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Plant Development How does plant development differ from animal development? Where do the various parts of a plant come from?

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Presentation on theme: "Plant Development How does plant development differ from animal development? Where do the various parts of a plant come from?"— Presentation transcript:

1 Plant Development How does plant development differ from animal development? Where do the various parts of a plant come from?

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4 = hemicellulose Plant Cell Wall

5 Cellulose microfibrils in cell wall Microtubules beneath plasma membrane

6 Cellulose microfibril synthesis

7 Cellulose microfibrils of primary cell wall Plant cell expansion

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10 Vegetative Shoot apical meristem (SAM)

11 Vegetative shoot apical meristem (SAM)

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15 Confocal microscope image of Arabidopsis root

16 Cyclin::GFP

17 Which cells are the stem cells?

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19 0d 1d 3d 5d Effect of ablation of quiescent center (QC) on tissue- specific marker gene expression (from Sabatini et al., 1999, Cell 99: 463-472) The Quiescent Center is the stem cell niche

20 Regulatory function of Rb protein

21 Wild type Rb-related RNAi silenced Silencing Rb-related gene results in extra stem cells Wildwater et al. (2005) Cell 123: 1337-1349 (Brown marks starch in differentiated root cap cells.)

22 Control Ectopic Rb-related expression Ectopic expression of Rb-related gene results in loss of stem cells Wildwater et al. (2005) Cell 123: 1337-1349 (slight overexpression) (strong overexpression)

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