The prevalent view for the translocation of o | vedclass

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Question

(B) The most widely accepted theory for the translocation of organic solutes (sugars) in plants is the $Mass \ flow \ hypothesis$,also known as the $P

Vedclass · Accepted Answer

Mass flow or pressure gradient hypothesis

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(B) The most widely accepted theory for the translocation of organic solutes (sugars) in plants is the $Mass \ flow \ hypothesis$,also known as the $Pressure \ flow \ hypothesis$ or $Munch \ hypothesis$.According to this theory,glucose produced in the source (leaves) is converted into sucrose and loaded into the phloem sieve tube elements.This loading creates a high osmotic pressure,causing water to enter the phloem from the adjacent xylem by osmosis.This results in a high hydrostatic pressure (turgor pressure) at the source,which pushes the sap towards the sink (areas of low pressure),where the solutes are unloaded.

The prevalent view for the translocation of organic solute in plants is

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