Identify the pathway of food transport in pla | vedclass

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Question

(B) The transport of food (sucrose) in plants occurs via the phloem,known as the Pressure-Flow Hypothesis or Mass Flow Hypothesis.$1$. At the source (

Vedclass · Accepted Answer

Source $\rightarrow$ Companion cell $\rightarrow$ Active transport $\rightarrow$ Sieve tube $\rightarrow$ Active transport $\rightarrow$ Companion cell $\rightarrow$ Sink

Vedclass · Answer

(B) The transport of food (sucrose) in plants occurs via the phloem,known as the Pressure-Flow Hypothesis or Mass Flow Hypothesis.$1$. At the source (leaves),sucrose is loaded into the companion cells and then into the sieve tube elements by active transport.$2$. This creates a high osmotic pressure in the sieve tube,causing water to enter from the xylem.$3$. The resulting pressure gradient pushes the phloem sap towards the sink.$4$. At the sink,sucrose is unloaded into the companion cells and then into the sink cells by active transport,followed by the exit of water.Therefore,the correct pathway is: Source $\rightarrow$ Companion cell $\rightarrow$ Active transport $\rightarrow$ Sieve tube $\rightarrow$ Active transport $\rightarrow$ Companion cell $\rightarrow$ Sink.

Identify the pathway of food transport in plants.

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