Why are plants long and thin
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Bela Mulder - Why are plants long and thin08/08/2012 [1]
Waarom zijn planten lang en dun
Why are plants long and thin ?
Bela MulderTheory of Biomolecular Matter
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Bela Mulder - Why are plants long and thin
Individual plant cell become elongated with age
08/08/2012 [2]
Laskowski et al. Plos Biology(2008)
youngold
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Bela Mulder - Why are plants long and thin
Plant cells grow by stretching
08/08/2012 [3]
yield
resist
turgor pressure
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Bela Mulder - Why are plants long and thin
Plant cell wall: a fiber reinforced structure
08/08/2012 [4]
Cellulose microfibrils
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Bela Mulder - Why are plants long and thin
Fiber direction is crucial for growth
08/08/2012 [5]
Unfavorable
Favorable
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Bela Mulder - Why are plants long and thin
Guiding the motion of cellulose synthases
08/08/2012 [6]
Cellulose microfibril
“Fiber factory” = protein-complex
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Bela Mulder - Why are plants long and thin
The “rail complex” of the growing cell
08/08/2012 [7]
Microscopiy:Pankaj Dhonukse, UvA
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Bela Mulder: NTVB Schoorl Meeting
Microtubule “Dynamic instability”
25/05/2012 [8]
ShrinkingGrowing
length (mm)
time (min)
catastrophe
rescue
15.2 μm
231 s
Anna Akhmanova, EMC
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Bela Mulder: NTVB Schoorl Meeting
Cortical microtubule “collision dynamics”
25/05/2012 [9]
zippering
induced catastrophe
cross-over
R. Dixit & R. Cyr, Plant Cell (2004)
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Bela Mulder - Why are plants long and thin
Microtubule “scattering cross-sections”
08/08/2012 [10]
Data: Dixit & Cyr (2004) Tobacco BY-2 cells
zippering cross-over
induced catastrophe
zipperingcross-over
induced catastrophe
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Bela Mulder - Why are plants long and thin
Analytical dynamical model
08/08/2012 [11]
growing
shrinking
inactive
rescue catastrophe
induced catastrophe zippering growth
rescue catastrophe
induced catastrophe shrinkagereactivation
zippering reactivation
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Bela Mulder - Why are plants long and thin
Spontaneous alignment predicted
08/08/2012 [12]
isotropic
fully ordered no zippering
strong zippering
Critical interaction strength
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Bela Mulder - Why are plants long and thin
Survival of the aligned
08/08/2012 [13]
experience fewer collisions and hence become longer
is likely to undergo catastrophic collision
is likely to shrink back to zero length
can be renucleated in a more favourable direction
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Bela Mulder - Why are plants long and thin
Computer simulations
08/08/2012 [14]
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Bela Mulder - Why are plants long and thin
Aan het werk
08/08/2012 [15]
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Bela Mulder - Why are plants long and thin
Results are close to reality
08/08/2012 [16]
in silico
in vivo
Microscopy: Jan Vos, WUR
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Bela Mulder - Why are plants long and thin
Not just curiosity
08/08/2012 [17]
From which source should we get our biofuels?
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Bela Mulder - Why are plants long and thin
Lots of (unused) cell wall available
08/08/2012 [18]
5% of the earth’s biomass is in cell walls !
Only ruminants are able to digest cellulose
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Bela Mulder - Why are plants long and thin
Acknowledgements
08/08/2012 [19]
The grey materialists
RhodaHawkins
AMOLF → Paris → Bristol → Sheffield
EvaDeinum
AMOLF → AMOLF+WUR
Jelmer Lindeboom
AMOLF → WUR → Stanford
Simon Tindemans
AMOLF → Imperial College
The €’s
EU- NoE “Active Biomics”
Computational Life Science
EU- NEST “CASPIC”
Jan Vos WUR
Annemie Emons WUR/AMOLF
Dave Ehrhardt Stanford
The green fingers
Pankaj DhonuksheUtrecht
Ben ScheresUtrecht
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Bela Mulder - Why are plants long and thin
Het corset van de cel: de celwand
08/08/2012 [20]
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Bela Mulder - Why are plants long and thin
Het corset is hard nodig
08/08/2012 [21]
Aan Uit
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Bela Mulder - Why are plants long and thin
Constructie van de celwand
08/08/2012 [22]
Cellulose microvezelsBaleinen
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Bela Mulder - Why are plants long and thin08/08/2012 [23]
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Bela Mulder - Why are plants long and thin
Met de voeten in de modder en het hoofdje in de zon
08/08/2012 [24]
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Bela Mulder - Why are plants long and thin
Microtubules: the (dynamical) Lego™ of life
08/08/2012 [25]
zippering
induced catastrophe
cross-over
Microscopy: Anna Akhmanova, UMR