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Lecture 10

BIOL 101 Lecture 10: Ch 27 bio

4 pages55 viewsFall 2016

Course Code
BIOL 101

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The Plant Kingdom: the land plant clade
Part 1: seedless land Plants
Review question:
Which groups belong with the land plants in the “plants in the broad sense?”
Red and green algae
Plants: in the broad sense
Monophyletic group including (KNOWN AS ARCHAEPLASTIDS)
Red algae
Green algae
Land Plants
Based on
Molecular data
Presence of chloroplasts from PRIMARY endosymbiosis
Primary Endosymbiosis: bounded by 1 inner and 1 outer membrane
Plants in the narrow sense: Land plants
Land plants= embryophytes
EX: liverworts, mosses, hornworts, vascular plants
Some green algae are closer related to plants than they are to other green algae
Diagnostic characters of land plants:
Multicellular eukaryote (common sense)
Photosynthesis/non-functioning chloroplasts
If not photosynthetic they lost that trait years ago but still have chloroplasts
Cell wall made of cellulose
Embryo protected within mother plants
If not protected it would dry up (it is held onto unlike in green algae)
Alternation of generations
Distinguishes from fungi, protists, and algae
1-4 occur in green algae
5 is synapomorphy of land plants
Colonization of land by plants:
Required anatomical, physiological, and reproductive adaptations including:
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