem, leaf, flowers. Basal element of the food chain: algae form the base of the food chain in marine and freshwater environments. Algae (cid:0) zooplankton (cid:0) fish (cid:0) human: light provides the energy that drives this chemical reaction. Carbohydrate and oxygen are the main products of. Human food photosynthesis: kelps (large brown algae) and poryphya (nori) serves as vegetables and dishes for humans, particular in asian countries. Vitamins, antibiotics, anticancer materials: environmental control. Reduce nutrient loading, detoxification for heavy metals: biofuels. Flagellated solitary cells: flagellum (flagella pl, vary in number and position. Flagellated colony cells: arranged in a flat plate or sphere.
