What is phloem loading and phloem …

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What is phloem loading and phloem unloading?

Posted by Sunidhi Singh 5 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 2 months ago

Translocation of organic solutes such as sucrose (i.e., photosynthetic) takes place through sieve tube elements of phloem from supply end (or source) to consumption end (or sink). But, before this translocation of sugars could proceed, the soluble sugars must be transferred from mesophyll cells to sieve tube elements of the respective leaves.

This transfer of sugars (photosynthetic) from mesophyll cells to sieve tube elements in the leaf is called as phloem loading. On the other hand, the transfer of sugars (photosynthetic) from sieve tube elements to the receiver cells of consumption end (i.e., sink organs) is called as phloem unloading. Both are energy requiring processes.

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Posted by Pandey Ji 5 months, 4 weeks ago

CBSE > Class 10 > Science