Biology, asked by Soumya5887, 1 year ago

Pls explain me mass flow hypothesis i have exam ..

Answers

Answered by gaintboy70509000
1

The Pressure Flow Hypothesis, also known as the Mass Flow Hypothesis, is the best-supported theory to explain the movement of sap through the phloem. It was proposed by Ernst Munch, a German plant physiologist in 1930.


Soumya5887: Active transport moves the sucrose out of the phloem sap and into the cells which will use the sugar converting it into energy, starch, or cellulose.

Pls tell me here why only active transport occur not passive
Answered by krishh2001
1

The Pressure Flow Hypothesis, also known as the Mass Flow Hypothesis, is the best-supported theory to explain the movement of sap through the phloem. It was proposed by Ernst Munch, a German plant physiologist in 1930. ... This creates turgor pressure, also known as hydrostatic pressure, in the phloem.

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.


Soumya5887: Active transport moves the sucrose out of the phloem sap and into the cells which will use the sugar converting it into energy, starch, or cellulose.
Soumya5887: Pls tell me here why only active transport occur not passive ?
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