MP Board notes-Circulation

TRANSLOCATION IN PLANTS
A.Translocation is necessary as every part of the plant needs food to get energy and for developing his body.The translocation of water,salt and nutrients in plants talks place on the basis of these points-
1)Direction-  a)UPward direction    b)Radial direction    c)Downwardly
2)Path - Xylem and phloem
a)Continuity of vascular tissues is distributed by their removal.
b)Food materials are send upwardly
c)In radial dierection
Leaves make food by the process of photosysthesis.The food is in the form of a simple sugar.The food manufactured by the leaves is transported by a tube called phloem and process is called translocation.The movement of material through phloem depends on sieve tubes,which are living cells.These are connected with each other by perforated sieve plates,forming a continuous passage through which food dissolves substance can move freely.Food molecules enter the phloem cells from mesophyll cells of the leaf.After entering they can be transported to all parts of plant.

Green leaves of plant manufacture glucose as their food material.This is transported to different parts in the form of a solution.

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