Transport in Vascular Plants Flashcards
What are the 2 types of vascular tissues?
Xylem and Phloem
What is the transport in xylem and phloem?
Xylem: Transports water and dissolved minerals Phloem: Transports sugars
What is turgor?
Pressure caused by the fluid in the vacuole which helps it inflate. Without enough water plants lose turgor and wilt
What is active transport/ATP?
Required input of energy, uses proteins on membranes
What is diffusion?
Movement of solute from an area of high concentration to low concentration
What is osmosis?
Diffusion of water
What are the 3 stages of the transport of water/nutrients?
From soil to roots, from roots to stems, from stems to leaves
In detail what happens in the transport of water and nutrients from soil to roots?
Water enters through osmosis. Nutrients enter through active transport. Once both are inside they enter the vascular bundle.
In detail what happens in transport of water and nutrients from roots into stem?
Once the water and nutrients are in the xylem they form xylem sap. The sap is moved up by cohesion.
How does the xylem sap move up in the transport of water and nutrients?
Root pressure is created and causes a capillary action where the action increases as the tubes decrease in size
In detail what happens in the transport of nutrients and water from stem into the leaves?
After the xylem sap leaves the xylem column the plants transpire/ water is evaporated through the stomata.
How does the transport of sugars happen
Photosynthesis or from source to a sink
What is a source and a sink?
Source is an area with high concentration of sugars and other solutes like a leaf cell. A sink is an area with low concentration of sugars such as seeds and fruits.
What are the exact steps in the transport of sugars?
From source to phloem, translocation or through the phloem, and from phloem to sink cells
In detail what happens in the transport of sugars from source to phloem?
ATP across the cell membrane, increases sugars in the phloem increasing the turgor
