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12: Plant water movement in xylem and phloem: A new perspective, 16.08.2017
Manage episode 199778695 series 2103354
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12 | 0:00:00 Start 0:00:44 Why study plants? 0:02:09 Agricultural production 0:03:54 Plant vascular transport 0:05:58 Drought kills trees 0:06:56 Question: Why do plants need (so much) water? 0:08:02 Exchange of water for CO2 0:08:27 Cost of CO2 Diffusion and Fick's law 0:14:32 Transport Processes: Diffusion and advection 0:16:08 The Advection-Diffusion equation 0:19:10 Wood microstructure 0:21:25 Question: What pressures are needed to drive flow? 0:25:23 Pressure-drop/Flow rate 0:28:10 Transport Processes: The Navier-Stokes Equation 0:36:29 The Stokes equation Hagen-Poiseuille law 0:38:20 Analogy between electric and fluidic systems 0:39:53 Sugar transport 0:42:12 What powers sugar transport? 0:45:01 Taking the blood pressure of plants 0:51:07 The Münch mechanism Osmotic pressure pump 0:52:53 The leaf is an osmotic pump 0:54:57 Synthetic Phloem: Experiments by Münch (1927)
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