Transport In Plants Flashcards
Lignin
Lignin is very strong and it’s used to thicken xylem vessel walls answer xylem vessels held to support Plans by keeping them up right
What is wood made of
What is almost completely composed of lignified xylem
Structure of phloem tubes
Phloem tubes I made up cells joined end to end
Companion cells
These are cells located right next to sieve tube elements and probably controls both cells
Vascular boundaries
Vascular boundaries are made up of bundles of xylem vessels and phloem cubes close together.
Movement of water through a plant
Water present in the soil moves into root hairs by osmosis
What’s that is sent up the plant by xylem vessels and into leaves for photosynthesis.
Water is diffused into the air by the leaves
Transpiration in plants
The evaporation of water from the surface of leaves creates a pull of water through the plant
Adhesion
This is the attraction between water molecules and the surface
Cohesion
The attraction which makes water molecules tend to stick together
Capillarity
Water molecules stick together on two surfaces of Naruto tubes and the water rises up the tube.
Root pressure
Water constantly moves into Roots by osmosis because of the presence of sugars and other dissolved substances in The Roots
How does water move in a plant
Water moves from high pressure in the roots to low pressure in the leaves
Transpiration rate
The faster the transpiration rate the faster the plant takes up water
Factors affecting transpiration rate
Temperature- with high temperatures transpiration rate increases
Humidity- transpiration decreases as humidity increases because the concentration gradient of water between the air spaces on the outside air is low on the rate of evaporation of water through the stoma is slow
Air movement- transpiration increases as wind speeds increase because water vapor is carried away rapidly
Light intensity- during a brightly the stoma is fully opened Woodstock, fully opened the rate of transpiration can be High
What are xerophytes
These are plants that live in places where water is short in Supply
Mesophites
These are plants that live in areas where water is readily available
Hydrophytes
These are plants that live in very wet, freshwater environments
Halophytes
Plants that live in water with the high concentration of salt
Adoptions of xerophytes
Find spine like leaves to reduce the number of stoma
Thickened stems or leaves capable of storing large amounts of water
An extensive root system to absorb water quickly when it rains
A thickened epidermis covered with a thick waxy cuticle
The availability to trap carbon dioxide at night so that the stoma can be closed during the day
Are the features such as strong consumer, who leaves and interlocking hairs
Translocation
The transport of organic food through a plant
