Flashcards
Cell Signalling V
Flashcards do conjunto (30)
- 1Important plant hormone classes + R location AGECBPAuxins - IC
Giberellins - IC
Ethylene - IC
Cytokinins - Cell surf.
Brassinosteroids - Cell surf
Photoreceptors - Cell surf BLUE IC Red - 2AuxinsNatural plant auxin is indoleacetic acid
Produced in seed embryo, meristems of apical buds and young leaves - 3Auxin functionStim. stem elongation, root growth + branching
Enhances apical development
Fruit development - 4TransportA.T. unidirectional shoot-base
Polar transport. - 5MOA (3)Bind to Nuc. R, which is a ubiquitin L
Binding promotes Ubiquitinylation + degradation of repressor protein
Suppression of gene transcription is relieved - 6Apical DominanceApex of stem has actively growing apical bud
Ap. bud suppresses lat. bud development/ branching
Caused by Ap. bud producing auxin in abundance - 7GiberellinsPromote seed germination + growth of stems/roots (amylase/proteases)
Flowering
Break winter dormancy - 8TransportCell to cell transport
Can act locally (paracrine) or on distant sites - 9MOABinds to cyto R, a ubiquitin L
Hormone/R complex then translocates to nucleus
Repressor protein is ubiquitinylated, degraded, and transcription proceeds - 10EffectsTurns dwarf plants to normal
Makes seedless grapes huge, removing seeds removes gibberellin makes fruit growth retarded - 11EthyleneFound in ripening fruit/ ageing leaves/flowers
- 12FunctionsPromotes fruit ripening
Blocks auxin and promotes leaf abscission + flower senescence
Response to mechanical stress - 13TransportPass through CW/air via diffusion
- 14MOAEthylene R in ER/Golgi membrane
W/O ethylene, R +'s KB-> + molecule C
- of ethylene R prevents KB action, allows C to + D which influences transcription - 15Common plant kinaseSerine/threonine
- 16CytokininsAll over the place the cheeky slags
- 17Functions*** Promotes Cell / ***
Inhibits leaf senescence
Promotes auxiliary bud growth
Chloro differentiation - 18TransportLong distance / paracrine
- 19MOA+ promotion of cytokinin-sensitive gene expression
L binding = + of kinase dom. of AHK R
(Arabdopsis histidine kinase)
IM AHP protein +pi His of ARR TF
ARR +, gene transcription occurs - 20Regulating cell cycle w/ cytokininsHistidine kinase use phosphate transfer
- 21BrassinosteroidsAll over the place, slags as well
- 22Brassinosteroids functionPromote xylem differentiation
Pt growth
Seed germination
Apical dominance
Leaf senescence
cell elongation
Cell / in shoots - 23TransportCell to cell, paracrine, don't travel
- 24MOABind to cell surf R when has K activity
Induces signal cascade
Ultimately - an inhibitory K of a TF that activates brassinosteroid sensitive genes.
(So quite selfish)
This can +Pi Tyr/ser/threonine - 25Photoreceptors-Blue lightContain either cryptochromes/phototropin/zeaxathin as ph. pig
Cell Surf R - 26Red lightPhytochromes
IC R - 27Phytochrome2 SU that etect red light
Portion w/ chromophore for light detection
Kinase domain for catalysis - 28MOAResides in cyto
Detects red light
Translocates to nucleus
modulates gene transcription by
Directly binding and + TF
Indirectly by +Pi TF - 29GPCR Plants vs. Humans
- 30GCR1/GPA1 knockout mutationViable, but weird phenotype
Informações
- Descrição
- O usuário eliminou as informações de disciplina FlashCards sobre Cell Signalling V, criado por Usuário eliminado em 01-04-2018.
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- Criado por J yadonknow · 1 abr 2018
- Copiado por J yadonknow · 1 abr 2018
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