Transcript Oct.24th - University of Maine System

Day
T
Th
T
Th
T
Th
T
Th
T
Th
Date
Reading Topic
10/15
no class – October Vacation
10/17
More plant development
10/22
Ch. 8
Mechanisms of morphogenesis
10/24
More morphogenesis
10/29
Ch. 10
Cell differentiation
10/31 Happy Halloween!
Stem cells
11/5
Ch. 11
Organogenesis
11/7
More Organogenesis
11/12
11/14
Ch. 12
Development of the nervous system
T
11/19
EXAM 2 Chapters 2, 6, 8, 10
Th
11/21
Ch. 9
The saga of the germ cell
T
11/26
More on reproduction
term paper is due at the beginning of class on Tuesday, 11/19
Th
11/28
Your
no class – Thanksgiving Break
Also remember there are two, short writing assignments, each worth 20 points.
Pick any topic in developmental biology (except your term paper topic) and learn more about it. Then
write a two page paper and include all the sources you used (those can include any sources including web
sites, newspapers, TV, etc). These are due anytime.
Genes to focus on during Drosophila embryogenesis
Bicoid
Hunchback
Even-skipped
Engrailed
Antennapedia
Hedgehog
Wingless
Gurken
Toll
Dorsal
Decapentaplegic
Short gastrulation
not in text
2.39 Hh/Wg
4 nuclei
2.37 clones
in wing
Box 1E Wnt signal transduction
2.40 Hh signaling pathway
http://en.wikipedia.org/wiki/Compartment_(development)
2.37 clones
in wing
not in text:
Dorsal handout
2.23 Dorsal
/DPP grad.
2.21 D/V slice
Fig. 2.19
Comparing animals and plants:
Invented multicellularity independently
Some differences:
No germ line cells in plants
(plants are easy to clone.
No maternal factors???)
No morphogenesis in plants
(very simple fate maps)
Plant cells contain plasmodesmata
(a type of gap junction between cells)
Comparing animals and plants:
Invented multicellularity independently
Some differences:
No germ line cells in plants
(plants are easy to clone.
No maternal factors???)
No morphogenesis in plants
(very simple fate maps)
Plant cells contain plasmodesmata
(a type of gap junction between cells)
7.4 fate map
7.22 root fates
Comparing animals and plants:
Invented multicellularity independently
Some differences:
No germ line cells in plants
(plants are easy to clone. No maternal factors???)
No morphogenesis in plants
(very simple fate maps)
Plant cells contain plasmodesmata
(a type of gap junction between cells)
Fig. 1.23
Fig. 6.35
FT mRNA is transcribed in leaves and then the mRNA
goes through plasmodesmata on the way to cells in the
shoot meristem where it is translated into a transcription
factor protein that regulates transcription of genes for
flowering.
Fig. 1.23
Comparing animals and plants:
Invented multicellularity independently
Some similarities:
Totipotency
(each cell retains the entire genome)
Stem cells (called initials in plants)
Stem cell niches (called meristems in plants)
Homeotic genes
(but the genes are different in plants vs animals)
7.10 stem/leaf pattern
Animal terms = totipotent, pluripotent
Plant term = indeterminant