Chapter 35: Water and Sugar Transport in Plants

Surface tension

________ is a force that exists among water molecules at an air- water interface.

Cohesion

________ is molecular action among like molecules, such as the hydrogen bonding that occurs among molecules in water.

Casparian strip

The ________ does not affect water and ions that move through the plastic route.

Adhesion

________ is a molecular attraction among dissimilar molecules.

Endodermal cells

________ are tightly packed and secrete a narrow band of wax called the Casparian strip.

Phloem

________ consists largely of two cell types, sieve- tube elements, and companion cells.

vascular plants

In ________, a source is a tissue where sugar enters the phloem; a sink is a tissue where sugar exits the phloem.

movement of ions

The ________ and water into the root xylem is responsible for the process known as root pressure.

sieve

They are connected to one another, end to end, by perforated ________ plates.

Sieve tube elements

________ lack nuclei and most other organelles.

Casparian strip

The ________ blocks the apoplastic route by preventing water from moving through the walls of endodermal cells and into the vascular tissue.

In this case, the water interacts with a solid substrate

such as the glass walls of a capillary tube or the cell walls of tracheids or vessel elements-through hydrogen bonding

water potential

indicate the potential energy that water has in a particular environment compared with the potential energy of pure water at room temperature and atmospheric pressure

solute potential

tendency for water to move in response to differences in solute concentrations is determined by the ____.

Well pressure

The force exerted by the wall

turgor pressure

As water moves into the cell, the pressure of the fluid contents inside the cell

suberin

forms a waterproof barrier where endodermal cells contact each other

root pressure

Movement of ions and water into the root xylem is responsible for the process known as ___.