Download Bryophytes

Dissecting microscope
 Magnification changer with magnification scale
Bryophytes
The incident light illumination is
made up of 5 LEDs.
p. 81
 Nonvascular plant, some species have the steam-liked and leafliked structures.
 The alternation of generations with obviously gametophyte and
sporophyte.
 The gametophyte is dominant organism. The sporophyte remains
attached to the gametophyte, deriving most of its nutrition from
the gametophyte.
Press once
Press twice
Press three
times
Gametophore of
female gametophyte
Press four
times
Thallus
Sporophyte
Sporophytes
Press once
Gametophyte
 Classification
The life cycle of liverworts
p. 85
A. Liverworts
Sporangium
B. Mosses
C. Hornworts
Liverworts
– Marchantia
1. Appearance
-- archegoniophore, antheridiophore, gemma cup
2. Observe the permanent slide showing section of the gemma
cup.
gemmae
gemma cup
Marchantia gemma cup
 Draw
3. Take out the gemma cup, a structure of asexual reproduction, on the
dorsal side of thallus, put it one the slides. Then press the edged
tissues of gemma cup gently. Drops water and cover the cover slide.
Observed the gemma .
Raindrop
The life cycle of mosses
p. 82
Sperm
“Bud”
Key
Haploid (n)
Diploid (2n)
Protonemata
(n)
“Bud”
Antheridia
Male
gametophyte
(n)
Egg
gemma
Spores
Spore
dispersal
Peristome
gemma cups
Calyptra
Sporangium
MEIOSIS
Mature
sporophytes
gemmae inside
Capsule with
peristome (SEM)

Mosses - Polytrichum
Zygote
(2n)
FERTILIZATION
(within archegonium)
Embryo
 Vascular plants
 No flowers, fruits, and seeds having true
leaves (Seedless Plants), can see sorus of
the back side of leaves.
Calyptra
Capsule or
Sporangium
Seta
Female
Gametophyte
Young
sporophyte
Female(2n)
gametophytes
Pteridophytes
1. Observe the appearance of a
female gametophyte that has an
attached sporophyte.
Sporophyte
Seta
Capsule
(sporangium)
Foot
Female Archegonia
gametophyte (n)
Rhizoid
Archegonium
 Draw
2 mm
thallus
Gametophore
 Draw
假根(Rhizoid)
• Dissecting microscope
 Like all other vascular plants, they have a
life cycle referred to as alternation of
generations, characterized by a diploid
sporophytic and a haploid gametophytic
phase. Unlike the gymnosperms and
angiosperms, the ferns' gametophyte is a
free-living organism.
p. 91
P. 96
Classification
The surface of
sorus of some
species which is
covered by
indusium, but
some species
are not.
A. Fern allies

Psilotopsida

Equisetopsida
B. True ferns

Marattiopsida

Polypodiopsida
The life cycle of a typical fern
The indusium is linear, and
sporangium grows on the lateral
vein.
The leaf edge folds to the fake indusium.
p. 97
Ferns
annulus
1. Take some sporangia from the leaf using
a forceps and make a slide.
lip cells
stalk
Round and kidney-liked
indusium, and grows on the
top of veins.
Round indusium, and grows on the side of
veins.
2. Break the sporangium, and observe the
spores.
 Draw