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Plant cell cycle, angiosperms, monocots and eudicots
Typology: Lecture notes
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Spring 2025
Instructor:
Paul H. Lord
Exam #1: Monday
Examination
-^
Bring –
before classafter class
focus
on figures
&
tables
on timeready
Breaking news
12 Hours / week
1
2
3
4
before classafter class
on timeready
Breaking news
12 Hours / week
CONCEPTS Foci for Exam #
-^
-^
9
11
16
17
EVOLUTION WITHIN SPERMATOPHYTES:
Flower
‒^
derived from modified leaves
Fruit
Angiosperm Gametophyte
23
Eu
22
23
24
25
Example
Function
Structure
Cell Type
Leaf cellsFood storage tissuesof potatoes
PhotosynthesisCellular respirationStorage
Cube-shaped,loosely packed,thin-walled,relativelyunspecialized,containchloroplasts
Parenchyma
Strings runningthrough a stalk ofceleryTough roots (beet)
SupportWind resistance
ElongatedIrregularlythickened walls
Collenchyma
Tough fibers in jute(used to makerope)
SupportStrength
Very thick cell wallscontaining lignin
Sclerenchyma
Fully
or
partially undifferentiated tissue for growth
Covers
&
protects plant
Transports H
O, minerals, 2
&
sugars
to different parts of plant
Serves as site for
s
Provides a supporting matrix for vascular tissue
-^
Helps store H
&
sugars
STOMATA
Eudicot stem
Monocot stem
26
27
28
29
Function
Hormone
Stimulate shoot elongation, seed germination, & fruit &flower maturation
Gibberellins (GAs)
Main hormone responsible for cell elongation inphototropism & gravitropism, controls differentiation ofmeristem
Auxins
Promotes cytokinesis
Cytokinin
Inhibits stem elongation, induces dormancy in lateralbuds
Abscisic acid
Associated with fruit ripening, flower wilting, & leaf fall
Ethylene
Coordinate defense responses to herbivory
Jasmonates
Play a role in plant defense against bacterial & fungalinfections
Oligosaccharins
Promote seed germination, play a role in establishmentof mycorrhizae
Strigolactones
OTHER TERMS TO KNOW AntheridiumArchegoniaFemale: Male: MicrophyllsMegaphyllsCapsule’ThallusHomologousCuticleStomataFlavonoidsSecondary metabolites
CuticleSorus – SoriPollenSynapomorphyEudicotMonocotPalisadeCycadGinkoConeFlowerFruitFertilizationGametophyteSporophyte
12
6
2
2
O potential: 2 Ψ
system
total
s^
p^
g^
m
34
35
36
37
Questions on Plants
?
Office Hours
Monday: 12:00 pm - 1:15 pm
Thursday: 12:45 pm – 2:00 pm
Other times by appointment
Perna Sci Room 321
Spring 2025
38
39