01:119:116 Lecture Notes - Lecture 10: Vascular Plant, Aeration, Water Potential

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Professor Beal

Document Summary

A. apoplast: apoplast- everything external to plasma membrane of living cells, cell walls, extracellular spaces, interior or dead cells. B. symplast- cytosol and plasmodesmata: symplast- the entire mass of cytosol of all living cells plasmodesmata that connect them. C. 3 transport routes (important: figure 36. 5: 1. ) Apoplastic route- h2o and solutes move along the continuum of cell walls, extracellular spaces: interconnected porous cell walls, most h2o and solute move via apoplastic route, 2. ) Symplastic route- h2o and solutes move along the continuum of cytosol: entry regulated by plasma membrane of first cell, after entry, they can move freely, 3. ) Transmembrane route- h2o and solutes move across cell wall and plasma membrane between neighboring cells: substances can use more than 1 route. A. osmosis: osmosis- diffusion of free h2o across membrane, absorption or loss of h2o by cell, direction of direct movement determined by water potential. Iv. transport of water and minerals from roots to shoots.