k: plantae = the land plants
DESCRIPTION
K: Plantae = The Land Plants. What is a plant?. Multicellular autotroph?. With complex tissues?. And blue pigment, phycocyanin. From green algae - early clues Chlorophylls Carotenoids & other pigments Starch Cellulose. Alternation of generation. From Charophycean green algae - PowerPoint PPT PresentationTRANSCRIPT
K: Plantae = The Land Plants
What is a plant?
Multicellular autotroph?
With complex tissues?
And blue pigment, phycocyanin
From green algae - early clues
Chlorophylls
Carotenoids & other pigments
Starch
Cellulose
Alternation of generation
From Charophycean green algae
1. rosette terminal complexes (RTCs) in plasma membrane for making cellulose
2. Special peroxisomal enzymes for toxic oxygen products
chlorophytes charophytes/land plants
From Charophycean green algae
3. Type of flagellar root base
4. phragmoplasts (for cytokinesis)
(4 bundles)
microtubulesmicrotubules
Charophycean algae
retain zygote
Alternation of generation
mitosis
mitosis
mitosis
mitosis
mitosis
Walled spores made in sporangium/ia
Gametes made in gametangium/ia
Male: antheridium/ia
Female: archegonium/ia
Apical meristems 33-6
33-7
Non-vascular plants
Moss life cycle
Plants (gametophytes) can be
hermaphroditic/bisexual
monoecious
dioecious
Plants (sporophytes) can be
homosporous
heterosporous
Cuticle with flavonoids
Rhizoids
Air pore
Major innovations
P: Bryophyta = mosses
Sphagnum
P: Hepatophyta = liverworts
P: Anthocerophyta = hornworts
Seedless vascular plants
xylem
phloem
P: Lycopodiophyta
stems
rhizoids
Early vascular plant (fossil): Rhynia
First leaves
P: Lycopodiophyta
Lycopodium = ground pine/cedar
homosporous
Selaginella = spike moss
heterosporous
heterosporous too
P: Pteridophyta = ferns
Azolla = mosquito fern
Fern life cycle
indusium
Innovations/ changes
“Big” leaves
croziers = fiddleheads
Horsetails = scouring rushes