Table of Contents
- 1 How is water transported through angiosperms?
- 2 What plant structure transports water and nutrients upward?
- 3 How are solutes being transported in the plant body?
- 4 How water and solutes are transported in plants?
- 5 How are solutes transported in the transpiration stream?
- 6 Which is the correct direction of phloem transport?
How is water transported through angiosperms?
Water is carried through the plant by the transpiration stream. Guard cells can regulate transpiration by the opening and closing of stomata where the plant hormone abscisic acid causes the closing of stomata.
What plant structure transports water and nutrients upward?
The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots. Xylem cells constitute the major part of a mature woody stem or root.
What transports water upwards?
The tension created by transpiration “pulls” water in the plant xylem, drawing the water upward in much the same way that you draw water upward when you suck on a straw. Cohesion (water sticking to each other) causes more water molecules to fill the gap in the xylem as the top-most water is pulled toward the stomata.
What is the structure that transports water?
Xylem
Xylem and phloem
| Tissue | What is moved | Process |
|---|---|---|
| Xylem | Water and minerals | Transpiration stream |
| Phloem | Sucrose and amino acids | Translocation |
How are solutes being transported in the plant body?
The increased solute concentration causes water to move by osmosis from the xylem into the phloem. The positive pressure that is produced pushes water and solutes down the pressure gradient. The sucrose is unloaded into the sink, and the water returns to the xylem vessels.
How water and solutes are transported in plants?
Water potential and transpiration influence how water is transported through the xylem in plants. The increased solute concentration causes water to move by osmosis from the xylem into the phloem. The positive pressure that is produced pushes water and solutes down the pressure gradient.
What are plant solutes?
Solute potential (Ψs), also called osmotic potential, is negative in a plant cell and zero in distilled water. Typical values for cell cytoplasm are –0.5 to –1.0 MPa. Solutes reduce water potential (resulting in a negative Ψw) by consuming some of the potential energy available in the water.
How does the structure of a plant affect the transport of water?
Describe how water potential, evapotranspiration, and stomatal regulation influence how water is transported in plants The structure of plant roots, stems, and leaves facilitates the transport of water, nutrients, and photosynthates throughout the plant. The phloem and xylem are the main tissues responsible for this movement.
How are solutes transported in the transpiration stream?
Solute Transport in the Xylem Some solutes are transported in the xylem Water and dissolved ions are the main substances in vessels/tracheids These materials are transported via transpiration stream
Which is the correct direction of phloem transport?
Thus, the typical direction of transport is downward from the primary source (leaves) to the major sink (roots). Rate of phloem transport Aphid experiments once again provide an answer…translocation rates average about 30 cm hour-1or even faster.
Where are the seeds stored in an angiosperm?
This difference in the number of embryonic leaves is the basis for the two major groups of angiosperms: the monocots and the eudicots. Seed food reserves are stored outside the embryo, in the form of complex carbohydrates, lipids, or proteins.