Table of Contents
What is the mass flow theory?
The mass flow hypothesis is a theory which attempts to explain how solutes are transported from source cells into sinks through the phloem. It isn’t concrete, but it is the best-accepted theory we currently have based on the available evidence.
What does Munch’s mass flow hypothesis explain?
Munch’s Mass Flow Hypothesis is the theory which explains the flow of food materials through the phloem from the concentration regions to lower concentration regions. The force is needed to move organic food materials downwards in the phloem. This is caused due to differences in osmotic potential.
What is the translocation theory?
While movement of water and minerals through the xylem is driven by negative pressures (tension) most of the time, movement through the phloem is driven by positive hydrostatic pressure. This process is termed translocation, and is accomplished by a process called phloem loading and unloading.
What is mass flow hypothesis Class 10?
Mass flow hypothesis is the theory that translocation of sugars in the phloem is brought about by a continuous flow of water and dissolved sugars between sources and sinks. (A source is the site of production of sugars, usually leaves, and the sink is the site of their utilization, for example the root system.)
What is mass flow theory of phloem transport?
The mass flow hypothesis is a theory that tells about how the sap flows through the phloem. This theory or hypothesis was first proposed in 1930 by German physiologist Ernst Munch. This theory tells us how simple sugar or a sugar that is highly concentrated organic sugar, is transported to other parts of a plant.
What is mass flow in transpiration?
Due to the incompressibility of water, this build up of water in the phloem causes the hydrostatic pressure to increase. This increase in hydrostatic pressure forces the phloem sap to move towards areas of lower pressure (mass flow)
Who describe the mass flow hypothesis?
The theory behind Mass flow hypothesis which is also called as pressure flow hypothesis describes the movement of sap via phloem, proposed by the German physiologist Ernst Munch in 1930.
What is mass flow in phloem?
The narrowness of the tubes and the existence of plates help to produce pressure differences between different areas of the phloem and to stimulate a vast movement of materials from one place to another. This is known as mass flow. The sucrose produced in the leaf cells is actively transported into the phloem cells.
What is translocation in biology class 10?
Answer: Translocation is a biological mechanism involving the transfer of water and other soluble nutrients from one part of the plant to another through the xylem and phloem, which occurs in all plants.
What is mass flow in plants?
Mass flow is the movement of dissolved nutrients into a plant as the plant absorbs water for transpiration. The process is responsible for most transport of nitrate, sulfate, calcium and magnesium. Diffusion is the movement of nutrients to the root surface in response to a concentration gradient.
How mass flow occurs in plants?
Why is mass flow important biology?
Mass flow is the movement of dissolved nutrients into a plant as the plant absorbs water for transpiration. The process is responsible for most transport of nitrate, sulfate, calcium and magnesium.
How does mass flow work biology?
Mass flow, also known as “mass transfer” and “bulk flow”, is the movement of fluids down a pressure or temperature gradient, particularly in the life sciences. As such, mass flow is a subject of study in both fluid dynamics and biology.
What is translocation Brainly?
Translocation is the movement of sucrose and other organic materials from one place to another within the plant body. It occurs through the phloem generally and the concentration (pressure) gradient stimulates this process.
What is translocation answer for Class 10?
Complete answer: Translocation is the process by which plants deliver minerals, plant growth hormones, water, and organic substance over long distances throughout the plants (from leaves to other parts).
What is mass flow transport?
Mass flow describes the movement of fluids down a pressure or temperature gradient, and it explains the transportation of food from sources to sinks. The mass flow hypothesis states that: Sucrose is co-transported into sieve tube elements from the companion cells, reducing the sieve tube’s water potential.
What is translocation in plants Class 11?
It is the movement of substance in bulk from one point to another as a result of pressure difference between two points. The bulk movement of substances through the conducting or vascular tissue of plants is called Translocation.
What is translocation plant?
Translocation is the movement of sugar produced in photosynthesis to all other parts of the plant for respiration and the other processes described above. This occurs in phloem cells.
What is translocation in Brainly?
Translocation is the movement of sucrose and other organic materials from one place to another within the plant body. It occurs through the phloem generally and the concentration (pressure) gradient stimulates this process. eddibear3a and 167 more users found this answer helpful. heart outlined. Thanks 102.
What is translocation how it takes place in plants Class 10?
Answer. Translocation is the movement of materials in plants from the leaves to other parts of the plant. Nutrients, mainly sugars, are created in the leaves during photosynthesis. These are then transported throughout the plant through phloem, which are a long series of connected cells.
What is mass flow theory of translocation?
This is the mass flow hypothesis for the mechanism of translocation in plants. This hydrostatic pressure turgor then shifts the sugars and other substances down the cells of the sieve tube towards the sink (roots). At the sink, the sugars are destroyed to become apoplast and then enter the symplast.
Who proposed the mass flow theory?
This theory was proposed in 1930 by German plant physiologist, Ernst Munch. The mass flow hypothesis states that the translocation of glucose and other sugars within the phloem is caused by a never-ending flow of water and dissolved nutrients between the source (a place where sugars are made) and sink (where sugars are utilized).
What is translocation in science?
the science hive 1 Translocation. Translocation is the movement of dissolved substances, such as sucrose and amino acids, from parts of the plant where the substances are made to other parts of the plant 2 The Mass Flow Hypothesis. 3 Active Loading.
What happens to translocation If respiration is inhibited?
Translocation is an active process, so if respiration is reduced or inhibited (e.g. using a respiratory toxin), translocation will be impaired. The mass flow hypothesis is a theory which attempts to explain how solutes are transported from source cells into sinks through the phloem.