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(N4.1) PGR = Pretty Girl Relationships?Regulation &
Control
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:: Objectives ::In this topic, well learn:(a)What is
homeostasis(b)Detoxing the body the excretory system(c) (d)How
inner plumbing *really* works(e) (f)Zap up to life the nervous
system(g) (i)Are we that different from electrical wires?(j) (k)Do
you feel the chemistry between us?(l) (m)Got spider senses? the
hormone system(n)Controlling the *whee* sugar high!! (o) (r)Plants
have feelings, too!!N4
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:: Objectives ::Todays session, well learn:N4 Plant growth
regulators(o) (r)Plants have feelings, too!! What are plant growth
regulators Structure & function of i) Auxin(IAA) ii) Giberillin
(GA) iii) Abscisic acid (ABA) iv) Others (cytokinin &
ethene)
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:: um, Pretty Girl Relationships :: Plants have communication
systems, tooPlant nervous systemPlant hormone system
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:: um, Pretty Girl Relationships :: Plants have communication
systems, tooPlant nervous systemPlant hormone system
What are plant growth regulators (PGRs)? aka plant _________
secreted by specialized cells eg. ____________ move to other cells
using _________ &
_______________hormonesparenchymadiffusionactive transportaka plant
growth regulators
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:: oh, Plant Growth Regulators ::5 main PGRs Auxin /
indoleacetic acid (IAA) ~ growth of ______ & ______ Cytokinin ~
growth of ______ Gibberillins / gibberillic acid (GA) ~ growth of
______ Ethene ~ growth of ______ Abscisic acid (ABA) ~ _________ of
growthrootsrootsshootsfruitsinhibitionshoots
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:: oh, Plant Growth Regulators ::5 main PGRs Auxin /
indoleacetic acid (IAA) ~ growth of ______ & ______ Cytokinin ~
growth of ______ Gibberillins / gibberillic acid (GA) ~ growth of
______ Ethene ~ growth of ______ Abscisic acid (ABA) ~ _________ of
growthrootsrootsshootsfruitsinhibitionshoots
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:: auxin (IAA) ::Auxin / indoleacetic acid (IAA) Secretion ~ at
_________ ie. _______ & _______ Direction of transport
(_____________) ~ ______ from __________ Role(s) inPlant~ growth of
______ & ______ ~ apical ____________ ie. if at high [] at
apical bud inhibits lateral buds ~ inhibits
________________(ABA)meristemrootsshootsactive
transportawaymeristemrootsshootsdominanceabscisic acid
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:: gibberellins (GA)::Gibberellins / gibberellic acid (GA)
Secretion ~ in ___________ of young plants Direction of transport
(_____________) Role(s) inPlant~ growth of ______ at _________ ~
growth of ______ at _________Seed~ breakdown of ____________ ie. if
at high [] in seed breakdown aleurone layer synthesize amylase
breakdown starch
glucosechloroplastdiffusionsteminternodeleaflaminaendosperm
- :: abscisic acid (ABA) ::Abscisic acid (ABA) aka ______ PGR
Secretion ~ in ___________ of mature plants Direction of transport
(_____________) Role(s) inPlant~ closure of _________ ie. if at
high [] in leaf close H+ & K+in channels outside s >> GC
s outside
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:: In concerto!! ::In spring, a seed sprouts from the ground
____~ breakdown of endosperm____~ growth of roots &
shootsGAIAA
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:: In concerto!! ::In spring, a seed sprouts from the ground
____~ breakdown of endosperm____~ growth of roots & shootsIn
summer, the young plant begins to grow tall____ ~ growth of roots
& shoots____ ~ growth of stem & leafGAIAAIAAGA
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:: In concerto!! ::In spring, a seed sprouts from the ground
____~ breakdown of endosperm____~ growth of roots & shootsIn
summer, the young plant begins to grow tall____ ~ growth of roots
& shoots____ ~ growth of stem & leafIn autumn, the mature
plant begins to fade____ ~ closure of stomataChlorophylls cease
being produced____ ~ leaf abscissionGAIAAIAAGAABAABA
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:: Recap ::Plant growth regulators (PGRs) aka plant
hormonesAuxin / indoleacetic acid (IAA) ~ growth of roots &
shootsGibberellins / gibberellin acid (GA) ~ growth of stem &
leaf ~ breakdown of endospermAbscisic acid (ABA) ~ closure of
stomata ~ leaf abscission
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:: Homework :: Reading n/a (yay!) Revisionn/a (yay!)::
Reference(s) :: Jones, Fosbery, Taylor & Gregory pg. 289-292
Toole & Toole pg. 132-135 Clegg & MacKean pg. 422-433 (a
lot of details; useful for additional information)
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