Algae I 藻類的分類群(algae phyla)

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Algae I
• Photosynthetic pigments
• As primary producers in the food chain of aquatic
environments.
• Classification is based on
1) Types of photosynthetic pigments
2) Types of storage products from photosynthesis
3) Ingredients of cell wall
4) Number and position of flagellate
5) The micro structure within the cell
6) The shape and characteristics of algae to distinguish
藻類的分類群 (algae phyla)

藍綠菌門(Cyanobacteria)

原綠藻門(Prochorophyta)

裸藻門(Euglenophyta)

隱藻門(Cryptophyta)

金黃藻門(Chrysophyta)

甲藻門(Pyrrophyta)

褐藻門(Phaeophyta)

紅藻門(Rhodophyta)

綠藻門(Chlorophyta)

輪藻門(Charophyta)
Domain Bacteria
Domain Eukarya
Experimental Content
1. 念珠藻 (Anabaena sp.) :Cyanobacteria, permanent slide
2. 角甲藻 (Ceratium sp.) : dinoflagellates, permanent slide
3. 矽藻 (Diatom): freshwater samples
4. 水綿 (Spirogyra sp.) : green algae, freshwater samples and
permanent slide
1. 念珠藻 (Anabaena sp.)
p. 58
 Filamentous cyanobacteria
 Heterocysts are specialized nitrogen-fixing cells
 An akinete is a thick-walled dormant cell derived from the
enlargement of a vegetative cell. It is a resting cell and serves
as a survival structure.
異型細胞
(heterocyst)
營養細胞
厚壁孢子
(vegetative cell) (akinete)
Heterocyst
營養細胞
(vegetative cells)
異型細胞
(heterocysts)
厚壁孢子
(akinetes)
permanent slide
2. 角甲藻 (Ceratium sp.)


p. 60
Dinoflagellates
covered with an armor-like cell wall
細胞壁
(cell wall)
橫溝
(cingulum)
(cell wall)
細胞核
(nucleus)
(橫溝)
(縱溝)
permanent slide
3. 淡水矽藻 (Freshwater diatom)
p. 59, 61
 A unique feature of diatom cells is that they are enclosed within a
cell wall made of silica (hydrated silicon dioxide) called a
frustule. These frustules show a wide diversity in form, but are
usually almost bilaterally symmetrical, hence the group name.
葉綠體
(chloroplasts)
Pond water
4. 水綿 (Spirogyra sp.)
p. 78, 79
 Spirogyra is a filamentous green alga.
 A vegetative cell contains a large vacuole, a cell nucleus,
cytoplasmic strands holding the nucleus in place and two cell
walls.
 The chloroplasts are ribbon-shaped spiral bands that extend from
one end of the cell to the other.
 Each chloroplast has several pyrenoids.
細胞核
(nucleus)
葉綠體
(chloroplast)
澱粉核
(pyrenoid)
 Draw the wet mount sample
a wet mount slide
permanent slide
細胞核
(nucleus)
細胞核
(nucleus)
澱粉核
(pyrenoids)
澱粉核
(pyrenoids)
葉綠體
(chloroplast)
葉綠體
(chloroplast)
 Spirogyra can reproduce both asexually (fragmentation) and
sexually (conjugation).
 Do not record
梯狀接合生殖 (Scalariform conjugation)
(1)
(2)
(3)
permanent slide
接合管
(conjugating tube)
結合子(zygote)

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