Chapter 7 - Transport in Flowering Plants

Transpiration

the loss of water vapour from the stomata of the leaves through diffusion.

Plant cells

________ lose water and become flaccid.

Capillary action

the tendency of water to travel up the narrow xylem tubes due to the interactions between water molecules and the xylem walls.

C

(________) Temperature- Heat increases the rate of evaporation and also increases the movement of water molecules.

Translocation

the process of transporting sugars from the leaves to other parts of the plant.

cuticle

Waterproof layer that minimises water loss in the stem.

dicotyledonous stems

In ________, the vascular bundles are arranged in a ring around a central pith.

large central vacuole

They have degenerate protoplasm, which means they lack organelles such as the nucleus, ribosomes and the ________.

single layer of cells

It is a(n) ________ bearing root hairs.

Cambium cells

________ can differentiate into new xylem and phloem tissues.

root hair

Each ________ is usually an outgrowth of a single epidermal cell, so they are one- cell thick.

loss of water vapour

This allows the ________ from the intercellular air spaces in the leaves as the air outside has a lower water vapour concentration than the air inside the leaf.

storage tissue

It consists of ________.

Transpiration pull

the suction force caused by transpiration that pulls water up the xylem.

rate of transpiration

The ________ will remain high as long as water vapour is continually being removed by wind.

Companion cells

Cells responsible for performing the metabolic functions of the sieve tube elements.

piliferous layer

Outermost, single layer of cells bearing root hairs.

Root pressure

Water moves into the xylem vessels by osmosis, creating a pressure that forces water to move upwards

Wilting

The process which takes place when the rate of transpiration exceeds the rate of water intake by the roots

Light intensity

apart from temperature, humidity and air movement, one other factor affecting the rate of transpiration.