Thursday, February 25, 2010

Transpirational Pull

Maria-Cristina linked to David Attenborough's Private Life of Plants series below but I thought I'd add this clip about plant water transport. He makes an obvious point that I'd never thought of before - plants move all this water silently! I also realize that like David Attenborough I forgot to point out that this entire process ('pulling' up very long thin tubes of water) only works because of the extraordinary properties of water - in this case its hydrogen bonding which gives the tube of water great strength.

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