Table of Contents
How does glucose get transported in plants?
In plants, sugars are produced through photosynthesis in leaves. SWEETs transport diverse substrates including glucose and sucrose which is involved in long-distance sugar transport through a phloem loading mechanism from the source (leaves) to sink (fruits, roots) tissue.
How the food is transported to all parts of plants through phloem?
The transportation of food in phloem is achieved by utilizing energy from ATP. As a result, the osmotic pressure in the tissue increases forcing the water to move through it. This pressure moves the materials in phloem to the tissues which have less pressure.
How does transport occur in phloem?
Unlike xylem, phloem vessels contain cytoplasm, and this goes through holes from one cell to the next. Phloem transports sucrose and amino acids up and down the plant. This is called translocation .
What parts of the plant does the phloem carry glucose to?
Phloem are thinner tubes than xylem. They carry the glucose made in photosynthesis. They move the glucose from the leaves to wherever it is needed in the plant’s body. The glucose can be used to produce energy in respiration.
How did scientists prove that the food is transported through the phloem?
When a aphid is killing at the act of feeding then the body is carefull cut away but the proscis still inserted into the phloem then the food slowly exuded form cut end of the proboscis in the form of drops. These drops contain sugar and amino acids which means food is transported through phloem in plant.
How is food transported from phloem to the tissues according to plants needs Mcq?
How is food transported from phloem to the tissues according to plants’ needs? food is transported in only direction like water in the plant body through xylem.
Does the phloem transport glucose?
The mechanism by which sugars are transported through the phloem, from sources to sinks, is called pressure flow. At the sources (usually the leaves), sugar molecules are moved into the sieve elements (phloem cells) through active transport.
In which form is glucose transported through phloem?
sucrose
The sugars, synthesised in leaves (as a result of photosynthesis) are translocated downwards, upwards and laterally to all the other organs including storage organs mainly through phloem. These sugars are translocated in the form of sucrose.
Where is glucose transported after photosynthesis?
phloem
After sugars are produced in photosynthesis, these sugars must be transported to other parts of the plant for use in the plant’s metabolism. Part of the pressure-flow theory is that the sucrose produced is moved by active transport into the companion cells of the phloem in leaf veins.
Which of the following experiment showed that food in plant is transported through phloem?
Girdling experiment: Girdling of stem removes phloem tissue and the downward and upward movement of food gets blocked. So the stem portion shows swelling in the area due to accumulation of food material.
What is the girdling experiment?
Experiments now called girdling experiments were performed, in which a ring of bark is removed from a woody plant. Girdling, or ringing, does not immediately interfere with upward movement of water in the xylem, but it does interrupt phloem movement.
How is food transported from phloem to the tissues according to plants need * 1 point?