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Transport of food material in higher plants takes place through
A
Companion cells
B
Transfusion tissue
C
Tracheids
D
Sieve elements
Detailed Solution
Food, mainly sucrose, is transported from the source (leaves) to the sink through the phloem.
The conducting elements of phloem are the sieve elements (sieve tube elements in angiosperms, sieve cells in gymnosperms and pteridophytes), which form long columns with perforated sieve plates in their end walls.
Companion cells help to maintain the pressure gradient and to load sugars, but the actual channel of transport is the sieve tube.
Tracheids conduct water, and transfusion tissue occurs in gymnosperm leaves for lateral conduction.
Hence food is transported through sieve elements.
The conducting elements of phloem are the sieve elements (sieve tube elements in angiosperms, sieve cells in gymnosperms and pteridophytes), which form long columns with perforated sieve plates in their end walls.
Companion cells help to maintain the pressure gradient and to load sugars, but the actual channel of transport is the sieve tube.
Tracheids conduct water, and transfusion tissue occurs in gymnosperm leaves for lateral conduction.
Hence food is transported through sieve elements.