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Plant Developmental Biology (Coupland)

Plant Developmental Biology (Coupland). Plant Developmental Biology (Coupland). Elucidation of signaling pathways that control flowering in response to daylength (photoperiodism). Brassinosteroid synthesis and signaling and sugar signaling Protein modification by Ubiquitin and SUMO

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Plant Developmental Biology (Coupland)

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  1. Plant Developmental Biology (Coupland)

  2. Plant Developmental Biology (Coupland) • Elucidation of signaling pathways that control flowering in response to daylength (photoperiodism). • Brassinosteroid synthesis and signaling and sugar signaling • Protein modification by Ubiquitin and SUMO • Development of technologies (T-DNA tagging approaches, gene targeting, fluorescent-marker proteins, Mass Spec) • The circadian-clock system

  3. Interests... How do plants measure daily changes in environmental stimuli? How do plants decide the timing of development?

  4. 12 9 3 6 Roles of the Circadian Clock Leaf movement Hypocotyl growth Gene expression Protein phosphorylation Flowering time Cytosolic calcium Flower opening Chloroplast movement Stomatal opening

  5. Simple feedback model

  6. Firefly luciferase system promoter luciferase LHY CCA1 CAB GRP7

  7. Imaging system 7-day-old seedlings Luminescence assay Data analysis • Thousands seedlings, every 1 hour • Quantitative and statistical analyses

  8. 4 8 t i c W T 3 6 Time in light (h) 2 4 1 2 0 4 8 0 1 2 2 4 3 6 4 8 6 0 3 6 Time in light (h) 2 4 1 2 0 0 1 2 2 4 3 6 4 8 6 0 T i m e o f f i r s t p e a k i n d a r k n e s s ( h ) TIC functions at dawn elf3 data tic data

  9. Simple feedback model

  10. (tic doubles to elf3 and toc1 are similar)

  11. TIC CCA1 LHY ELF4 ELF3 TOC1

  12. Wouldn’t it be great ifwe could turn onflowering at will?

  13. Floral induction of pineapple plants by application of auxin

  14. Introducing the CDS(the Cassava Dating Service)

  15. The ethanol AlcR/AlcA system

  16. The Davis Lab

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