According to the Mass Flow Hypothesis, what creates the pressure gradient required for the movement of sugars?
Transpiration pull
Root pressure
Loading of sugars at the source and unloading at the sink
Capillary action
Related Questions
Which of the following mechanism can explain the transport of sucrose from source to sink?
Osmotic movement of water into sugar loaded sieve tube cells which create a higher hydrostatic pressure into the source than in the sink
Tension created by differences in pressure potential between source and sink
Active absorption of sucrose through sieve tube membrane driven by a specific pump
Transpiration and active transport of sugar from source to sink
In the context of the Mass Flow Hypothesis, a 'sink' refers to a region where:
Sugars are produced
Sugars are unloaded and utilized or stored
Water is absorbed
Minerals are transported
Translocation of organic materials in plants is explained
Active transport
Transpiration pull
Inhibition theory
Mass-flow hypothesis
Which of the following is NOT a crucial factor for the Mass Flow Hypothesis?
Hydrostatic pressure gradient
Active loading of sugars at the source
Presence of chlorophyll
Active unloading of sugars at the sink
Munch hypothesis is based on
Translocation of food due to TP gradient and imbibition force
Translocation of food due to turgor pressure (TP) gradient
Translocation of food due to imbibition force
None of the above
Which of the following mechanism can explain the transport of sucrose from source to sink?
Osmotic movement of water into sugar loaded sieve tube cells which create a higher hydrostatic pressure into the source than in the sink
Tension created by differences in pressure potential between source and sink
Active absorption of sucrose through sieve tube membrane driven by a specific pump
Transpiration and active transport of sugar from source to sink
In companion cells, during translocation, organic nutrient is loaded mainly in the form of
Sucrose
Glucose
Starch
Glucose and fructose
Arrange the following events of mass flow of organic material in sequence
I. Sugars are transported from cell to cell in the leaf
II. Food is synthesised in form of glucose by leaf cells
III. Movement of water takes place into sieve tube elements
IV. Downward movement of sugar occurs in the stem
V. Solutes are actively transported into the sieve elements
I, II, III, V, IV
II, I, V, III, IV
II, III, I, V, IV
I, II, V, IV, III
The transport of organic and inorganic substances in plants over longer distance occurs through vascular tissue by the means of
Diffusion
Facilitated diffusion
Active transport
Mass flow
Bulk flow of water, minerals and organic solutes is due to?
Pressure
Light
Temperature
1 and 2
